Dell Brocade DCX, Configuration Manual

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1206 BigIron RX Series Configuration Guide
53-1001810-01
Configuring OSPFv3
48
NOTE
If you specify the cost for an individual interface, the cost you specify overrides the cost calculated
by the software.
Some interface types are not affected by the reference bandwidth and always have the same cost
regardless of the reference bandwidth in use:
•
The cost of a loopback interface is always 0.
•
The cost of a virtual link is calculated using the Shortest Path First (SPF) algorithm and is not
affected by the auto-cost feature.
•
The bandwidth for tunnel interfaces is 9 Kbps and is not affected by the auto-cost feature.
For example, to change the reference bandwidth to 500, enter the following command.
BigIron RX(config-ospf6-router)# auto-cost reference-bandwidth 500
The reference bandwidth specified in this example results in the following costs:
•
10 Mbps port’s cost = 500/10 = 50
•
100 Mbps port’s cost = 500/100 = 5
•
1000 Mbps port’s cost = 500/1000 = 0.5, which is rounded up to 1
•
155 Mbps port’s cost = 500/155 = 3.23, which is rounded up to 4
•
622 Mbps port’s cost = 500/622 = 0.80, which is rounded up to 1
•
2488 Mbps port’s cost = 500/2488 = 0.20, which is rounded up to 1
The costs for 10 Mbps, 100 Mbps, and 155 Mbps ports change as a result of the changed
reference bandwidth. Costs for higher-speed interfaces remain the same.
Syntax: [no] auto-cost reference-bandwidth < number >
The < number > parameter specifies the reference bandwidth and can be a value from 1 –
4294967. The default is 100.
To restore the reference bandwidth to its default value and thus restore the default costs of
interfaces to their default values, enter the no form of this command.
Redistributing routes into OSPFv3
In addition to specifying which routes are redistributed into OSPFv3, you can configure the following
aspects related to route redistribution:
•
Default metric
•
Metric type
•
Advertisement of an external aggregate route
Configuring route redistribution into OSPFv3
You can configure the Brocade device to redistribute routes from the following sources into
OSPFv3:
•
IPv6 static routes
•
Directly connected IPv6 networks
•
BGP4+