Configure Dynamic Multicast Learning

By default, GMRP is enabled globally and can be enabled or disabled on a per-port basis. If GMRP is disabled globally in the switch, use the set gmrp enable command to enable GMRP globally, or use the set port gmrp id enable command. If GMRP is disabled globally or on a specific port, dynamic multicast learning will not take place globally or on that port. By default, all of the ports in a switch are created (but only port 0/1 is up) and added as member ports of the default VLAN, vlan 1. See Default Settings for the example topology for this procedure.

1. Retrieve the current GMRP status.

   SEFOS# show vlan device info
    Vlan device configurations
    --------------------------
   Vlan Status                       : Enabled
   Vlan Oper status                  : Enabled
   Gvrp status                       : Enabled
   Gmrp status                       : Enabled
   Gvrp Oper status                  : Enabled
   Gmrp Oper status                  : Enabled
   Mac-Vlan Status                   : Disabled
   Subnet-Vlan Status                : Disabled
   Protocol-Vlan Status              : Enabled
   Bridge Mode                       : Customer Bridge
   Base-Bridge Mode                  : Vlan Aware Bridge
   Traffic Classes                   : Enabled
   Vlan Operational Learning Mode    : IVL
   Version number                    : 1
   Max Vlan id                       : 4094
   Max supported vlans               : 4094
   Unicast mac learning limit        : 16334

2. Retrieve the GMRP value on the current port.

   SEFOS# show vlan port config port ex 0/3
   Vlan Port configuration table
    --------------------------
   Port Ex0/3
   Port Vlan ID                        : 1
   Port Acceptable Frame Type          : Admit All
   Port Ingress Filtering              : Disabled
   Port Mode                           : Hybrid
   Port Gvrp Status                    : Enabled
   Port Gmrp Status                    : Enabled
   Port Gvrp Failed Registrations      : 0
   Gvrp last pdu origin                : 00:00:00:00:00:00
   Port Restricted Vlan Registration   : Disabled
   Port Restricted Group Registration  : Disabled
   Mac Based Support                   : Disabled
   Subnet Based Support                : Disabled
   Port-and-Protocol Based Support     : Enabled
   Default Priority                    : 0
   Filtering Utility Criteria          : Default
   Port Protected Status               : Disabled
   -------------------------------------------------------

   If the switch has not been rebooted, global or port GRMP status might be disabled.

3. Disable GMRP in switch B.

   SEFOS# configure terminal
   SEFOS(config)# set gmrp disable
   SEFOS(config)# end

4. In switch A, configure the static multicast MAC address.

   SEFOS# configure terminal
   SEFOS(config)# interface extreme-ethernet 0/3
   SEFOS(config-if)# no shutdown
   SEFOS(config-if)# exit
   SEFOS(config)# mac-address-table static multicast 01:02:03:04:05:06 vlan 1 interface extreme-ethernet 0/3

5. Review the MAC address table details in switch A.

   SEFOS# show mac-address-table static multicast
   Static Multicast Table
   ----------------------
   VLAN            : 1
   Mac Address     : 01:02:03:04:05:06
   Receive Port    : 
   Member Ports    : Ex0/3
   Forbidden Ports :
   Status          : Permanent
   ---------------------------------------
   Total Mac Addresses displayed: 1

6. Review the MAC address table details by in switch B.

   SEFOS# show mac-address-table
   VLAN    Mac Address         Type     Ports
   ----    -----------         ----     -----
   1       00:01:02:03:04:02   Learnt   Ex0/3 (Switch A, port Ex0/3 Mac addr)
   Total Mac Addresses displayed: 1

7. Enable GMRP globally in switch B, and review the MAC address table details.

   SEFOS# configure terminal
   SEFOS(config)# set gmrp enable
   SEFOS# show mac-address-table
   VLAN    Mac Address         Type     Ports
   ----    -----------         ----     -----
   1       00:01:02:03:04:02   Learnt   Ex0/3 (Switch A, port Ex0/3 Mac addr)
   1       01:02:03:04:05:06   Learnt   Ex0/3
   Total Mac Addresses displayed: 2