410CHAPTER 11: IGMP SNOOPING COMMANDS

Table 79 Output of display igmp statistics

Field

Description

 

 

IGMP statistics

VLAN name. Statistics are listed separately for each VLAN.

for vlan

 

 

 

IGMP message

Type of IGMP message:

type

„ General-Queries— General group membership queries sent by

 

 

the multicast querier (multicast router or pseudo-querier).

 

„ GS-QueriesGroup-specific queries sent by the multicast

 

querier to determine whether there are receivers for a specific

 

group.

 

„ Report V1 — IGMP version 1 group membership reports sent

 

by clients who want to be receivers for the groups.

 

„ Report V2 — IGMP version 2 group membership reports sent

 

by clients who want to be receivers for the groups.

 

„ Leave — IGMP version 2 leave messages sent by clients who

 

want to stop receiving traffic for a group. Leave messages apply

 

only to IGMP version 2.

 

„ Mrouter-Adv— Multicast router advertisement packets. A

 

multicast router sends this type of packet to advertise the IP

 

address of the sending interface as a multicast router interface.

 

„ Mrouter-Term— Multicast router termination messages. A

 

multicast router sends this type of message when multicast

 

forwarding is disabled on the router interface, the router

 

interface is administratively disabled, or the router itself is

 

gracefully shutdown.

 

„ Mrouter-Sol— Multicast router solicitation messages. A

 

multicast client or a WX sends this type of message to

 

immediately solicit multicast router advertisement messages

 

from the multicast routers in the subnet.

 

„ DVMRP — Distance Vector Multicast Routing Protocol (DVMRP)

 

messages. Multicast routers running DVMRP exchange multicast

 

information with these messages.

 

„ PIM V1 — Protocol Independent Multicast (PIM) version 1

 

messages. Multicast routers running PIMv1 exchange multicast

 

information with these messages.

 

„ PIM V2 — PIM version 2 messages.

 

 

Received

Number of packets received.

 

 

Transmitted

Number of packets transmitted. This number includes both

 

multicast packets originated by the WX and multicast packets

 

received and then forwarded by the WX.

 

 

Dropped

Number of IGMP packets dropped by the WX.