C H A P T E R  8

Feedback OSPFv3

OSPFv3 is the modified form of OSPF to support version 6 of IP. The fundamental mechanisms of OSPF remain unchanged, such as: flooding, DR election, area support, SPF calculations, and so on. However, some changes have been necessary due to either changes in protocol semantics from IPv4 to IPv6, or simply to handle the increased address size of IPv6.


8.1 OSPFv3 Commands

The list of CLI commands for the configuration of OSPFv3 are as follows:

8.1.1 ipv6 router ospf

Enables the OSPFv3 routing protocol. The no form of the command disables the OSPFv3 routing protocol.


ipv6 router ospf


no ipv6 router ospf


Mode

Global Configuration

Defaults

Disabled.

Example

SEFOS(config)# ipv6 router ospf

Notes

The no form of the command disables all the interfaces and triggers flushing of self-originated LSAs and deletes the router’s link state database.


8.1.2 router-id - IPv4-address

Sets a fixed router identifier.


router-id IPv4-address


Syntax Description

IPv4-address - A 32-bit integer that uniquely identifies the router in the autonomous system.

Mode

Router Configuration

Defaults

IPv4-address - 0.0.0.0

Example

SEFOS(config-router)# router-id 11.0.0.1


Related Commands

8.1.3 area - stub | nssa

Defines an area as a stub area or an NSSA.


area area-id {{stub | nssa} [no-summary]}


Syntax Description

area-id - A 32-bit integer.

stub - Stub area.

nssa - NSSA.

no-summary - Allows an area to be a stubby or not-so-stubby but does not allow it to have summary routes injected into it.

Mode

Router Configuration

Example

SEFOS(config-router)# area 1.1.1.1 stub no-summary

Notes

  • In stub area, the generation of summary LSA is optional.
  • If no-summary option is specified in the command, then the router neither originates nor propagates summary LSAs into the stubby area or NSSA. It relies entirely on its default route.
  • If the no-summary option is not specified, the router summarizes and propagates summary LSAs.
  • The no-summary option can be specified only in the area border Routers and by default, it is set to send summary.

Related Commands

8.1.4 area - stability-interval

Configures the stability interval (in seconds) for the NSSA. The no form of the command sets the default value of the stability interval for the NSSA.


area area-id stability-interval seconds_1-65535


no area area-id stability-interval


Syntax Description

area-id - A 32 bit integer.

stability-interval - The number of seconds after which an elected translator determines that its services are no longer required, and that it must continue to perform its translation duties.

Mode

Router Configuration

Defaults

stability-interval - 40

Example

SEFOS(config-router)# area 0.0.0.1 stability-interval 50


Related Commands

8.1.5 area - translation-role

Configures the translation role for NSSA. The no form of the command configures the default translation role for the NSSA.


area area-id translation-role {always | candidate}


no area area-id translation-role


Syntax Description

area-id - A 32-bit integer.

translation-role - An NSSA border router’s ability to perform NSSA Translation of Type-7 LSAs to Type-5 LSAs.

Mode

Router Configuration

Defaults

translation-role - candidate

Example

SEFOS(config-router)# area 0.0.0.1 translation-role always

Notes

When the translator role is set to always, the Type-7 LSAs are always translated into Type-5 LSAs.

When translator role is set to candidate, an NSSA border router participates in the translator election process.


Related Commands

8.1.6 timers spf

Configures the delay time and the hold time between two consecutive SPF calculations. The no form of the command sets the default values for spf-delay and spf-holdtime.



Note - Delay time is the time interval when OSPFv3 receives a topology change and when it starts a Shortest Path First (SPF) calculation.



timers spf spf-delay spf-holdtime


no timers spf


Syntax Description

spf-delay - The interval by which SPF calculation is delayed after a topology change reception.

spf-holdtime - The delay between two consecutive SPF calculations.

Mode

Router Configuration

Defaults

spf-delay - 5

spf-holdtime - 10

Example

SEFOS(config-router)# timers spf 10 20


Related Commands

8.1.7 abr-type

Sets the ABR (Area Border Router) type.


abr-type {standard | cisco | ibm}


no abr-type


Syntax Description

standard - Standard ABR type.

cisco - CISCO ABR type.

ibm - IBM ABR type.

Mode

Router Configuration

Defaults

standard

Example

SEFOS(config-router)# abr-type cisco


Related Commands

8.1.8 area - default-metric value

Sets the default metric value for an area of type NSS/stub only.


area area-id default-metric metric


Syntax Description

area-id - A 32-bit integer.

default-metric - Cost for the default summary route in a stub/NSS area.

Mode

Router Configuration

Defaults

default-metric - 1

Example

SEFOS(config-router)# area 1.1.1.1 default-metric 20

Notes

Default metric can be defined only for a valid area.


Related Commands

8.1.9 area - default-metric type

Sets the default metric-type for an area type of NSS or stub only.


area area-id default-metric type metric-type_1-3


Syntax Description

area-id - A 32 bit integer.

default-metric type - Type of metric.

Mode

Router Configuration

Defaults

default-metric type - 1

Example

SEFOS(config-router)# area 1.1.1.1 default-metric type 2

Notes

Default metric can be defined only for a valid area.


Related Commands

8.1.10 area - virtual-link

Sets the virtual link between areas.

In OSPFv3, all areas must be connected to a backbone area. If there is a break in backbone continuity, or the backbone is purposefully partitioned, a virtual link can be established. The two endpoints of a virtual link are ABRs. The virtual link must be configured in both routers. The configuration information in each router consists of the other virtual endpoint (the other ABR) and the non-backbone area that the two routers have in common (called the transit area).

If 20.0.0.3 is the Router ID of the Neighbor and 100 is the Interface Index assigned to the OSPFv3 virtual interface, then this interface index is advertised in Hello packet sent over the virtual link and in the router’s router-LSAs.


area area-id virtual-link router-id if-index [hello-interval seconds] [retransmit-interval seconds] [transmit-delay seconds] [dead-interval seconds]


Syntax Description

area-id - A 32-bit integer.

router-id - The Router ID of the virtual neighbor.

if-index - Interface Index assigned to the OSPFv3 virtual interface.

hello-interval - The interval between hello packets on the OSPFv3 virtual link interface. This value ranges between 1 and 65535 seconds.

retransmit-interval - The time between link-state advertisement (LSA) retransmissions for adjacencies belonging to the OSPFv3 virtual link interface. This value ranges between 1 and 1800 seconds.

transmit-delay - The estimated time it takes to transmit a link state update packet over this interface. This value ranges between 1 and 1800 seconds.

dead-interval - The interval at which hello packets must not be seen before its neighbors declare the router down. This value ranges between 1 and 65535 seconds.

Mode

Router Configuration

Defaults

hello-interval - 10

retransmit-interval - 20

transmit-delay - 1

dead-interval - 60

Example

SEFOS(config-router)# area 1.1.1.1 virtual-link 20.0.0.3 1 hello-interval 50 retransmit-interval 6 transmit-delay 6 dead-interval 100

Notes

  • Virtual links cannot be configured through stub areas.
  • hello-interval and dead-interval values must be the same for all routers on a specific network.

Related Commands

8.1.11 ASBR Router

Configures the router as an ASBR. The no form of the command disables the ASBR status of the router.


ASBR Router


no ASBR Router


Mode

Router Configuration

Example

SEFOS(config-router)# ASBR Router

Notes

Only when ASBR status is configured to enable, routes from other protocols are redistributed into OSPFv3 domain.


Related Commands

8.1.12 area - range

Creates the internal aggregation address range. The internal address range is of two types:

Related Commands

8.1.13 area - range - cost

Summarizes routes at an area boundary. This command operates similar to the command area - range.


area area-id range IPv6-prefix | prefix-length [{advertise | not-advertise}] [tag value] [cost cost]


Syntax Description

area-id - Area identifier. This is a 32-bit integer.

ipv6-prefix - The IPv6 address prefix of the range.

prefix-length - The prefix length of the address range.

advertise - Flushes out all the routes (LSAs) falling in the range and generates aggregated LSA for the range.

not-advertise - Suppresses routes that match the prefix/prefix-length pair.

tag - Sets the tag value for the aggregated route. The tag value is used to communicate information between AS boundary routers.

cost - Metric or cost for a summary route, which is used during OSPF SPF calculation to determine the shortest paths to the destination. This value ranges between 0 and 16777215.

Mode

Router Configuration

Defaults

tag - 0

Example

SEFOS(config-router)# area 0.0.0.0 range 3ffe:5000:481d::5 / 80 advertise tag 20

Notes

The optional parameter tag is used to set the tag value for the aggregated route. This is not used by the OSPFv3 protocol alone. It can be used to communicate information between AS boundary routers.


Related Commands

8.1.14 area - summary-prefix

Enables route aggregation or filtering while importing routes in the OSPFv3 domain. The command configures Type-5 and Type-7 address range specifying whether Type-5 or Type-7 LSAs are generated or not for the configured range for the particular area.


area area-id summary-prefix IPv6-prefix prefix-length [{allowAll | denyAll | advertise | not-advertise}] [Translation {enabled | disabled}]


Syntax Description

area-id - A 32-bit integer.

summary-prefix - Summary prefix.

ipv6-prefix - The IPv6 address prefix of the range.

prefix-length - The prefix length of the address range.

allowAll - When set to allowAll and the associated area-id is 0.0.0.0, aggregated Type-5 LSAs are generated for the specified range. In addition, aggregated Type-7 LSAs are generated in all the attached NSSAs for the specified range.

denyAll - When set to denyAll, neither Type-5 LSA nor Type-7 LSAs are generated for the specified range.

advertise - When the associated area-id is 0.0.0.0, aggregated Type-5 LSAs are generated. Otherwise, if the associated area-id is x.x.x.x (other than 0.0.0.0), aggregated Type-7 LSA is generated in NSSA area x.x.x.x.

not-advertise - When the associated area-id is 0.0.0.0, Type-5 LSA is not generated for the specified range, while all the NSSA LSAs within this range are flushed out and aggregated Type-7 LSA is generated in all attached NSSAs. If associated area-id is x.x.x.x (other than 0.0.0.0), Type-7 LSA is not generated in NSSA x.x.x.x for the specified range.

Translation - When set to enabled, the P-Bit is set in the generated Type-7 LSA. When set to disabled, the P-Bit is cleared in the generated Type-7 LSA for the range.

Mode

Router Configuration

Defaults

Translation - enabled

advertise

Example

SEFOS(config-router)# area 0.0.0.0 summary-prefix 3ffe:5000::481d::5 80 allowall Translation enabled

Notes

The value allowAll/denyall is not valid for area-id other than 0.0.0.0.


Related Commands

8.1.15 redistribute

Configures the protocol from which the routes have to be redistributed into OSPFv3. The no form of the command disables the redistribution of routes from the given protocol into OSPFv3.


redistribute {static | connected | ripng | bgp}


no redistribute {static | connected | ripng | bgp}


Syntax Description

static - Advertises routes, configured statically in the OSPFv3 routing process.

connected - Advertises directly connected networks routes in the OSPFv3 routing process.

ripng - Advertises routes that are learnt by the RIP process in the OSPFv3 routing process.

bgp - Advertises routes that are learnt by the BGP process in the OSPFv3 routing process.

Mode

Router Configuration

Example

SEFOS(config-router)# redistribute static

Notes

To configure Redistribution of routes from other protocols, the following steps must be performed.

1. Configure the router as ASBR.

2. Configure redistribution of routes from particular protocol.

The above order must be maintained and ASBR setting must be done before enabling redistribution.


Related Commands

8.1.16 passive-interface

Sets the global default passive interface status. All the interfaces created after executing this command become passive interfaces. The no form of the command resets the global default passive interface status. All the interfaces created after executing this command become non-passive interfaces.


passive-interface


no passive-interface


Mode

Router Configuration

Defaults

Disabled.

Example

SEFOS(config-router)# passive-interface


Related Commands

8.1.17 host - metric | area-id

Configures a host entry with metric or area-id.


host IPv6-address {metric cost} [area-id {area-id}]


no host IPv6-address


Syntax Description

IPv6-address - IPV6 address prefix.

metric - Metric to be advertised.

area-id - A 32-bit integer.

Mode

Router Configuration

Example

SEFOS(config-router)# host 3ffe:481d::5 metric 10 area-id 0.0.0.1


Related Commands

8.1.18 no area

Deletes an area and does any one of the following based on the optional parameter.

Related Commands

8.1.19 no area - range

Deletes an area-range. This command operates similar to that of the command no area.


no area area-id range IPV6-prefix | prefix-length [{advertise | not-advertise}] [cost cost]


Syntax Description

area-id - Area identifier. This is a 32-bit integer.

IPv6-prefix - The IPv6 address prefix of the range.

prefix-length - The prefix length of the address range.

advertise - Flushes out all the routes (LSAs) falling in the range and generates aggregated LSA for the range.

not-advertise - Suppresses routes that match the prefix/prefix-length pair.

cost - Metric or cost for a summary route, which is used during OSPF SPF calculation to determine the shortest paths to the destination. This value ranges between 0 and 16777215.

Mode

Router Configuration

Example

SEFOS(config-router)# no area 1.1.1.1 range 3ffe:3010:481d::5 / 80

Notes

All the interfaces attached to an area must be deleted before deleting an area.


Related Commands

8.1.20 nssaAsbrDfRtTrans

This command enables setting of P bit in the default Type-7 LSA generated by an NSSA internal ASBR. The no form of the command disables setting of P bit in the default Type-7 LSA generated by an NSSA internal ASBR.


nssaAsbrDfRtTrans


no nssaAsbrDfRtTrans


Mode

Router Configuration

Defaults

Disabled

Example

SEFOS(config-router)# nssaAsbrDfRtTrans


Related Commands

8.1.21 redist-config

Configures the information to be applied to routes learnt from RTM. The no form of the command deletes the information applied to routes learnt from RTM.


redist-config IPv6-prefix prefix-length [metric-value metric] [metric-type {asExttype1 | asExttype2}] [tag tag-value] 


no redist-config IPv6-prefix prefix-length


Syntax Description

IPv6-prefix - The IPv6 address prefix.

prefix-length - The prefix length of the address.

metric-value - The metric value applied to the route before it is advertised into the OSPFv3 Domain.

metric-type - The metric type applied to the route before it is advertised into the OSPFv3 Domain.

tag - The tag type describes whether tags will be automatically generated or will be manually configured.

Mode

Router Configuration

Example

SEFOS(config-router)# redist-config 3ffe:5000:481d::5 80 metric-value 30 metric-type asExttype1 tag 12


Related Commands

8.1.22 as-external lsdb-limit

Sets the maximum number of non-default AS-external-LSA entries that can be stored in the link-state database. If the value is -1, then there is no limit.


as-external lsdb-limit lsdb-limit_-1-0x7fffffff


Mode

Router Configuration

Defaults

lsdb-limit - -1

Example

SEFOS(config-router)# as-external lsdb-limit 10

Notes

  • When the number of non-default AS-external-LSAs in a router’s link-state database reaches the configured limit, the router enters Overflow- State. The router never holds more than the configured non-default AS-external-LSAs in its database.
  • The LSDB limit MUST be set identically in all routers attached to the OSPFv3 backbone and/or any regular OSPFv3 area. (i.e. OSPFv3 stub areas and NSSAs are excluded).

Related Commands

8.1.23 exit-overflow-interval

Sets the number of seconds after which a router will attempt to leave the overflow state.


exit-overflow-interval interval


Mode

Router Configuration

Defaults

interval - 0

Example

SEFOS(config-router)# exit-overflow-interval 10


Related Commands

8.1.24 demand-extensions

Enables routing support for demand routing. The no form of the command disables routing support for demand routing.


demand-extensions


no demand-extensions


Mode

Router Configuration

Defaults

Enabled.

Example

SEFOS(config-router)# demand-extensions


Related Commands

8.1.25 reference-bandwidth

Sets the reference bandwidth in kilobits per second for calculating the default interface metrics.


reference-bandwidth ref-bw


Mode

Router Configuration

Defaults

ref-bw - 100,000 KBPS

Example

SEFOS(config-router)# reference-bandwidth 1000000


Related Commands

8.1.26 auto-cost reference-bandwidth

Sets the reference bandwidth in kilobits per second for calculating the default interface metrics. The no form of the command sets the reference bandwidth to the default value. This command operates similar to that of the command reference-bandwidth.


auto-cost reference-bandwidth ref-bw


no auto-cost reference-bandwidth


Syntax Description

ref-bw - Reference bandwidth (in kilobits per second) for calculating the default interface metrics.

Mode

Router Configuration

Defaults

ref-bw - 100,000 kbps.

Example

SEFOS(config-router)# auto-cost reference-bandwidth 1000000


Related Commands

8.1.27 ipv6 ospf area

Enables OSPFv3 for IPv6 on an interface. The no form of the command disables OSPFv3 routing protocol on the interface.


ipv6 ospf area IPv4-address


no ipv6 ospf


Syntax Description

IPv4-address - A 32-bit integer.

Mode

Router Configuration

Defaults

Disabled.

Example

SEFOS(config-if)# ipv6 ospf area 0.0.0.0

Notes

The no form of the command disables an interface and triggers flushing of self-originated link scope LSAs, and deletes the link scope LSAs associated with this interface from the link state database. If there is a single interface in the associated area, then this command deletes its area scope LSAs from the link state database.


Related Commands

8.1.28 ipv6 ospf demand-circuit

Configures OSPFv3 to treat the interface as an OSPFv3 demand circuit. The command indicates whether demand OSPFv3 procedures (hello suppression to FULL neighbors and setting the DoNotAge flag on propagated LSAs) must be performed on the configured interface. The no form of the command disables the demand circuit on an interface.


ipv6 ospf demand-circuit


no ipv6 ospf demand-circuit


Mode

Interface Configuration

Applicable only in VLAN Interface.

Defaults

Disabled.

Example

SEFOS(config-if)# ipv6 ospf demand-circuit

Notes

The routing support for demand routing must have been enabled (using the demand-extensions command) prior to the execution of this command.


Related Commands

8.1.29 ipv6 ospf retransmit-interval

Sets the time between LSA retransmissions for adjacencies belonging to interface. The no form of the command sets the default retransmit interval for an interface.


ipv6 ospf retransmit-interval interval


no ipv6 ospf retransmit-interval


Syntax Description

Interface Configuration

Applicable only in VLAN Interface.

Mode

Router Configuration

Defaults

interval - 5

Example

SEFOS(config-if)# ipv6 ospf retransmit-interval 10

Notes

The retransmit time interval is the number of seconds between the link-state advertisement retransmissions for adjacencies belonging to an interface. The retransmit-interval value is also used while retransmitting database description and link-state request packets.


Related Commands

8.1.30 ipv6 ospf transmit-delay

Sets the estimated time taken to transmit LS update packet over a particular interface. The no form of the command sets the default transmit delay for an interface.


ipv6 ospf transmit-delay 1-1800


no ipv6 ospf transmit-delay


Mode

Interface Configuration

Applicable only in VLAN Interface.

Defaults

delay - 1

Example

SEFOS(config-if)# ipv6 ospf transmit-delay 10


Related Commands

8.1.31 ipv6 ospf priority

Sets the router priority, which helps to determine the designated router for this network. The no form of the command sets the default router priority for an interface.


ipv6 ospf priority 1-255


no ipv6 ospf priority


Mode

Interface Configuration

Applicable only in VLAN Interface.

Defaults

priority - 1

Example

SEFOS(config-if)# ipv6 ospf priority 7

Notes

A priority value of 0 signifies that the router is not eligible to become the designated router on a particular network.


Related Commands

8.1.32 no ipv6 ospf priority

Sets the default router priority for an interface. This command operates similar to that of the command ipv6 ospf priority.


no ipv6 ospf priority priority-value


Syntax Description

priority-value - Priority value of the router. A priority value of 0 signifies that the router is not eligible to become the designated router on a particular network.

Mode

Interface Configuration

Applicable only in VLAN Interface.

Defaults

priority - 1

Example

SEFOS(config-if)# no ipv6 ospf priority 7


Related Commands

8.1.33 ipv6 ospf hello-interval

Specifies the time interval between the OSPFv3 hello packets on a particular interface (the length of time, in seconds, between the Hello packets that the router sends on the interface). The no form of the command sets the default hello interval for an interface.


ipv6 ospf hello-interval seconds_1-65535


no ipv6 ospf hello-interval


Mode

Interface Configuration

Applicable only in VLAN Interface.

Defaults

interval - 10

Example

SEFOS(config-if)# ipv6 ospf hello-interval 20

Notes

The hello interval value must be same for all routers attached to a common link.


Related Commands

8.1.34 ipv6 ospf dead-interval

Configures the router dead interval. The command is configured in seconds and indicates the time period for which the router waits for hello packet from the neighbor before declaring this neighbor down. The no form of the command sets the interface dead interval to default value.


ipv6 ospf dead-interval seconds_1-65535


no ipv6 ospf dead-interval


Mode

Interface Configuration

Applicable only in VLAN Interface.

Defaults

interval - 40

Example

SEFOS(config-if)# ipv6 ospf dead-interval 50

Notes

This value must be a multiple of the hello interval and must be same for all routers attached to a common link.


Related Commands

8.1.35 ipv6 ospf poll-interval

Configures the larger time interval, in seconds, between the hello packets sent to an inactive non-broadcast multi-access neighbor. The no form of the command sets the default poll interval for an interface.


ipv6 ospf poll-interval seconds_1-65535


no ipv6 ospf poll-interval


Mode

Interface Configuration

Applicable only in VLAN Interface.

Defaults

interval - 120

Example

SEFOS(config-if)# ipv6 ospf poll-interval 30


Related Commands

8.1.36 ipv6 ospf metric

Explicitly specifies the metric value for sending a packet on an interface. The no form of the command sets the default value for the interface metric.


ipv6 ospf metric 1-65535


no ipv6 ospf metric


Mode

Interface Configuration

This command is applicable only in VLAN Interface.

Defaults

metric - 10

Example

SEFOS(config-if)# ipv6 ospf metric 20


Related Commands

8.1.37 ipv6 ospf network

Sets the network type for an interface. The no form of the command sets the default value for the network type.


ipv6 ospf network {broadcast | non-broadcast | point-to-multipoint | point-to-point}


no ipv6 ospf network


Syntax Description

broadcast - Networks supporting many (more than two) attached routers, together with the capability to address a single physical message to all of the attached routers (broadcast).

non-broadcast - Networks supporting many (more than two) routers, but having no broadcast capability.

point-to-multipoint - Treats the non-broadcast network as a collection of point-to-point links.

point-to-point - A network that joins a single pair of routers.

Mode

Interface Configuration

Applicable only in VLAN Interface.

Defaults

broadcast

Example

SEFOS(config-if)# ipv6 ospf network non-broadcast

Notes

  • If the Interface Network type is NBMA or Point-to-Multipoint, neighbor must be configured.
  • When there are few configured neighbors on the interface, then both network type change command and the no form of the command do not succeed.

Related Commands

8.1.38 ipv6 ospf neighbor

Configures a neighbor on non-broadcast networks and sets the priority value for the neighbor if specified. The no form of the command deletes a configured neighbor or sets the default priority value (if the priority option is specified).


ipv6 ospf neighbor IPv6-address [priority 1-255]


no ipv6 ospf neighbor IPv6-address [priority 1-255]


Syntax Description

IPv6-address - IPv6 Address prefix.

priority - A number that specifies the router priority.

Mode

Interface Configuration

Applicable only in VLAN Interface.

Defaults

priority - 1

Example

SEFOS(config-if)# ipv6 ospf neighbor fe80::220:35ff:fe43:6020 priority 2

Notes

  • In the OSPFv3 protocol packets, the IPv6 address indicates the source address of the neighbor. The link local address of the neighbor must be used for this field.
  • Neighbors can be configured only in NBMA networks and point-to-multipoint networks.

Related Commands

8.1.39 ipv6 ospf passive-interface

Configures an OSPFv3 interface to be passive. The execution of the command results in suppressing OSPFv3 protocol packets traffic on this interface. The no form of the command configures an OSPFv3 interface to be non-passive.


ipv6 ospf passive-interface


no ipv6 ospf passive-interface


Mode

Interface Configuration

Applicable only in VLAN Interface.

Defaults

Disabled

Example

SEFOS(config-if)# ipv6 ospf passive-interface


Related Commands

8.1.40 ipv6 ospf neighbor probing

Enables neighbor probing on demand-circuit enabled interface. The no form of the command disables neighbor probing on demand-circuit enabled interface.


ipv6 ospf neighbor probing


no ipv6 ospf neighbor probing


Mode

Interface Configuration

Applicable only in VLAN Interface.

Defaults

Disabled.

Example

SEFOS(config-if)# ipv6 ospf neighbor probing


Related Commands

8.1.41 ipv6 ospf neighbor-probe retransmit-limit

Sets the number of consecutive LSA retransmissions before the neighbor is deemed inactive. The no form of the command sets the default neighbor probe retransmission limit.


ipv6 ospf neighbor-probe retransmit-limit retrans-limit


no ipv6 ospf neighbor-probe retransmit-limit


Mode

Interface Configuration

Applicable only in VLAN Interface.

Defaults

retrans-limit - 10

Example

SEFOS(config-if)# ipv6 ospf neighbor-probe retransmit-limit 30


Related Commands

8.1.42 ipv6 ospf neighbor-probe interval

Sets the number of seconds, that indicates how often neighbor will be probed. The no form of the command sets the default neighbor probe interval.


ipv6 ospf neighbor-probe interval interval


no ipv6 ospf neighbor-probe interval


Mode

Interface Configuration

Applicable only in VLAN Interface.

Defaults

interval - 120

Example

SEFOS(config-if)# ipv6 ospf neighbor-probe interval 200


Related Commands

8.1.43 debug ipv6 ospf - pkt

Sets the trace levels.


debug ipv6 ospf [pkt ([{high | low | hex}] [hp] [ddp] [lrq] [lsu] [lsa])] [level ([fn_entry] [fn_exit] [critical] [mem_alloc_succ] [mem_alloc_fail])] [module ([ppp] [rtm] [nssa] [rt_aggrg] [adj_formation] [lsdb]  [ism] [nsm] [rt_calc] [interface] [config])]


no debug ipv6 ospf [ pkt  ([{high | low | hex}] [hp] [ddp] [lrq] [lsu] [lsa])] [level ([fn_entry] [fn_exit] [critical] [mem_alloc_succ]  [mem_alloc_fail])] [module ([ppp] [rtm] [nssa] [rt_aggrg] [adj_formation] [lsdb] [ism] [nsm] [rt_calc] [interface] [config])]


Syntax Description

pkt - Packet high level dump debug messages.

high - Packet high level dump trace.

low - Packet low level dump trace.

hex - Packet hex dump trace.

hp - Hello packet trace.

ddp - DDP packet trace.

lrq - Link state request packet trace.

lsu - Link state update packet trace.

lsa - Link state acknowledge packet trace.

level - Trace level debug messages.

fn_entry - Function entry trace.

fn_exit - Function exit trace.

critical - Critical trace.

mem_alloc_succ - Memory allocation success trace.

mem_alloc_fail - Memory allocation failure trace.

module - OSPFv3 module debug messages.

ppp - Protocol packet processing trace.

rtm - RTM module trace.

nssa - NSSA trace.

Mode

Privileged EXEC

Defaults

Debugging is disabled.

Example

SEFOS# debug ipv6 ospf pkt high hp level fn_entry module ppp


Related Commands

8.1.44 debug ipv6 ospf

Sets the IPv6 OSPF trace levels. The no form of the command resets the IPv6 OSPF trace levels. This command operates similar to the command debug ipv6 ospf - pkt.


debug ipv6 ospf {adj | ipsec | database-timer | flood | hello | lsa-gen | retransmission | lsdb | spf statistic}


no debug ipv6 ospf {adj | ipsec | database-timer | flood | hello | lsa-gen | retransmission | lsdb}


Syntax Description

adj - Adjacency information.

ipsec - The interaction between OSPF and IPSec in IPv6 networks, including creation and removal of policy definitions.

database-timer - Database-timer information.

flood - Flooding information.

hello - Hello packet information.

lsa-gen - Link-state advertisement (LSA) generation information for all LSA types.

retransmission - Retransmission information.

lsdb - Link state database information.

spf statistic - Shortest path first statistics information.

Mode

Privileged EXEC

Defaults

Debugging is disabled.

Example

SEFOS# debug ipv6 ospf adj


Related Commands

8.1.45 debug ipv6 ospf - packet | events

Sets the IPv6 OSPF event trace. The no form of the command resets the IPv6 OSPF event trace. This command operates similar to that of the command debug ipv6 ospf - pkt.


debug ipv6 ospf {packet | events}


no debug ipv6 ospf {packets | events}


Syntax Description

packet - Received OSPFv3 packet information.

events - OSPFv3-related events information.

Mode

Privileged EXEC

Defaults

Debugging is disabled.

Example

SEFOS# debug ipv6 ospf adj


Related Commands

8.1.46 show ipv6 ospf interface

Displays the OSPFv3-related interface information.


show ipv6 ospf interface [vlan 1-4094]


Syntax Description

vlan - VLAN identifier.

Mode

User/Privileged EXEC

Example

SEFOS# show ipv6 ospf interface vlan 1

 

OSPFv3 Interface Information

 

Interface Name: vlan2 Interface Id: 1 Area Id: 0.0.0.0

 

Local Address: fe80::211:22ff:fe33:4412 Router Id: 11.0.0.2

Network Type: BROADCAST Cost: 10 State: WAITING

 

Designated Router Id: 0.0.0.0 local address: (null)

 

Backup Designated Router Id: 0.0.0.0 local address: (null)

 

Transmit Delay: 1 sec Priority: 1 IfOptions: 0x0

 

Timer intervals configured:

Hello: 10, Dead: 40, Retransmit: 5, Poll: 120

Demand Circuit: Disable Neighbor Probing: Disable

 

Nbr Probe Retrans Limit: 10 Nbr Probe Interval: 120

 

Hello due in 4 sec

Neighbor Count is: 1

Adjacent with the neighbor 11.0.0.1


Related Commands

8.1.47 show ipv6 ospf neighbor

Displays OSPFv3 neighbor information.


show ipv6 ospf neighbor [neighbor-router-id]


Mode

User or Privileged EXEC

Example

SEFOS# show ipv6 ospf neighbor

 

ID PriStateDead Address

Time

11.0.0.41FULL/PTOP 31 fe80::211:22ff:fe33:4434

11.0.0.510FULL/BACKUP 35 fe80::260:83ff:fe38:8aa2


Related Commands

8.1.48 show ipv6 ospf - request/retrans-list

Displays the list of all LSAs in request-list or in retransmission-list.


show ipv6 ospf {request-list | retrans-list} [neighbor-router-id]


Syntax Description

request-list - The list of link state advertisements for which the neighbor has more up-to-date instances.

retrans-list - The list of link state advertisements that have been sent but not acknowledged.

neighbor-router-id - Neighbor router identifier.

Mode

User/Privileged EXEC

Example

SEFOS# show ipv6 ospf retrans-list

 

NeighborId 20.0.0.3, Nbr Address fe80::220:35ff:fe43:6020

Type LsId AdvRtr SeqNo Age Checksum

0x2001 0.0.0.2 11.0.0.2 0x80000011 0 0xcddf

 

SEFOS# show ipv6 ospf request-list

 

Neighbor 20.0.0.3, Address fe80::220:35ff:fe43:6020

Type LSID ADVRTR SeqNo Age Checksum

8193 0.0.0.1 11.0.0.3 0x80000002 6 0x1211


8.1.49 show ipv6 ospf virtual-links

Displays the parameters and the current state of OSPFv3 virtual links.


show ipv6 ospf virtual-links


Mode

User or Privileged EXEC

Example

SEFOS# show ipv6 ospf virtual-links

 

Interface State: PointToPoint, Neighbor State: FULL

Transit Area: 2.2.2.2, Virtual Neighbor: 11.0.0.7

Intervals Configured for the Virtual Interface:

Hello: 10, Dead: 60, Transit: 1, Retransmit : 20


Related Commands

8.1.50 show ipv6 ospf border-routers

Displays the internal OSPFv3 routing table entries to an ABR or ASBR.


show ipv6 ospf border-routers


Mode

User or Privileged EXEC

Example

SEFOS# show ipv6 ospf border-routers

 

OSPFv3 Process Border Router Information

 

Destination Type NextHop Cost Rt Area Type Id

11.0.0.2 ABR fe80::211:22ff:fe33:4412 10 intraArea 0.0.0.0

11.0.0.2 ABR fe80::211:22ff:fe33:4422 10 intraArea 0.0.0.1

11.0.0.2 ASBR fe80::211:22ff:fe33:4412 10 intraArea 0.0.0.0

11.0.0.2 ASBR fe80::211:22ff:fe33:4422 10 intraArea 0.0.0.0


Related Commands

8.1.51 show ipv6 ospf - area-range / summary-prefix

Displays either the list of all area address ranges information or all external summary address configuration information.


show ipv6 ospf {area-range | summary-prefix}


Syntax

area-range - Area associated with the OSPFv3 address range.

summary-prefix - Aggregate addresses for OSPFv3.

Mode

User or Privileged EXEC

Example

SEFOS# show ipv6 ospf area-range

 

OSPFv3 Summary Address Configuration Information

Network Pfx LSA Area Effect Tag

Length Type

3ffe::100:0:0:0 80 Summary 0.0.0.0 advertise 0

3ffe::110:0:0:0 80 Summary 0.0.0.0 doNotAdvertise 0

3ffe::120:0:0:0 80 Summary 0.0.0.1 advertise 0

3ffe::130:0:0:0 80 Type7 0.0.0.1 advertise 0

 

SEFOS# show ipv6 ospf summary-prefix

 

OSPFv3 External Summary Address Configuration Information

 

Prefix Pfx Area-id Effect TranslationState

Length

3ffe::200:0:0:0 80 0.0.0.0 advertise enabled

3ffe::210:0:0:0 80 0.0.0.0 advertise disabled

3ffe::220:0:0:0 80 0.0.0.0 doNotAdvertise enabled

3ffe::230:0:0:0 80 0.0.0.0 allowAll enabled

3ffe::240:0:0:0 80 0.0.0.0 denyAll enabled


Related Commands

8.1.52 show ipv6 ospf - General Information

Displays general information about OSPFv3 routing process.


show ipv6 ospf


Mode

User or Privileged EXEC

Example

SEFOS# show ipv6 ospf

 

Router Id: 11.0.0.1 ABR Type: Standard ABR

SPF schedule delay: 5 secs Hold time between two SPFs: 10 secs

Exit Overflow Interval: 0 Ref BW: 100000000 Ext Lsdb Limit: -1

Trace Value: 0x00000800 As Scope Lsa: 0 Checksum Sum: 0x0

Demand Circuit: Enable Passive Interface: Disable

Nssa Asbr Default Route Translation: Disable

Autonomous System Boundary Router

Number of Areas in this router 2

Area 0.0.0.0

Number of interfaces in this area is 1

Number of Area Scope Lsa: 4 Checksum Sum: 0x1210e

Number of Indication Lsa: 0 SPF algorithm

executed: 6 times

Area 0.0.0.1

Number of interfaces in this area is 1

Number of Area Scope Lsa: 3 Checksum Sum: 0x18d41

Number of Indication Lsa: 0 SPF algorithm

executed: 2 times


Related Commands

8.1.53 show ipv6 ospf - LSA Database

Displays the LSA information.


show ipv6 ospf [area area-id] database [{router | network | as-external | inter-prefix | inter-router | intra-prefix | link | nssa}] [{detail | HEX}]


Syntax Description

area - A 32-bit integer.

database - Displays the number of each type of LSA for each area in the database.

router - Router LSAs.

network - Network LSAs.

as-external - AS-external LSAs.

inter-prefix - Inter-prefix LSAs.

inter-router - Inter-router LSAs.

intra-prefix - Intra-prefix LSAs.

link - Link State LSAs.

nssa - NSSA LSAs.

detail - Displays the LSAs information in detail.

HEX - Displays the LSAs information in hexadecimal format.

Mode

User/Privileged EXEC

Example

SEFOS# show ipv6 ospf database

 

Area-id RtrId LsaType Age Seq# Checksum

0.0.0.0 11.0.0.1 0x0008 300 0x80000002 0x323f

0.0.0.0 11.0.0.2 0x0008 300 0x80000001 0xa426

0.0.0.0 11.0.0.1 0x2001 1 0x80000003 0x3b9a

 

0.0.0.0 11.0.0.2 0x2001 0 0x80000006 0x2fa2

0.0.0.0 11.0.0.2 0x2002 0 0x80000001 0x6081

0.0.0.0 11.0.0.2 0x2009 0 0x80000002 0x504c

 

SEFOS# show ipv6 ospf database detail

 

Age: 0 Seconds LS Type: Router Lsa

Link State Id: 0.0.0.0 Adv Rtr Id: 12.0.0.2

Sequence: 0x80000001 Checksum: 0x7c85 Length: 24

Router is an AS Boundary Router

Number of Links: 0 Options: 0x33

 

Age: 0 Seconds LS Type: Intra Area Prefix Lsa

Link State Id: 0.0.0.0 Adv Rtr Id: 12.0.0.2

Sequence: 0x80000001 Checksum: 0x4966 Length: 52

#Prefixes: 1 Referenced LS Type: Router Lsa

Ref Link State Id: 0.0.0.0 Ref Adv Router: 12.0.0.2

Prefix Length (Bytes): 16 Prefix Options: 0x00

Metric: 0xa

Prefix: 3ffe:481d::5

 

SEFOS# show ipv6 ospf database hex

 

00 00 00 08 00 00 00 02 0b 00 00 01 80 00 00 02 e9 d0 00 2c 01 00 00 33 fe 80 00

00 00 00 00 00 02 11 22 ff fe 33 44 21 00 00 00 00

00 07 00 08 00 00 00 02 0b 00 00 02 80 00 00 02 f9 be 00 2c 01 00 00 33 fe 80 00

00 00 00 00 00 02 11 22 ff fe 33 44 22 00 00 00 00

 

00 00 20 01 00 00 00 00 0b 00 00 01 80 00 00 01 fe e2 00 28 00 00 00 33 01 00 00

02 00 00 00 02 00 00 00 02 0b 00 00 02

00 06 20 01 00 00 00 00 0b 00 00 02 80 00 00 03 e7 f4 00 28 03 00 00 33 01 00 00

02 00 00 00 02 00 00 00 02 0b 00 00 01


8.1.54 show ipv6 ospf route

Displays routes learned by the OSPFv3 process.


show ipv6 ospf route


Mode

User or Privileged EXEC

Example

SEFOS# show ipv6 ospf route

 

OSPFV3 Process Routing Table

Dest/Prefix-Length NextHop/IfIndex Cost Rt.Type Area

3333::/96 fec0::4444:0:2/vlan4 10 type2Ext 0.0.0.0

fec0::3003:0:0/96 :: /vlan5 1 intraArea 0.0.0.4

fec0::4444:0:0/96 :: /vlan4 1 intraArea 0.0.0.3


Related Commands

8.1.55 show ipv6 ospf areas

Displays the area table.


show ipv6 ospf areas


Mode

Useror Privileged EXEC

Example

SEFOS# show ipv6 ospf areas

 

OSPFV3 AREA CONFIGURATION INFORMATION

 

AreaId: 0.0.0.0 Area Type: NORMAL AREA

Spf Calculation: 3 (times) Area Bdr Rtr Count: 1

As Bdr Rtr Count: 0 Area Summary: Send Summary

 

Area-id: 0.0.0.1 Area Type: NSS AREA

Spf Calculation: 0 (times) Area Bdr Rtr Count: 1

As Bdr Rtr Count: 0 Area Summary: Send Summary

Stub Metric: 0x1 Stub Metric Type: 1

Translator Role: Candidate Translator State: Disabled

Nssa Stability Interval: 40


Related Commands

8.1.56 show ipv6 ospf host

Displays the host table information.


show ipv6 ospf host


Mode

User/Privileged EXEC

Example

SEFOS# show ipv6 ospf host

 

OSPFv3 HOST CONFIGURATION Information

Address Area-id StubMetric

3ffe::80:0:1 0.0.0.0 30


Related Commands

8.1.57 show ipv6 ospf redist-config

Displays the configuration information to be applied to the routes learnt from the RTM.


show ipv6 ospf redist-config


Mode

User/Privileged EXEC

Example

SEFOS# show ipv6 ospf redist-config

 

Address Prefix PfxLength MetricType Metric TagType TagValue

3ffe:: 64 asExt Type2 10 manual 10


Related Commands

 

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