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ScreenOS Cookbook by Sunil Wadhwa, Joe Kelly, Ken Draper, David Delcourt, Vik Davar, Stefan Brunner

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16.16. Troubleshoot OSPF

Problem

You need to use debug commands to troubleshoot an OSPF issue.

Solution

Enable OSPF debug:

	FIREWALL-A-> clear dbuf
	FIREWALL-A->debug ospf all

Clear the interface, connect/disconnect a link, or simply wait for 60 seconds. It depends on what you want to monitor.

	FIREWALL-A-> undebug osfp all
	FIREWALL-A->get dbuf stream

Review the logs.

Discussion

Before you start detailed troubleshooting, look for these common sources of errors:

First, you need to ensure that you have physical connectivity to the neighbor. An easy way to check this is with get interface and ping, to see whether the interface is physically and administratively up and has connectivity to its neighbor. You may have to enable ping on an interface with set interface e0/0 manage ping to be able to ping. On broadcast and NBMA, every device on the segment should be able to ping any other device on the same segment. On point-to-multipoint networks, only hubs may be able to ping the spoke (and vice versa, but spokes may not be able to ping each other), and on point-to-point networks, devices may not be able to ping each other at all. Addressing on point-to-point links is optional with ...

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