09-27-2012 01:53 AM - edited 03-04-2019 05:41 PM
Hi team,
We have 12K GSR at one end an 7200 router at other end. ospf configured for our remote offices with 2 links for redundancy.
Primary will be of 100Mbps and secondary will be 34Mbps. But the ospf cost o the links will be showing as 1 for both the links.
higher bandwidth link should has low cost right ?. We have not explicitly defined any reference bandwidth.
Please giude wha coul be the issue.
Thanks & Regards,
Naveen
09-27-2012 01:59 AM
Do you use Fast Ethernet interface for 2 link?
09-27-2012 08:14 PM
Hi Anh,
Thanks for the reply.
We are using one of the sub-interface in Gigabit port for 34Mbps, and One E1 channel from the Sonet controller for 2Mbps connectivity.
So please guide me what could be the issue.
09-28-2012 12:20 AM
Hi naveen,
Can u show the configuration of 2 interface?
thanks
09-27-2012 02:01 AM
Hi Naveen,
Please refer the link for OSPF interface cost table for various interface types:
However, suggest you explicity define the ospf cost on the interface in order to manage your primary and secondary links.
Pls rate if helps !
Best Regards,
Guruprasad R
09-27-2012 02:22 AM
Hello Naveen,
the cost on 34 Mbps should be higher if both costs are 1 this means that ip ospf cost has been used on one of the two links (the 34 Mbps link) or that the auto-reference bandwidth has been lowered from defaul value 8 (but you have noted that this has not been changed)
check configuration with
show run interface type x/y
change the ip ospf cost 1 command or remove it under the serial interface
Do it on boh routers both ends of the link
Hope to help
Giuseppe
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