Rule ID
SV-273582r1110912_rule
Version
V1R1
CCIs
PIM is a routing protocol used to build multicast distribution trees for forwarding multicast traffic across the network infrastructure. 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. If a PIM neighbor filter is not applied to those interfaces that have PIM enabled, unauthorized routers can join the PIM domain, discover and use the rendezvous points, and also advertise their rendezvous points into the domain. This can result in a denial of service by traffic flooding or result in the unauthorized transfer of data.
This requirement is not applicable for the DODIN Backbone. Verify on all PIM enabled interfaces, there is a neighbor filter applied: interface ethernet 1/1/10 ip address x.12.1.10 255.255.255.0 ip pim-sparse ip pim neighbor-filter PIM_NEIGHBORS ! ip access-list standard PIM_NEIGHBORS sequence 10 permit host x.1.2.6 ! If an interface is enabled for PIM without a neighbor filter list, this is a finding.
This requirement is not applicable for the DODIN Backbone. Create and apply neighbor filter list(s) as needed: ip access-list standard PIM_NEIGHBORS sequence 10 permit host x.1.2.6 ! interface ethernet 1/1/10 ip address x.12.1.10 255.255.255.0 ip pim-sparse ip pim neighbor-filter PIM_NEIGHBORS !