The Cisco Multicast Source Discovery Protocol (MSDP) router 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-216637 | SRG-NET-000018-RTR-000009 | CISC-RT-000940 | SV-216637r1117236_rule | 2025-08-19 | 3 |
Description
To reduce any risk of a denial-of-service (DoS) attack from a rogue or misconfigured MSDP router, the router must be configured to limit the number of source-active messages it accepts from each peer.
ℹ️ Check
Review the router 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 remote-as nn
ip msdp sa-filter in 10.1.28.2 list MSDP_SA_FILTER
ip msdp sa-limit X.1.28.2 nnn
If the router is not configured to limit the source-active messages it accepts, this is a finding.
✔️ Fix
Configure the router to limit the amount of source-active messages it accepts from each peer.
R8(config)#ip msdp sa-limit x.1.28.2 nnn