Use the show ip pim mroute command to display information from the route table. The syntax for this command is as follows.
show ip pim mroute [group <A.B.C.D>] [source <A.B.C.D>] [terse]
Note
In a PIM-SM or PIM-SSM Layer 3 MLT/SMLT multicast environment, when an SMLT link down or SMLT link up event occurs, or when an individual port in an (S)MLT goes down or comes back up, traffic can be re-hashed (switched over) either to another port in the (S)MLT or to any of the IST's MLT ports. This is valid, as the nature of the (S)MLT environment is that traffic can ingress on any one of these ports and be successfully forwarded to receivers. However, the Incoming Port record in the following table may not accurately reflect which port the data is arriving on at any given time. This does not cause traffic loss. Checking traffic statistics on the ports of the (S)MLT/ IST can be used to determine the ingress port.
The following table shows the field descriptions for this command.
|
Field |
Description |
|---|---|
|
Src |
Displays the IP address of the source that sends the multicast stream. A nonzero value indicates that a source sends multicast traffic. 0.0.0.0 indicates that this entry is created in response to a receiver that wants to receive this traffic. |
|
Grp |
Displays the IP multicast group address. |
|
RP |
Displays the IP address of the RP router. |
|
Upstream |
Displays the IP address of the next hop that a multicast packet takes when received on the correct port as listed on the incoming interface. |
|
Flags |
Displays the flags configured based on the condition of the receivers, the RP, and the senders. Use the legend at the bottom of the output to explain the flag values. |
|
Incoming Port |
Lists the port through which a multicast packet can ingress. If the port is a member of a Multi-Link Trunk (MLT), the packets can ingress on any port of the MLT. |
|
Outgoing Ports |
Lists all ports through which traffic that enters on incoming ports exit. |
|
Joined Ports |
Lists all ports that received PIM join messages. |
|
Pruned Ports |
List all ports that received PIM prune messages. |
|
Leaf Ports |
Lists multicast receivers that directly connect to the router. |
|
Asserted Ports |
Lists all ports that received assert messages. The router uses assert messages to help determine the best path to the source. |
|
Prune Pending Ports |
Lists all ports currently in the prune-pending state. |
|
Assert Winner Ifs |
Lists interfaces elected the assert winner. The winner continues to forward multicast traffic to the LAN. |
|
Assert Loser Ifs |
Lists interfaces not elected as the assert winner. The loser interface is pruned. |
|
Timers |
Displays the up time and expiration time for the entry in the routing table. |
|
AssertVifTimer |
Displays the time after which the assert winner state refreshes. |
Switch:1(config)#show ip pim mroute
================================================================================
Pim Multicast Route - GlobalRouter
================================================================================
Src: 10.1.1.3 Grp: 232.2.1.1 RP: 0.0.0.0 Upstream: 70.70.70.4
Flags: SPT CACHE SG
Incoming Port: Vlan70-MLT-4(1/24),
Outgoing Ports: Vlan2-1/8,1/40,
Joined Ports: Vlan2-1/8,
Pruned Ports:
Leaf Ports: Vlan2-1/40,
Asserted Ports:
Prune Pending Ports:
Assert Winner Ifs:
Assert Loser Ifs:
TIMERS:
Entry JP RS Assert
207 9 0 0
VLAN-Id: 2 3 4 70
Join-P: 191 0 0 0
Assert: 0 0 0 0
--------------------------------------------------------------------------------
Src: 10.1.1.4 Grp: 232.2.1.1 RP: 0.0.0.0 Upstream: 70.70.70.4
Flags:
SPT CACHE SG
Incoming Port: Vlan70-MLT-4(1/24),
Outgoing Ports: Vlan2-1/8,1/40,
Joined Ports: Vlan2-1/8,
Pruned Ports:
Leaf Ports: Vlan2-1/40,
Asserted Ports:
Prune Pending Ports:
Assert Winner Ifs:
Assert Loser Ifs:
TIMERS:
Entry JP RS Assert
230 19 0 0
VLAN-Id: 2 3 4 70
Join-P: 203 0 0 0
Assert: 0 0 0 0
--------------------------------------------------------------------------------
Total Num of Entries Displayed 2/2