Avaya 882 Manual Do Utilizador

12-54

User Guide for the Avaya P580 and P882 Multiservice Switches, v6.1

Chapter 12

This Router is Group 
Membership Querier

Router that was configured or elected to be the 
designated group membership querier. The switch 
queries hosts on each interface only when it is acting as 
the designated querier on that interface.

Robustness Variable

Setting for the expected packet loss on a subnet. If a 
subnet is expected to have more packet loss, the 
Robustness Variable should be increased. The 
Robustness Variable must not be set to 0 and should not 
be set to 1.

The default value is 2

Next Query Request 
(sec)

Remaining amount of time (in seconds) before the next 
group membership query is transmitted.

Neighbor Querier 
Timeout (sec)

Amount of time (in seconds) remaining before this 
interface assumes the role of designated querier. This 
timer is reset to the value entered for the Neighbor 
Querier Timeout Interval each time an IGMP query is 
received from a neighbor with a lower IP address. If no 
response is received in the allowed time, the switch will 
become the designated querier on this interface. 
Applicable only if IGMP V2 is used.

Group Join Requests 
Received

Number of new groups on this interface.

Group Leave 
Requests Received

Number of leave requests received on this interface.

Group Reports 
Received

Number of reports received on this interface in response 
to a group membership query. Hosts respond to a Query 
by generating Host Membership Reports reporting each 
host group to which they belong on the network 
interface from which the Query was received.

Query Messages 
Received

Number of query messages received from other 
multicast routers.

Query Messages 
Transmitted

Number of query messages sent by a multicast router. 
These messages are sent to discover which host groups 
have members on their attached local networks. Queries 
are addressed to the all-hosts group (address 224.0.0.1), 
and carry an IP time-to-live of 1.

Unknown Messages 
Received

IGMP messages received with an unsupported type.

Number of Current 
Groups

Number of groups on each interface for which there are 
entries in the Group Membership Table.