Check: CISC-RT-000950
Cisco IOS XE Switch RTR STIG:
CISC-RT-000950
(in versions v2 r5 through v1 r0.1)
Title
The Cisco Multicast Source Discovery Protocol (MSDP) switch must be configured to use a loopback address as the source address when originating MSDP traffic. (Cat III impact)
Discussion
Using a loopback address as the source address offers a multitude of uses for security, access, management, and scalability of MSDP switches. It is easier to construct appropriate ingress filters for switch 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 switch’s loopback address instead of the numerous physical interface addresses.
Check Content
Step 1: Review the switch configuration to verify that a loopback address has been configured. interface Loopback12 ip address x.12.2.2 255.255.255.255 Step 2: Verify that the loopback interface is used as the source address for all MSDP packets generated by the switch. ip msdp peer x.44.2.34 connect-source Loopback12 remote-as nn If the switch does not use its loopback address as the source address when originating MSDP traffic, this is a finding.
Fix Text
Configure the switch to use its loopback address is used as the source address when sending MSDP packets. SW2(config)#ip msdp peer x.44.2.34 connect-source lo12 remote-as nn
Additional Identifiers
Rule ID: SV-221069r622190_rule
Vulnerability ID: V-221069
Group Title: SRG-NET-000512-RTR-000011
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000366 |
The organization implements the security configuration settings. |
Controls
Number | Title |
---|---|
CM-6 |
Configuration Settings |