cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
1202
Views
0
Helpful
5
Replies

Regarding ospf cost

ncnaveen_arasu
Beginner
Beginner

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

5 Replies 5

mr Anh
Beginner
Beginner

Do you use Fast Ethernet interface for 2 link?

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.

Hi naveen,

Can u show the configuration of 2 interface?

thanks

guruprasadr
Rising star
Rising star

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

Giuseppe Larosa
Hall of Fame Master Hall of Fame Master
Hall of Fame Master

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

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Recognize Your Peers