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Configure default route origination – Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide User Manual

Page 277

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Router OSPF: Enabled

Nonstop Routing: Disabled

Graceful Restart: Disabled

Graceful Restart Helper: Enabled

Graceful Restart Time: 120

Graceful Restart Notify Time: 0

Redistribution: Disabled

Default OSPF Metric: 50

OSPF Auto-cost Reference Bandwidth: Disabled

Default Passive Interface: Enabled

OSPF Redistribution Metric: Type2

OSPF External LSA Limit: 1447047

OSPF Database Overflow Interval: 0

RFC 1583 Compatibility: Enabled

Router id: 207.95.11.128

Interface State Change Trap: Enabled

Virtual Interface State Change Trap: Enabled

Neighbor State Change Trap: Enabled

Virtual Neighbor State Change Trap: Enabled

Interface Configuration Error Trap: Enabled

Virtual Interface Configuration Error Trap: Enabled

Interface Authentication Failure Trap: Enabled

Virtual Interface Authentication Failure Trap: Enabled

Interface Receive Bad Packet Trap: Enabled

Virtual Interface Receive Bad Packet Trap: Enabled

Interface Retransmit Packet Trap: Disabled

Virtual Interface Retransmit Packet Trap: Disabled

Originate LSA Trap: Disabled

Originate MaxAge LSA Trap: Disabled

Link State Database Overflow Trap: Disabled

Link State Database Approaching Overflow Trap: Disabled

OSPF Area currently defined:

Area-ID Area-Type Cost

0 normal 0

OSPF Interfaces currently defined:

Ethernet Interface: 3/1-3/2

ip ospf md5-authentication-key-activation-wait-time 300

ip ospf cost 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
The device 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.

Configure default route origination

FastIron Ethernet Switch Layer 3 Routing Configuration Guide

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