Brocade Multi-Service IronWare Multicast Configuration Guide (Supporting R05.6.00) - Manual (Page 109)

Multi-Service IronWare Multicast Configuration Guide 97
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Configuring DVMRP
1
Modifying DVMRP interface parameters
DVMRP global parameters come with preset values. The defaults work well in most networks, but
you can modify the following interface parameters if you need to:
• TTL Threshold
• Metric
• Advertising
Modifying the TTL threshold
The TTL defines the minimum value required in a packet in order for the packet to be forwarded out
the interface. For example, if the TTL for an interface is set at 10 it means that only those packets
with a TTL value of 10 or more are forwarded. Likewise, if an interface is configured with a TTL
Threshold value of 1, all packets received on that interface are forwarded. Possible values are from
1 – 64. The default value is 1.
To set a TTL of 64, enter the following.
Brocade(config)# int e 1/4
Brocade(config-if-e10000-1/4)# ip dvmrp ttl-threshold 60
Syntax: [no] ip dvmrp ttl-threshold 1-64
Modifying the metric
The router uses the metric when establishing reverse paths to some networks on directly attached
interfaces. Possible values are from 1 – 31 hops. The default is 1.
To set a metric of 15 for a DVMRP interface, enter the following.
Brocade(config)# interface e 3/5
Brocade(config-if-e10000-3/5)# ip dvmrp metric 15
Syntax: [no] ip dvmrp metric 1-31
Disabling advertising
You can disable the advertisement of a local route on the interface. By default, advertising is
enabled.
To disable advertising on an interface, enter the following.
Brocade(config-if-e10000-1/4)# ip dvmrp advertise-local off
Syntax: [no] ip dvmrp advertise-local off
Use the no option with this command to re-enable advertising.
Displaying DVMRP information
You can display the following DVMRP information:
• DVMRP group information
• DVMRP interface information
• DVMRP multicast cache information