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Sidewinder G2 6.1.1 Administration Guide - Glossary of Technical ...

Sidewinder G2 6.1.1 Administration Guide - Glossary of Technical ...

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Configuring<br />

"passive" OSPF<br />

Other<br />

implementation<br />

details<br />

Configuring "passive" OSPF<br />

You can configure and run OSPF through the <strong>Sidewinder</strong> <strong>G2</strong><br />

WITHOUT affecting the <strong>Sidewinder</strong> <strong>G2</strong> routing tables. To do this, you<br />

must edit the edit /etc/server.conf file as follows:<br />

1. Using a text editor <strong>of</strong> your choice, find the entry:<br />

2.<br />

server(gated-unbound ...........)<br />

Change the args[-N] to args[-n -N].<br />

3. Save the file.<br />

4. Stop and start the gated server from the Services Configuration -><br />

Servers menu.<br />

Important: In order for the <strong>Sidewinder</strong> <strong>G2</strong> to correctly pass data, static routes must<br />

have been previously defined.<br />

As with any routing protocol, OSPF passes routable addresses. This<br />

defeats the purpose <strong>of</strong> NAT at the <strong>Sidewinder</strong> <strong>G2</strong> running OSPF.<br />

However, NAT can still be performed at the ASBR.<br />

gated supports a method to "query" remote gated implementations<br />

about their current state and information. This is done via the ospf<br />

monitor command. For security, the ospf monitor command is not<br />

supplied on the <strong>Sidewinder</strong> <strong>G2</strong> and it does not accept queries from<br />

remote gated instances.<br />

Filtering <strong>of</strong> routes should not be performed within an area. This leads<br />

to inconsistent link state databases. In turn, the Dijkstra algorithm will<br />

probably end up calculating routing loops. The <strong>Sidewinder</strong> <strong>G2</strong> will<br />

support route filtering when it supports running as an ABR.<br />

Configuring Dynamic Routing with OSPF C-13

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