Solved

OSPF Redundancy

Posted on 2009-04-14
3
679 Views
Last Modified: 2012-05-07
I currently have a network ring comprised of 9 Catalyst 3560's.  they currently do spanning tree, and I place a "dead" link across my slowest link so that traffic all flows one direction until the ring is broke.  I want to migrate away from spanning tree, and use OSPF.  I already have OSPF in place, but traffic flows in all directions around the ring.  I realize that is the nature of OSPF, but is there some way I can make the link i don't want any traffic on look less attractive to OSPF so that it doesnt send any traffic down it at all unless another link is broke just like spanning tree?  I have tried messing with priorities and path costs with no avail.  is there someway i can make OSPF think there is more than 1 hop on a particular link?
0
Comment
Question by:HunTelWebProgrammer
  • 2
3 Comments
 
LVL 43

Expert Comment

by:JFrederick29
ID: 24138990
Using port cost on both ends of the slow link should take care of it.

ip ospf cost 1000000
0
 
LVL 1

Author Comment

by:HunTelWebProgrammer
ID: 24139316
ok i set the max cost on the links and it appears to have helped.  in addition to this, when i replace these 3560's with 4948's and my uplinks change to 10Gig, is there something i need to do for OSPF to recognize the uplinks bandwidth of 10Gig as apposed to 1Gig? I thought i read somewhere that ospf can only determine bandwidth up to 1 gig unless additional configuration is done.
0
 
LVL 43

Accepted Solution

by:
JFrederick29 earned 500 total points
ID: 24139355
Yup, you need to set the "auto cost" command on all OSPF routers.

router ospf 1
auto-cost reference-bandwidth 10000
0

Featured Post

Better Security Awareness With Threat Intelligence

See how one of the leading financial services organizations uses Recorded Future as part of a holistic threat intelligence program to promote security awareness and proactively and efficiently identify threats.

Join & Write a Comment

#Citrix #Citrix Netscaler #HTTP Compression #Load Balance
Data center, now-a-days, is referred as the home of all the advanced technologies. In-fact, most of the businesses are now establishing their entire organizational structure around the IT capabilities.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.

743 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now