Brocade Virtual ADX Switch and Router Guide (Supporting ADX v03.1.00) - Manual (Page 176)

162 Brocade Virtual ADX Switch and Router Guide
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Enabling OSPFv3
7
Modifying metric type for routes redistributed into OSPF version 3
The Brocade device uses the metric-type parameter by default for all routes redistributed into
OSPFv3 unless you specify a different metric type for individual routes using the redistribute
command. (For more information about using the redistribute command, refer to
“Redistributing
routes into OSPFv3” on page 159).
A type 1 route specifies a small metric (two bytes), while a type 2 route specifies a big metric (three
bytes). The default value is type 2.
To modify the default value of type 2 to type 1, enter the following command:
Virtual ADX(config-ospf6-router)#metric-type type1
Syntax: [no] metric-type type1 | type2
To restore the metric type to the default value, use the no form of this command.
Configuring external route summarization
When the Brocade device is an OSPF Autonomous System Boundary Router (ASBR), you can
configure it to advertise one external route as an aggregate for all redistributed routes that are
covered by a specified IPv6 address range.
When you configure an address range, the range takes effect immediately. All the imported routes
are summarized according to the configured address range. Imported routes that have already
been advertised and that fall within the range are flushed out of the AS and a single route
corresponding to the range is advertised.
If a route that falls within a configured address range is imported by the Brocade device, no action
is taken if the device has already advertised the aggregate route; otherwise, the device advertises
the aggregate route. If an imported route that falls within a configured address range is removed by
the device, no action is taken if there are other imported route(s) that fall with in the same address
range; otherwise the aggregate route is flushed.
You can configure up to 32 address ranges. The Brocade device sets the forwarding address of the
aggregate route to zero and sets the tag to zero.
If you delete an address range, the advertised aggregate route is flushed and all imported routes
that fall within the range are advertised individually.
If an external link state database overflow (LSDB) condition occurs, all aggregate routes are flushed
out of the AS, along with other external routes. When the Brocade device exits the external LSDB
overflow condition, all the imported routes are summarized according to the configured address
ranges.
NOTE
If you use redistribution filters in addition to address ranges, the Brocade device applies the
redistribution filters to routes first, then applies them to the address ranges.
NOTE
If you disable redistribution, all the aggregate routes are flushed, along with other imported routes.
NOTE
This option affects only imported, Type 5 external routes. A single Type 5 LSA is generated and
flooded throughout the AS for multiple external routes.