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Tracing a multicast path – H3C Technologies H3C S10500 Series Switches User Manual

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Configuring the multicast forwarding table size for the public network

Follow these steps to configure the multicast forwarding table size for the public network:

To do...

Use the command...

Remarks

Enter system view

system-view

Configure the maximum number of
entries in the multicast forwarding

table

multicast forwarding-table
route-limit limit

Optional
2000 by default.

Configure the maximum number of
downstream nodes for a single

multicast forwarding entry

multicast forwarding-table
downstream-limit limit

Optional
128 by default.

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...

Use the command...

Remarks

Enter system view

system-view

Enter VPN instance view

ip vpn-instance vpn-instance-name

Configure the maximum number of
entries in the multicast forwarding

table

multicast forwarding-table
route-limit limit

Optional
2000 by default.

Configure the maximum number of
downstream nodes for a single

route in the multicast forwarding

table

multicast forwarding-table
downstream-limit limit

Optional
128 by default.

Tracing a multicast path

You can run the mtracert command to trace the path down which the multicast traffic flows from a given

first-hop router to the last-hop router.

To do…

Use the command…

Remarks

Trace a multicast path

mtracert source-address
[ [ last-hop-router-address ]

group-address ]

Required
Available in any view

Displaying and maintaining multicast routing and

forwarding

To do...

Use the command...

Remarks

Display multicast boundary
information

display multicast [ all-instance | vpn-instance
vpn-instance-name ] boundary [ group-address [ mask |
mask-length ] ] [ interface interface-type interface-number ]

[ | { begin | exclude | include } regular-expression ]

Available in
any view