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V-216733

CAT III (Low)

The Cisco Multicast Source Discovery Protocol (MSDP) router must be configured to use a loopback address as the source address when originating MSDP traffic.

Rule ID

SV-216733r991901_rule

STIG

Cisco IOS XE Router RTR Security Technical Implementation Guide

Version

V3R5

CCIs

CCI-004931

Discussion

Using a loopback address as the source address offers a multitude of uses for security, access, management, and scalability of MSDP routers. It is easier to construct appropriate ingress filters for router management plane traffic destined to the network management subnet since the source addresses will be from the range used for loopback interfaces instead of a larger range of addresses used for physical interfaces. Log information recorded by authentication and syslog servers will record the router’s loopback address instead of the numerous physical interface addresses.

Check Content

Verify that the loopback interface is used as the source address for all MSDP packets generated by the router.

ip msdp peer x.44.2.34 connect-source Loopback12 remote-as nn

If the router does not use its loopback address as the source address when originating MSDP traffic, this is a finding.

Fix Text

Configure the router to use its loopback address is used as the source address when sending MSDP packets.

R2(config)#ip msdp peer x.44.2.34 connect-source lo12 remote-as nn