A Protocol Independent Multicast (PIM) neighbor filter must be implemented to restrict and control multicast traffic.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| low | V-251389 | NET2007 | NET2007 | SV-251389r806122_rule | 2024-08-02 | 10 |
| 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. |
| ℹ️ Check |
|---|
| 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 |
|---|
| The router administrator configures and binds a PIM neighbor filter to those interfaces that have PIM enabled. |