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Netra Proxy Cache Server User's Manual

Chapter 8 Routing Administration

This chapter describes how to configure the Netra Proxy Cache Server as a router.

Note -

You cannot configure a host in a Netra Proxy Cache Array as a router in its standard configuration, in which the second network interface (hme1) is reserved for the use of the control network. To enable support for routing, you must add an additional network interface to the server. If you do this, you must take care that no packets are forwarded over the control network interface.

Routing is the mechanism by which systems on different networks can communicate with each other. Each network usually has at least one system called a router. A router is a system that is connected to multiple networks; it maintains information that defines routes between host systems and networks.

Netra System Routers

With the addition of one or more network interfaces, the Netra system can be configured as one of the following:

Dynamic Router

A dynamic router relies on information broadcast from other routers to update its routes and reflect changes in the network topology. It also broadcasts this information to other dynamic routers.

Dynamic routers are typically required when systems act as gateways between networks or within large networks where route information is constantly changing. The Netra server supports the following dynamic routing protocols:

If client host systems are required to use the dynamic router, they must either run programs that can communicate using these protocols or they must specify the dynamic router as a default router.

Static Router

A static router relies on the manual addition of routes. Routing information is not exchanged with other routers.

Static routers are typically used in very stable, simple networks.

If machines on the LAN require a static router, it must be specified as a default router.

Not a Router

A non-gateway system need not be a router in networks that already have dynamic routers. The Netra server listens for dynamic routers to broadcast route information using the RIP and the ICMP router discovery protocols.

Routing Procedures

Static Router

To Configure the Netra System as a Static Router

  1. Choose Network Connection Administration: Routing > Configure static router.

    The Static Router Administration page is displayed.

  2. Type the information in the form using Table 8-1.

    Table 8-1 Information Required for Static Routing

    Default Router Host Address  

    Host address of the default router for the network. 

    Destination Network/ 

    Host Address 

    Network/Host address to which information is routed. 

    Router Host Address 

    Host address of the router used for accessing the destination address.  

    Hop Count 

    A value of 0 or greater. 0 means the Netra server is the router; a value greater than 0 means that another system is the router. 

To Modify a Static Router

  1. Choose Network Connection Administration: Routing > Modify static router.

  2. Make the changes in the form using Table 8-1.

Note -

In certain Solaris versions, there is a complication for setting the destination address of a subnetwork with a trailing non-zero digit. To construct a network gateway on a non-zero subnetwork, the /etc/init.d/inetinit file must be manually edited to contain the information in the following form:

route add net 194.125.10.32 194.125.10.2 1 -netmask 255.255.255.224

The addresses given are for example only.

Dynamic Router

To Configure the Netra System as a Dynamic Router

  1. Choose Network Connection Administration: Routing>Configure dynamic router.

    The Dynamic Router Administration page is displayed.

  2. Type the information in the form using Table 8-2.

    Table 8-2 Information Required for Dynamic Routing

    Destination Network/ 

    Host Address  

    Network/Host address to which information is routed. 

    Gateway Host Address 

    Host address of the gateway used for accessing the destination address. If the router is unreachable when this form is configured then it is not used for routing until dynamic routing is reconfigured or the Netra system is restarted. 

    Hop Count 

    A value of 0 or greater. 0 means the Netra server is the router; a value greater than 0 means that another system is the router. 

    Status 

    Active or Passive. Gateways marked active are removed from the routing information if they become inaccessible. Gateways marked passive are part of the routing information until explicitly removed. Routes to passive gateways are also not broadcast to the other systems on the network.  

    Dynamic Routing Information over Point-to-Point Links? 

    Enables or disables RIP over PPP links. Choices: Yes or No 

To Modify a Dynamic Router

  1. Choose Network Connection Administration: Routing > Modify dynamic router.

  2. Make the changes in the form using Table 8-2.

Not a Router

To Configure the Netra System as Not a Router
Note -

Once the Netra server is already configured as "not a router," this option is not displayed.

  1. Choose Network Connection Administration: Routing > Turn off routing; then confirm the operation.

By default, the Netra Proxy Cache Server is not a router.