Foundry Networks FESX User Manual

Foundry Configuration Guide for the FESX, FSX, and FWSX
19 - 38 © Foundry Networks, Inc. December 2005
Example
The following commands configure an IP address on port 3/1. This is the port on which the MSDP neighbors will
be configured.
FastIron SuperX Router(config)# interface ethernet 3/1
FastIron SuperX Router(config-if-3/1)# ip address 2.2.2.98/24
FastIron SuperX Router(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.
FastIron SuperX Router(config)# interface loopback 1
FastIron SuperX Router(config-lbif-1)# ip address 9.9.9.8/32
FastIron SuperX Router(config-lbif-1)# exit
The following command configures an extended ACL to specify the source and group addresses you want to filter.
FastIron SuperX Router(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.
FastIron SuperX Router(config)# route-map msdp_map deny 1
FastIron SuperX Router(config-routemap msdp_map)# match ip address 123
FastIron SuperX Router(config-routemap msdp_map)# exit
The following commands enable MSDP and configure MSDP neighbors on port 3/1.
FastIron SuperX Router(config)# router msdp
FastIron SuperX Router(config-msdp-router)# exit
FastIron SuperX Router(config)# interface ethernet 3/1
FastIron SuperX Router(config-if-3/1)# msdp-peer 2.2.2.99 connect-source loopback 1
FastIron SuperX Router(config-if-3/1)# msdp-peer 2.2.2.97 connect-source loopback 1
FastIron SuperX Router(config-if-3/1)# exit
The following commands configure the Source-Active filter.
FastIron SuperX Router(config)# router msdp
FastIron SuperX Router(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.
CLI Syntax
Syntax: [no] sa-filter originate [route-map <map-tag>]
The route-map <map-tag> parameter specifies a route map. The Layer 3 Switch applies the filter to source-group
pairs that match the route map. Use the match ip address <acl-id> command in the route map to specify an
extended ACL that contains the source and group addresses.
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.
Configuring MSDP Mesh Groups
A PIM Sparse domain can have several RPs that are connected to each other to form an MSDP mesh group. To
qualify as a mesh group, the RPs have to be fully meshed; that is, each RP must be connected to all peer RPs in
a domain. (See Figure 19.5.)
A mesh group reduces the forwarding of SA messages within a domain. Instead of having every RP in a domain
forward SA messages to all the RPs within that domain, only one RP forwards the SA message. Since an MSDP
mesh group is fully meshed, peers do not forward SA messages received in a domain from one member to every

Foundry Networks FESX Specifications

General

Brand	Foundry Networks
Model	FESX
Category	Switch
Language	English