Technical data

ServerIron Switching and Routing Guide

NOTE: The set-metric parameter does not apply to static routes.

Learning RIP Default Routes

By default, the software does not learn RIP default routes. To enable learning of RIP default routes, enter the

following commands:

ServerIron(config)#interface ve 1

ServerIron(config-vif-1)#ip rip learn-default

Syntax: [no] ip rip learn-default

Enabling Poison Reverse or Split Horizon

RIP can use the following methods to prevent routing loops:

• Split horizon – The ServerIron does not advertise a route on the same interface as the one on which the

ServerIron learned the route.

• Poison reverse – The ServerIron assigns a cost of 16 (“infinite” or “unreachable”) to a route before advertising

it on the same interface as the one on which the ServerIron learned the route. This is the default.

These methods are in addition to RIP’s maximum valid route cost of 15.

To enable split horizon, enter the following commands:

ServerIron(config)#interface ve 1

ServerIron(config-vif-1)#no ip rip poison-reverse

Syntax: [no] ip rip poison-reverse

OSPF

The ServerIron supports OSPF RFC 1583 by default. Optionally, you can enable support for RFC 2178.

You can configure the following OSPF parameters:

• Global parameters:

• Areas (standard, backbone, stub, and NSSA)

• Area ranges

• Virtual links

•Default metric

• Reference bandwidth for the default cost of OSPF interfaces

• Route path load sharing

• Default route origination

• Shortest Path First (SPF) timers

• External route summarization

• Redistribution

• Redistribution metric type

• LSA pacing interval

• OSPF traps

• Database overflow interval