The Arista MSDP router must be configured to limit the amount of source-active messages it accepts on per-peer basis.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| low | V-255995 | SRG-NET-000018-RTR-000009 | ARST-RT-000090 | SV-255995r882327_rule | 2025-02-20 | 2 |
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
To verify the MSDP peer and the sa-limit filter is configured, execute the command "show run | sec router msdp".
router msdp
peer 10.1.12.2
sa-limit 500
peer 10.1.55.78
sa-limit 900
If the Arista router is not configured with a peer limit, this is a finding.
✔️ Fix
Configure the Arista MSDP router to limit the amount of source-active messages it accepts from each peer.
!
router (config) #router msdp
router (config-router-msdp) #peer 10.1.1.5
router (config-router-msdp-peer 10.1.1.5) # sa-limit 500
router (config-router-msdp) #peer 10.1.55.78
router (config-router-msdp-peer 10.1.55.78) # sa-limit 900
router (config-router-msdp-peer 10.1.55.78) # exit