Switching

I have an EX switch campus network and running OSPF I have ended up with several equal cost routes in the routing table of many of my switches.  Some of this is good but there are some that I want to adjust the metric or administrative distance to keep it from becoming an active route.  What is the best way to do this in JUNOS on the EX switches.  Should I adjust the metric or AD/Preference?  All connections are gig/fiber/sfp connections.  All are P2P links and I have the ISV or vlan.xy interface in protocols ospf. 

I hope this makes sense.

Can someone help me with the command line set.

Thanks

I think this will work.

http://www.juniper.net/techpubs/en_US/junos12.3/topics/reference/configuration-statement/maximum-paths-edit-routing-options.html

give maximum-paths 1

Let me know whether this works.

I would increase the cost (metric) of the link you want to become less attractive..... Don't mess with the prefrence here: it tells how the route is learned: ospf. The mechanisism in any linkste protocol is cost..

You are correct, the metric and preference are different.

to increase the cost of the link in ospf, when you add the interface to the OSPF area, you set the cost there. The preference is for the protocol selection as to which protocol is prefered over the other, lower is better. Cost, is which link is selected based on the cost, lower is better.

http://www.juniper.net/techpubs/en_US/junos13.1/information-products/pathway-pages/config-guide-routing/config-guide-ospf.pdf#search=%22set%20spf%20cost%22
[edit]
set protocols ospf area 0.0.0.0 interface fe-1/0/1metric 5