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Catalyst 3550 Multilayer Switch Software Configuration Guide
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Chapter 35 Configuring MSDP
Configuring MSDP
Redistributing Sources
SA messages are originated on RPs to which sources have registered. By default, any source that
registers with an RP is advertised. The A flag is set in the RP when a source is registered, which means
the source is advertised in an SA unless it is filtered.
Beginning in privileged EXEC mode, follow these steps to further restrict which registered sources are
advertised:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
ip msdp redistribute [list
access-list-name] [asn
aspath-access-list-number] [route-map
map]
Configure which (S,G) entries from the multicast routing table are
advertised in SA messages.
By default, only sources within the local domain are advertised.
• (Optional) For list access-list-name, enter the name or number of an
IP standard or extended access list. The range is 1 to 99 for standard
access lists and 100 to 199 for extended lists. The access list
controls which local sources are advertised and to which groups
they send.
• (Optional) For asn aspath-access-list-number, enter the IP standard
or extended access list number in the range 1 to 199. This access list
number must also be configured in the ip as-path access-list
command.
• (Optional) For route-map map, enter the IP standard or extended
access list number in the range 1 to 199. This access list number
must also be configured in the ip as-path access-list command.
The access list or autonomous system path access list determines which
(S,G) pairs are advertised.
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