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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.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-221146 | CISC-RT-000940 | SV-221146r622190_rule | Low |
| 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. |
| STIG | Date |
|---|---|
| Cisco NX-OS Switch RTR Security Technical Implementation Guide | 2021-03-29 |
Details
| Check Text ( C-22861r409927_chk ) |
|---|
| 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 Text (F-22850r409928_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 |