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.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| low | V-221146 | SRG-NET-000018-RTR-000009 | CISC-RT-000940 | SV-221146r1137903_rule | 2026-03-04 | 3 |
Description
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.
ℹ️ Check
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.
✔️ Fix
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