• PIM sparse-mode domains can rely only on their own RPs, decreasing reliance on RPs in another domain. This increases security because you can prevent your sources from being known outside your domain. • Domains with only receivers can receive data without globally advertising group membership. • Global source multicast routing table state is not required, saving memory. How to Configure MSDP Default MSDP Configuration MSDP is not enabled, and no default MSDP peer exists. Configuring a Default MSDP Peer Before you begin Configure an MSDP peer. Procedure Configuring MSDP How to Configure MSDP Command or Action Purpose Step 1 enable Example: Device>enable Enables privileged EXEC mode.
• Enter your password if prompted. Step 2 configure terminal Example: Device#configure terminal Enters global configuration mode. Step 3 ip msdp default-peer ip-address | name [prefix-list list] Example: Device(config)#ip msdp default-peer 10.1.1.1 prefix-list site-a Defines 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. Configuring MSDP 4