Lucent Technologies P550 - Manual (Page 144)

Configuring IP Routing (Layer 3)
7-18 Cajun P550/P220 Switch Operation Guide
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.
Query Response Interval
in (sec) Configure the amount of time to wait for a response from a
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
Interval in (sec) Enter the amount of time (in seconds) this interface should
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.
Table 7-8. IGMP Interface Parameters (Continued)
Parameter Allows you to...