Configuring IP Routing (Layer 3)

Table 7-8.IGMP Interface Parameters (Continued)

Parameter

Allows you to...

 

 

Query Response Interval

Configure the amount of time to wait for a response from a

in (sec)

host after sending a query. If no response is received within

 

this time, the host is removed from the group table. The default

 

value is 10 seconds.

 

 

Neighbor Querier Timeout

Enter the amount of time (in seconds) this interface should

Interval in (sec)

wait after hearing a neighbor’s query before assuming the role

 

of querier, if not already the querier. If no query is received

 

from a neighbor with a lower IP address in the allotted time,

 

this interface becomes the querier. (IGMP Version 2.0 only).

 

The default value is 255 seconds.

 

 

Robustness Variable

Perform tuning 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.

 

 

3.Click APPLY to save your changes, or CANCEL to restore previous settings.

Configuring DVMRP

Distance Vector Multicast Routing Protocol (DVMRP) is a distance vector routing protocol that uses IP packets with protocol type 2 (IGMP) to exchange routing datagrams. DVMRP enables multicast routers to exchange distance vector updates that contain lists of multicast flows and their cost metrics. DVMRP uses tunneling between pairs of DVMRP routers when traffic must pass through one or more intermediary routers or gateways that do not implement DVMRP.

Configuring the DVMRP Global Configuration

To configure the DVMRP global configuration:

1.In the IP Configuration section of the Web Agent window, click Global Configuration. The IP Global Configuration dialog box opens.

2.From the IP Multicast Forwarding pull-down menu, select Enable. This enables IP multicast globally.

3.In the DVMRP Configuration section of the Web Agent window, click Global Configuration. The DVMRP Global Configuration dialog box opens.

4.From the DVMRP Version 3/xFF pull down menu, select Enable.

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Cajun P550/P220 Switch Operation Guide