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		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	2022-10-18

Details

Check Text ( C-54824r806120_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.

Check Text ( C-54824r806120_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.