Chapter 6 Using Multicast Manager 133

 

 

 

 

 

Table 39 General tab fields (continued)

 

 

 

 

 

Field

Description

 

 

 

 

 

 

Robustness

Robust value (based on the network’s tendency to lose

 

 

 

data). This value, along with the query interval, is used to

 

 

 

determine the group membership timeouts. It should be

 

 

 

set to that of the multicast router in the network. If more

 

 

 

than one multicast router is within a VLAN and the robust

 

 

 

values are different, set the Passport switch to the highest

 

 

 

value. The range is 2 to 255. The default is 2.

 

 

 

 

 

 

QueryInterval(sec)

In general, the time between queries sent to the host. this

 

 

 

value is used to determine the multicast group

 

 

 

membership timeouts. The real interval between queries

 

 

 

is still dependent on the multicast router within the VLAN.

 

 

 

Set this value to be the same as that of the multicast

 

 

 

routers in the VLAN. If there are multiple multicast routers

 

 

 

on the net, select the highest query interval value. The

 

 

 

query interval is in seconds (1 to 65535) with a default of

 

 

 

125 seconds.

 

 

 

 

 

 

MRouterPorts

Ports that have been configured as Multicast Router

 

 

 

Ports. Such ports provide connectivity but do not have to

 

 

 

be directly attached to a multicast router so the multicast

 

 

 

data and group reports are forwarded to the router.

 

 

 

 

 

 

ActiveMRouter

Active Multicast Router Ports are ports that provide

 

 

 

connectivity but do not have to be directly attached to a

 

 

 

multicast router. These ports include the Querier port and

 

 

 

all ports in the forwarding state that were configured by

 

 

 

the user, as well as those that were dynamically learned

 

 

 

using receiving queries.

 

 

 

 

 

 

ActiveQuerier

IP address of the last querier (multicast router) of this

 

 

 

VLAN that was heard by the switch.

 

 

 

 

 

 

QuerierPort

Port on which the LastQuerier is being heard.

 

 

 

 

 

 

MRouterExpiration

Time remaining before the multicast router is aged out. If

 

 

 

the switch does not receive any queries before this time

 

 

 

expires, it flushes out all group memberships known to the

 

 

 

VLAN. The Query Max Response Interval (obtained from

 

 

 

the Queries received) is used as the timer resolution.

 

 

 

 

 

Receiver tab

The Receiver tab (Figure 60) provides information about IGMP group receivers.

Using Optivity Switch Manager, Release 1.1.0.0

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Image 133
Nortel Networks Optivity Switch manual Receiver tab provides information about Igmp group receivers