display multicast forwarding-table

Function

The display multicast forwarding-table command displays the multicast forwarding table.

Format

display multicast [ vpn-instance vpn-instance-name | all-instance ] forwarding-table [ group-address [ mask { group-mask | group-mask-length } ] | source-address [ mask { source-mask | source-mask-length } ] | incoming-interface { interface-type interface-number | register } | outgoing-interface { include | exclude | match } { interface-type interface-number | register | none } | { statistics | verbose } ] ^*

Parameters

Parameter	Description	Value
vpn-instance vpn-instance-name	Specifies a VPN instance. vpn-instance-name specifies the name of the VPN instance.	The value must be an existing VPN instance name.
all-instance	Indicates all the instances.	-
group-address	Specifies a multicast group address.	The address is in dotted decimal notation and ranges from 224.0.1.0 to 239.255.255.255.
mask	Specifies the mask of a multicast address or source address.	-
group-mask	Specifies the mask of the multicast group address.	The mask is in dotted decimal notation.
group-mask-length	Specifies the mask length of the multicast group address.	The value is a decimal integer that ranges from 4 to 32.
source-address	Specifies the mask of the multicast source address.	The mask is in dotted decimal notation.
source-mask	Specifies the mask of the multicast source address.	The mask is in dotted decimal notation.
source-mask-length	Specifies the mask length of the multicast source address.	The value is a decimal integer that ranges from 0 to 32.
incoming-interface	Indicates the inbound interface of a multicast forwarding entry.	-
interface-type interface-number	Specifies the type and the number of an interface.	-
register	Indicates the register interface of PIM-SM.	-
outgoing-interface	Indicates the outbound interface of a multicast forwarding entry.	-
include	Displays the (S, G) entry list that contains the specified downstream interface.	-
exclude	Displays the (S, G) entry list that does not contain the specified downstream interface.	-
match	Displays the (S, G) entry list that matches the specified interface and the (S, G) entries have only one specified interface.	-
none	Indicates that the downstream interface list is null.	-
verbose	Displays the detailed information about the multicast forwarding table.	-
statistics	Displays the statistics about the multicast forwarding table.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

During multicast routing and forwarding, routing information generated by multicast routing protocols is saved in a multicast routing table. The switch selects the optimal multicast routes from the routing table according to multicast routing and forwarding policies, and then delivers the selected multicast routes to the multicast forwarding table to guide multicast data forwarding.

You can use the display multicast forwarding-table command to check whether multicast forwarding entries have been generated and whether multicast data can be forwarded normally.

Example

# Display the multicast forwarding table.

<HUAWEI> display multicast forwarding-table
Multicast Forwarding Table of VPN-Instance: public net
Total 1 entry, 1 matched

00001. (10.10.10.2, 225.0.0.1)
     MID: 0, Flags: ACT
     Uptime: 00:08:32, Timeout in: 00:03:26
     Incoming interface: Vlanif10
     List of 1 outgoing interfaces:
       1:  Vlanif20
           Activetime: 00:23:15
     Matched 154 packets(15378 bytes), Wrong If 0 packets
     Forwarded 154 packets(15378 bytes)

**Table 1** Description of the **display multicast forwarding-table** command output
Item	Description
Multicast Forwarding Table of VPN-Instance: public net	VPN instance to which the multicast forwarding table corresponds. public net indicates the public network instance.
Total 1 entry, 1 matched	Total number of forwarding entries and number of eligible forwarding entries.
00001	Sequence number of the (S, G) entry.
(10.10.10.2, 225.0.0.1)	(S, G) entry in the multicast forwarding table.
MID	Uniquely identifies the multicast forwarding entry in the MFIB table. MID is used to rapidly search the multicast forwarding table.
Flags	Indicates the status flag of the (S, G) entry. ACT: indicates that an active event is triggered. DUM: indicates a dummy entry. MISS: indicates that the nocache time needs to be reported. DROP: indicates packet dropping. LTH: indicates that the traffic volume is below the threshold. DEL: indicates a deleted entry. RST: indicates that registration of the known timer is started. 2SYNC: indicates that the entry is contained in the MFIB table but it does not exist on the device. 2ADD: indicates that the entry existing on the device has not been added to the MFIB table. CLR: indicates that the MFIB table is resetting. L2FWD: indicates that the device forwards Layer 2 traffic in multicast mode. 2ACK: indicates that the VPN instance is waiting for the ACK message from the slave main control board. 2RSED: indicates that the entry is waiting for retransmission. BKCLR: indicates that the MFIB table on the slave main control board is resetting. 2DEL: indicates that the entry deleted from the device has not been removed from the MFIB table. PDEL: indicates that the entry does not exist on the device. A denotes addition; D denotes deletion; I denotes upstream update; R denotes RP update; P denotes PMBR; F denotes flag. S denotes SPT; E denotes encapsulation group update; US denotes status update; CS denotes status clearing.
Uptime	Period duration of the (S, G) entry.
Timeout in	Remaining time of the (S, G) entry.
Incoming interface	Upstream interface of the (S, G) entry.
List of 1 outgoing interfaces	Downstream interface list. The contents of the downstream interface list are as follows: Name and number of the outbound interface The existing time of outbound interface
Matched rate: 0 packets/sec, 0 bits/sec	Rate of multicast packets matching the (S, G) entry. NOTE: Only the S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-HI, S6730-H, S6730S-H, S6730-S, and S6730S-S can provide the accurate counter values.
Wrong If 0 packets	Number of multicast packets matching the (S, G) entry but are not forwarded. NOTE: Only the S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-HI, S6730-H, S6730S-H, S6730-S, and S6730S-S can provide the accurate counter values.
Forwarded 154 packets(15378 bytes)	Number of packets and bytes forwarded by the (S, G) entry. NOTE: Only the S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-HI, S6730-H, S6730S-H, S6730-S, and S6730S-S can provide the accurate counter values.