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Beginner

Regarding ospf cost

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

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5 REPLIES 5
Highlighted
Beginner

Regarding ospf cost

Do you use Fast Ethernet interface for 2 link?

Highlighted
Beginner

Regarding ospf cost

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.

Highlighted
Beginner

Regarding ospf cost

Hi naveen,

Can u show the configuration of 2 interface?

thanks

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Rising star

Regarding ospf cost

Hi Naveen,

Please refer the link for OSPF interface cost table for various interface types:

http://www.watchguard.com/help/docs/edge/10/en-us/content/en-us/dynamicrouting/ospf_interface_cost_f.html

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

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Hall of Fame Expert

Re: Regarding ospf cost

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