Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

connecting ospf area 0 and area 1 by two ABR's

Can routing loops occur when I connect two ospf area's (0 and 1) by two ABR's ?

If yes, how can I prevent them ?

1 REPLY

Re: connecting ospf area 0 and area 1 by two ABR's

The problem you will have is if the link between the ABRs get broken and you are summarizing routes into area 0. Some routes may get blackholed (if one ABR is advertising a route under the summarized route that he no longer can get to).

Having 2 abr's is common as it adds redundancy and load balancing. Loops shouldn't be a problem.

Steve

309
Views
0
Helpful
1
Replies