Service Manual

Protocol Ethernet Address
OSPF
01:00:5e:00:00:05
01:00:5e:00:00:06
RIP 01:00:5e:00:00:09
NTP 01:00:5e:00:01:01
VRRP 01:00:5e:00:00:12
PIM-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.
• Egress L3 ACL is not applied to multicast data traffic if you enable multicast routing.
First Packet Forwarding for Lossless
Multicast
All initial multicast packets are forwarded to receivers to achieve lossless multicast.
In previous versions, when the Dell Networking system is an RP, all initial packets are dropped until PIM
creates an (S,G) entry. When the system is an RP and a Source DR, these initial packet drops represent a loss
of native data, and when the system is an RP only, the initial packets drops represent a loss of register packets.
Both scenarios might be unacceptable depending on the multicast application. When the Dell Networking
system is the RP, and has receivers for a group G, it forwards all initial multicast packets for the group based
on the (*,G) entry rather than discarding them until the (S,G) entry is created, making Dell Networking systems
suitable for applications sensitive to multicast packet loss.
NOTE: When a source begins sending traffic, the Source DR forwards the initial packets to the RP as
encapsulated registered packets. These packets are forwarded via the soft path at a maximum rate of 70
packets/second. Incoming packets beyond this rate are dropped.
IPv4 Multicast Policies
The 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 Join
Multicast Features 698