3com WX4400 3CRWX440095A Manual De Usuario

C

HAPTER

 13: IGMP S

NOOPING

 C

OMMANDS

History — Introduced in MSS Version 3.0.

Examples — The following command displays querier information for 
VLAN orange:

WX1200# display igmp querier vlan orange

Querier for vlan orange

Port Querier-IP 

Querier-MAC 

TTL

---- --------------- ----------------- -----

1 193.122.135.178 00:0b:cc:d2:e9:b4 

23

The following command shows the information MSS displays when the 
querier is the WX itself:

WX1200# display igmp querier vlan default

Querier for vlan default:

I am the querier for vlan default, time to next query is 20

The output indicates how many seconds remain before the 
pseudo-querier on the WX switch broadcasts the next general query 
report to IP address 224.0.0.1, the multicast all-systems group.

If IGMP snooping does not detect a querier, the output indicates this 
finding, as shown in the following example:

WX1200# display igmp querier vlan red

Querier for vlan red:

There is no querier present on vlan red

This condition does not necessarily indicate a problem. For example, 
election of the querier might be in progress.

Table 83 describes the fields in this display. Table 82 on page 519 
describes the fields in the display when a querier other than the WX is 
present.

Table 83   Output for display igmp mrouter

Querier for vlan VLAN containing the querier. Information is listed separately for 

each VLAN.

Querier-IP

IP address of the querier interface. 

Querier-MAC

MAC address of the querier interface. 

TTL

Number of seconds before this entry ages out if the WX does 
not receive a query message from the querier.