Brocade Communications Systems Layer 3 Routing Configuration ICX 6650 - Manual (Page 260)

242 Brocade ICX 6650 Layer 3 Routing Configuration Guide
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OSPF V3 configuration
NOTE
The default action rule for route-map is to deny all routes that are not explicitly permitted. If you
configure a “deny” route map but want to permit other routes that do not match the rule, configure
an “empty” permit route map. For example.
Brocade
(config)#route-map abc deny 10
Brocade
(config-routemap abc)#match metric 20
Brocade
(config-routemap abc)#route-map abc permit 20
Without the last line in the above example, all routes would be denied.
Default route origination
When the Brocade device is an OSPF Autonomous System Boundary Router (ASBR), you can
configure it to automatically generate a default external route into an OSPF V3 routing domain. This
feature is called “default route origination” or “default information origination.”
By default, the Brocade device does not advertise the default route into the OSPF V3 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).
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
The Brocade device does not advertise the OSPF default route, regardless of other configuration
parameters, unless you explicitly enable default route origination.
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.
Configuring a default route origination
To create and advertise a default route with a metric of 2 and as a type 1 external route, enter the
following command.
Brocade(config-ospf6-router)#default-information-originate always metric 2
metric-type type1
Syntax: [no] default-information-originate [always] [metric value] [metric-type type]
The always keyword originates a default route regardless of whether the device has learned a
default route. This option is disabled by default.
The metric value parameter specifies a metric for the default route. If this option is not used, the
value of the default-metric command is used for the route. For information about this command,
refer to
“Modifying default metric for routes redistributed into OSPF V3” on page 237