126
Task Command
Remarks
Display RPF route
information about the
specified multicast source.
display multicast
[
all-instance | vpn-instance
vpn-instance-name
]
rpf-info
source-address
[
group-address
] [
|
{
begin
|
exclude
|
include
}
regular-expression
]
Available in any view.
Display minimum TTL
required for a multicast
packet to be forwarded.
display multicast
[
all-instance | vpn-instance
vpn-instance-name
]
minimum-ttl
[
interface-type
interface-number
] [
|
{
begin
|
exclude
|
include
}
regular-expression
]
Available in any view.
Clear forwarding entries
from the multicast
forwarding table.
reset multicast
[
all-instance | vpn-instance
vpn-instance-name
]
forwarding-table
{ {
source-address
[
mask
{
mask
|
mask-length
} ] |
group-address
[
mask
{
mask
|
mask-length
} ] |
incoming-interface
{
interface-type interface-number
|
register
} } * |
all
}
Available in user view.
When a forwarding
entry is removed from
the multicast forwarding
table, the
corresponding routing
entry is also removed
from the multicast
routing table.
Clear routing entries from
the multicast routing table.
reset multicast
[
all-instance | vpn-instance
vpn-instance-name
]
routing-table
{ {
source-address
[
mask
{
mask
|
mask-length
} ] |
group-address
[
mask
{
mask
|
mask-length
} ] |
incoming-interface
{
interface-type interface-number
|
register
} } * |
all
}
Available in user view.
When a routing entry is
removed from the
multicast routing table,
the corresponding
forwarding entry is also
removed from the
multicast forwarding
table.
Configuration examples
This section provides examples of configuring multicast routing and forwarding on routers.
Changing an RPF route
Network requirements
As shown in
, PIM-DM runs in the network. All routers in the network support multicast. Router
A, Router B, and Router C run OSPF. Typically, Receiver can receive the multicast data from Source
through the path Router A to Router B, which is the same as the unicast route. Receiver can receive the
multicast data from Source through the path: Router A to Router C to Router B, which is different from the
unicast route.
