Configuration Guide User guide

1566 FastIron Configuration Guide
53-1002494-02
Multicast Source Discovery Protocol (MSDP)
NOTE
The default filter action is deny. If you want to permit some source-group pairs, use a route map. A
permit action in the route map allows the Layer 3 switch to receive the matching source-group pairs.
A deny action in the route map drops the matching source-group pairs.
Filtering advertised source-active messages
The following example configures the Layer 3 switch to advertise all source-group pairs except the
ones that have source address 10.x.x.x.
Example of configuring source Active (SA) filters
The following commands configure an IP address on port 3/1. This is the port on which the MSDP
neighbors will be configured.
Brocade(config)# interface ethernet 3/1
Brocade(config-if-3/1)# ip address 2.2.2.98/24
Brocade(config-if-3/1)# exit
The following commands configure a loopback interface. The Layer 3 switch will use this interface
as the source address for communicating with the MSDP neighbors.
Brocade(config)# interface loopback 1
Brocade(config-lbif-1)# ip address 9.9.9.8/32
Brocade(config-lbif-1)# exit
The following command configures an extended ACL to specify the source and group addresses you
want to filter.
Brocade(config)# access-list 123 permit 10.0.0.0 0.255.255.255 any
The following commands configure a route map. The map matches on source address 10.x.x.x and
any group address. Since the action is deny, the Source-Active filter that uses this route map will
remove the source-group pairs that match this route map from the Source-Active messages to the
neighbor.
Brocade(config)# route-map msdp_map deny 1
Brocade(config-routemap msdp_map)# match ip address 123
Brocade(config-routemap msdp_map)# exit
The following commands enable MSDP and configure MSDP neighbors.
Brocade(config)# router msdp
Brocade(config-msdp-router)# msdp-peer 2.2.2.99 connect-source loopback 1
Brocade(config-msdp-router)# msdp-peer 2.2.2.97 connect-source loopback 1
Brocade(config-msdp-router)# exit
The following commands configure the Source-Active filter.
Brocade(config)# router msdp
Brocade(config-msdp-router)# sa-filter originate route-map msdp_map
This filter removes source-group pairs that match route map msdp_map from Source-Active
messages before sending them to MSDP neighbors.
Syntax: [no] sa-filter originate [route-map <map-tag>]