The Cisco Multicast Source Discovery Protocol (MSDP) switch must be configured to limit the amount of source-active messages it accepts on a per-peer basis.

To reduce any risk of a denial-of-service (DoS) attack from a rogue or misconfigured MSDP switch, the switch must be configured to limit the number of source-active messages it accepts from each peer.

Review the switch configuration to determine if it is configured to limit the amount of source-active messages it accepts on a per-peer basis.

ip msdp peer x.1.28.2 connect-source Ethernet2/1 remote-as nn … … … ip msdp sa-limit x.1.28.2 nnn

If the switch is not configured to limit the source-active messages it accepts, this is a finding.

Configure the switch to limit the amount of source-active messages it accepts from each peer.

SW1(config)# ip msdp sa-limit x.1.28.2 nnn SW1(config)# end