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Internet Protocol, Transport Control Protocol, Network protocols, Routing, Routers, IP aliases, Routes, Ethernet
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debuser
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Post subject: Quagga ospf neighbour stuck in ExStart/DROther state | Posted: Mon Dec 12, 2011 4:12 pm |
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Joined: Thu Aug 06, 2009 2:48 am Posts: 105
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Quagga ospf neighbour stuck in ExStart/DROther state
After setting up ospf over gre over ipsec, I noticed that the neighbours were stuck in "ExStart/DROther" state. This was because I adjusted the MTU only on one tunnel end-point (MTU adjustment is necessary for GRE and IPsec encapsulation). Code: quagga-router# sh ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface RXmtL RqstL DBsmL 172.16.0.34 128 Full/DROther 5.573s 172.16.0.41 tun0:172.16.0.42 0 0 0 172.16.0.5 1 ExStart/DROther 4.140s 172.16.0.45 tun1:172.16.0.46 0 0 0
Setting the same MTU value on both GRE endpoints fixed the issue.
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