Tracing A Multicast Path; Displaying And Maintaining Multicast Routing And Forwarding - 3Com MSR 50 Series Configuration Manual

1106 C 68: M
HAPTER ULTICAST

Tracing a Multicast Path

Displaying and
Maintaining Multicast
Routing and
Forwarding
R F C
OUTING AND ORWARDING
If the configured maximum number of routing entries in the multicast forwarding
table is smaller than the current number, the routes in excess of the configured
limit will not be deleted immediately; instead they must be deleted by the
multicast routing protocol. In addition, newly added route entries cannot be
installed to the forwarding table.
Configuring the multicast forwarding table size in the public instance
Follow these steps to configure the multicast forwarding table size in the public
instance:
To do...
Enter system view
Configure the maximum number
of downstream nodes for a single
route in the multicast forwarding
table
Configure the maximum number
of routing entries in the multicast
forwarding table
Configuring the multicast forwarding table size in a VPN instance
Follow these steps to configure the multicast forwarding table size in a VPN
instance:
To do...
Enter system view
Enter VPN instance view
Configure the maximum number of
downstream nodes for a single
route in the multicast forwarding
table
Configure the maximum number of
routing entries in the multicast
forwarding table
You can run the mtracert command to trace the path down which the multicast
traffic from a given multicast source flows to the last-hop router for
troubleshooting purposes.
To do...
Trace a multicast path
To do... Use the command...
View the multicast display multicast boundary [ vpn-instance
boundary vpn-instance-name | all-instance ] [ group-address
information [ mask | mask-length ] ] [ interface interface-type
interface-number ]
ONFIGURATION
Use the command...
system-view
multicast forwarding-table
downstream-limit limit
multicast forwarding-table
route-limit limit
Use the command...
system-view
ip vpn-instance
vpn-instance-name
multicast forwarding-table
downstream-limit limit
multicast forwarding-table
route-limit limit
Use the command...
mtracert source-address
[ [ last-hop-router-address ]
group-address ]
Remarks
-
Optional
The default is 128.
Optional
The default is 256.
Remarks
-
-
Optional
The default is 128.
Optional
The default is 256.
Remarks
Required
Available in any view
Remarks
Available in any
view