[Xorp-users] Xorp system as DR in backbone = disaster

[Williams, Mark]

This morning, I attempted to deploy a Xorp system configured as an OSPF ABR. One interface was in the backbone, and all others were in area 0.0.0.2. When the interface in the backbone peered with the other routers in the backbone, the Xorp system became the DR (it had the highest priority).

When it became the DR, all of the other routers in the backbone lost their routes through other backbone-connected routers, including the default route, which is injected by an ASBR also in the backbone. The whole topology fell apart. Other routers in the backbone showed that they were peered with the Xorp system, and that it was the DR, but they were not picking up any routes from it. The system has an iptables rule set, but nothing in the logs indicated that any OSPF related traffic was dropped.

Has anyone had similar problems with Xorp as DR, particularly if it is the backbone area?

-Mark Williams

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