Protocol Ethernet Address01:00:5e:00:00:06RIP 01:00:5e:00:00:09NTP 01:00:5e:00:01:01VRRP 01:00:5e:00:00:12PIM-SM 01:00:5e:00:00:0d• The Dell Networking OS implementation of MTRACE is in accordance with IETF draft draft-fenner-traceroute-ipm.• Multicast is not supported on secondary IP addresses.• If you enable multicast routing, egress Layer 3 ACL is not applied to multicast data traffic.Multicast PoliciesThe Dell Networking OS supports multicast features for IPv4.IPv4 Multicast PoliciesThe following sections describe IPv4 multicast policies.• Limiting the Number of Multicast Routes• Preventing a Host from Joining a Group• Preventing a PIM Router from Forming an Adjacency• Preventing a Source from Registering with the RP• Preventing a PIM Router from Processing a JoinLimiting the Number of Multicast RoutesWhen the total number of multicast routes on a system limit is reached, the Dell Networking OS does not process Internet groupmanagement protocol (IGMP) or multicast listener discovery protocol (MLD) joins to protocol-independent multicast (PIM) — though itstill processes leave messages — until the number of entries decreases below 95% of the limit.When the limit falls below 95% after hitting the maximum, the system begins relearning route entries through IGMP, MLD, and multicastsource discovery protocol (MSDP).• If you increase the limit after it is reached, subsequent join requests are accepted. In this case, increase the limit by at least 10% forIGMP and MLD to resume.• If you decrease the limit after it is reached, the Dell Networking OS does not clear the existing sessions. Entries are cleared after atimeout (you may also clear entries using the clear ip mroute command).NOTE: The Dell Networking OS waits at least 30 seconds between stopping and starting IGMP join processing. You mayexperience this delay when manipulating the limit after it is reached.When the multicast route limit is reached, the following displays:3w1d13h: %RPM0-P:RP2 %PIM-3-PIM_TIB_LIMIT: PIM TIB limit reached. No new routes willbe learnt until TIB level falls below low watermark.3w1d13h: %RPM0-P:RP2 %PIM-3-PIM_TIB_LIMIT: PIM TIB below low watermark. Route learningwill begin.To limit the number of multicast routes, use the following command.• Limit the total number of multicast routes on the system.CONFIGURATION mode570 Multicast Features
