Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide - Manual (Page 265)

To change the authentication-change interval, enter a command such as the following at the interface
configuration level of the CLI.
device(config-if-e10000-2/5)# ip ospf auth-change-wait-time 400
Syntax: [no] ip ospf auth-change-wait-time secs
The secs parameter specifies the interval and can be from 0 - 14400 seconds. The default is 300
seconds (5 minutes).
NOTE
For backward compatibility, the ip ospf md5-authentication key-activation-wait-time command is still
supported.
Block flooding of outbound LSAs on specific OSPF interfaces
By default, the device floods all outbound LSAs on all the OSPF interfaces within an area. You can
configure a filter to block outbound LSAs on an OSPF interface. This feature is particularly useful when
you want to block LSAs from some, but not all, of the interfaces attached to the area.
This command blocks all outbound LSAs to provide options for selective blocking of LSAs.
After you apply filters to block the outbound LSAs, the filtering occurs during the database
synchronization and flooding. When a filtering configuration is changed on a interface, all adjacencies
on the interface are set to the Extstart state to restart the database exchange process. In cases where
an LSA has already been flooded on an interface prior to application of the LSA filter, the LSA will not
be flushed out from the remote neighbors. In this situation the user must clear the link state database
and the adjacencies on all remote neighbors to flush out the leaked LSAs or wait for the LSAs to be
aged out.
If you remove the filters, the blocked LSAs are automatically re-flooded. You do not need to reset OSPF
to re-flood the LSAs.
NOTE
You cannot block LSAs on virtual links, and LSA filtering is not supported on sham links.
To apply a filter to an OSPF interface to block flooding of outbound LSAs on the interface, enter the
following command at the Interface configuration level for that interface.
device(config-if-e10000-1/1)# ip ospf database-filter all out
The command in this example blocks all outbound LSAs on the OSPF interface configured on port 1/1.
Syntax: [no] ip ospf database-filter { all | all-external [ allow-default | allow-default-and-type4 ] |
all-summary-external [ allow-default | allow-default-and-type4 ] } out
The all parameter directs the router to block all outbound LSAs on the OSPF interface.
The all-external option directs the router to allow the following LSAs: Router, Network, Opq-Area-TE,
Opq-Link-Graceful and Type-3 Summary while it blocks all Type-4 and Type-5 LSAs unless directed by
one of the following keywords:
allow-default - allows only Type-5 default LSAs.
allow-default-and-type4 - allows Type-5 default LSAs and all Type 4 LSAs.
Block flooding of outbound LSAs on specific OSPF interfaces
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