From: Mike Harrison (michael.h4@blueyonder.co.uk)
Date: Wed Apr 16 2008 - 16:25:25 ART
Hi
I have found a small issue with virtual links. If the the cost of the link
is 65535 (max ospf can use) then the virtual link wont come up;
OSPF_VL0 is down, line protocol is down
Internet Address 0.0.0.0/0, Area 0
Process ID 1, Router ID 150.11.4.4, Network Type VIRTUAL_LINK, Cost: 65535
FastEthernet0/0 is up, line protocol is up
Internet Address 129.11.45.4/24, Area 1
Process ID 1, Router ID 150.11.4.4, Network Type BROADCAST, Cost: 65535
But if you reduce it by 1 then it comes up;
OSPF_VL0 is up, line protocol is up
Internet Address 129.11.45.4/24, Area 0
Process ID 1, Router ID 150.11.4.4, Network Type VIRTUAL_LINK, Cost: 65534
FastEthernet0/0 is up, line protocol is up
Internet Address 129.11.45.4/24, Area 1
Process ID 1, Router ID 150.11.4.4, Network Type BROADCAST, Cost: 65534
When it is maxed the ospf neighbor comes up and routes are valid, just
virtual links wont come up. I realise that this isnt going to happen in real
life unless you crank up the auto-cost ref bw and have a 64k interface -
just curious if anyone has an explaintion.
Mike
Pass the CCIE in six weeks, Guaranteed!
http://www.certscience.com/CCIE
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