Re: OSPF virtual link and cost

From: shiran guez (shiranp3@gmail.com)
Date: Sat Jan 05 2008 - 19:35:34 ARST


cost 65535 is the highest cost of OSPF if you set all your interfaces to
cost of 65535 it is like you are doing stub router in EIGRP, there is a
command for that if you want:

max-metric router-lsa ?
  external-lsa Override external-lsa metric with max-metric value
  include-stub Set maximum metric for stub links in router-LSAs
  on-startup Set maximum metric temporarily after reboot
  summary-lsa Override summary-lsa metric with max-metric value

the Virtual Link is not an actual logical interface like tunnel there is no
traffic going over the virtual link it is used to bridge the backbone area
(transit area) of OSPF so if you have a stub router you cant have also use
it to transit traffic.

On Jan 5, 2008 10:44 PM, Luan Nguyen <luan.m.nguyen@gmail.com> wrote:

> Do you guys know that virtual link depends on cost? If the cost =>65535
> then it will die?
> If you set the auto-cost reference-bandwidth to say...100000, then most
> likely, virtual link over serial T1 links will die.
> If you have a requirement to change the auto-cost ref-bandwidth to 100000,
> how do you keep the virtual link up?
>
> thanks.
>
> -lmn
>
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-- 
Shiran Guez
MCSE CCNP NCE1
http://cciep3.blogspot.com
http://www.linkedin.com/in/cciep3


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