A Protocol Independent Multicast (PIM) neighbor filter must be implemented to restrict and control multicast traffic.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-251389 | NET2007 | SV-251389r806122_rule | CCI-001414 | low |
| Description | ||||
| Protocol Independent Multicast (PIM) is a routing protocol that is used by the IP core for forwarding multicast traffic. PIM traffic must be limited to only known PIM neighbors by configuring and binding a PIM neighbor filter to those interfaces that have PIM enabled. | ||||
| STIG | Date | |||
| Network Infrastructure Policy Security Technical Implementation Guide | 2024-08-02 | |||
Details
Check Text (C-251389r806122_chk)
Step 1: Verify that an ACL is configured that will specify the allowable PIM neighbors similar to the following example.
ip access-list standard pim-neighbors permit 192.0.2.1
permit 192.0.2.3
Step 2: Verify that a pim neighbor-filter command is configured on all PIM enabled interfaces that is referencing the PIM neighbor ACL similar to the following example:
interface GigabitEthernet0/3
ip address 192.0.2.2 255.255.255.0
pim neighbor-filter pim-neighbors
If PIM neighbor filter is not bound to interfaces that have PIM enabled, this is a finding.
Fix Text (F-54777r806121_fix)
The router administrator configures and binds a PIM neighbor filter to those interfaces that have PIM enabled.