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[Bug 330] New: routes disappear with 'could not determine nexthop' log entry
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http://bugzilla.quagga.net/show_bug.cgi?id=330

Summary: routes disappear with 'could not determine nexthop' log
entry
Product: Quagga
Version: CVS
Platform: Other
OS/Version: Linux
Status: NEW
Severity: normal
Priority: Very High
Component: ospfd
AssignedTo: maintainers@quagga.net
ReportedBy: windo@p6drad-teel.net


I have a test setup with two openvpn tunnels between two routers. I have been
testing to see if I can failover from one link to another in a suitable time and
ran into a possible bug.

It happens when I fail block one link, wait for quagga to apply the route
through the other link (with higher cost), failback to the original tunnel, wait
for around 5-10 minutes and block the original tunnel again. Now, this time
ospfd logs:

OSPF: ospf_nexthop_calculation(): could not determine nexthop for link

and removes all routes about 5 seconds (5 seconds is my hello timer interval)
before dead timer reaches 0. After that, routes through the other failover link
(the one with the higher cost) are brought up.



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