Dell BigIron RX Series, Configuration Manual

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BigIron RX Series Configuration Guide 703
53-1002253-01
Configuring OSPF
25
Changing the reference bandwidth
To change the reference bandwidth, enter a command such as the following at the OSPF
configuration level of the CLI:
BigIron RX(config-ospf-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
The costs for 10 Mbps and 100 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 <num>
The <num> 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 following command.
BigIron RX(config-ospf-router)# no auto-cost reference-bandwidth
Define redistribution filters
Route redistribution imports and translates different protocol routes into a specified protocol type.
On the BigIron RX, redistribution is supported for static routes, ISIS, OSPF, RIP, and BGP4. OSPF
redistribution supports the import of static, ISIS, RIP, and BGP4 routes into OSPF routes.
NOTE
The BigIron RX advertises the default route into OSPF even if redistribution is not enabled, and even
if the default route is learned through an IBGP neighbor. IBGP routes (including the default route)
are not redistributed into OSPF by OSPF redistribution (for example, by the OSPF redistribute
command).
In Figure 107 on page 704, an administrator wants to configure the BigIron RX acting as the ASBR
(Autonomous System Boundary Router) between the RIP domain and the OSPF domain to
redistribute routes between the two domains.
NOTE
The ASBR must be running both RIP and OSPF protocols to support this activity.