Dell Brocade DCX, Configuration Manual

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706 BigIron RX Series Configuration Guide
53-1001810-01
Configuring OSPF
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Syntax: summary-address <ip-addr> <ip-mask>
The <ip-addr> parameter specifies the network address.
The <ip-mask> parameter specifies the network mask.
To display the configured summary addresses, enter the following command at any level of the CLI.
BigIron RX(config-ospf-router)# show ip ospf config
OSPF Redistribution Address Ranges currently defined:
Range-Address Subnetmask
1.0.0.0 255.0.0.0
1.0.1.0 255.255.255.0
1.0.2.0 255.255.255.0
Syntax: show ip ospf config
Configure default route origination
When the device is an OSPF Autonomous System Boundary Router (ASBR), you can configure it to
automatically generate a default external route into an OSPF routing domain. This feature is called
“default route origination” or “default information origination”.
By default, the device does not advertise the default route into the OSPF domain. If you want the
device to advertise the OSPF default route, you must explicitly enable default route origination.
When you enable OSPF default route origination, the device advertises a type 5 default route that is
flooded throughout the AS (except stub areas and NSSAs). In addition, internal NSSA ASBRs
advertise their default routes as translatable type 7 default routes.
The device advertises the default route into OSPF even if OSPF route redistribution is not enabled,
and even if the default route is learned through an IBGP neighbor.
NOTE
BigIron RX never advertises the OSPF default route, regardless of other configuration parameters,
unless you explicitly enable default route origination using the following method.
If the device is an ASBR, you can use the “always” option when you enable the default route
origination. The always option causes the ASBR to create and advertise a default route if it does not
already have one configured.
If default route origination is enabled and you disable it, the default route originated by the device
is flushed. Default routes generated by other OSPF routers are not affected. If you re-enable the
feature, the feature takes effect immediately and thus does not require you to reload the software.
NOTE
The ABR (BigIron RX) will not inject the default route into an NSSA by default and the command
described in this section will not cause the BigIron RX to inject the default route into the NSSA. To
inject the default route into an NSSA, use the area
<num> | <ip-addr> nssa
default-information-originate command. Refer to “Assign a Not-So-Stubby Area (NSSA)” on
page 685.
To enable default route origination, enter the following command.
BigIron RX(config-ospf-router)# default-information-originate
To disable the feature, enter the following command.
BigIron RX(config-ospf-router)# no default-information-originate