Cisco WS-C3550-12G Software Configuration Manual page 671

Chapter 25 Configuring MSDP
Figure 25-2 Default MSDP Peer Network
Default MSDP peer
Beginning in privileged EXEC mode, follow these steps to specify a default MSDP peer:
Command
Step 1 configure terminal
Step 2 ip msdp default-peer ip-address | name
[prefix-list list]
78-11194-03
Router A
ISP A PIM domain
SA
SA
SA
Multilayer
Si
Switch B
Default MSDP peer
Customer PIM domain
Purpose
Enter global configuration mode.
Define a default peer from which to accept all MSDP SA messages.
• For ip-address | name, enter the IP address or Domain Name
System (DNS) server name of the MSDP default peer.
• (Optional) For prefix-list list, enter the list name that specifies the
peer to be the default peer only for the listed prefixes. You can have
multiple active default peers when you have a prefix list associated
with each.
When you enter multiple ip msdp default-peer commands with the
prefix-list keyword, you use all the default peers at the same time
for different RP prefixes. This syntax is typically used in a service
provider cloud that connects stub site clouds.
When you enter multiple ip msdp default-peer commands without
the prefix-list keyword, a single active peer accepts all SA
messages. If that peer fails, the next configured default peer accepts
all SA messages. This syntax is typically used at a stub site.
Catalyst 3550 Multilayer Switch Software Configuration Guide
Router C
Default MSDP peer
ISP C PIM domain
10.1.1.1
Configuring MSDP
25-5