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

clear ip bgp * soft

Hello all. What does the "soft" in the above command do? I understand that the above command clears the entire bgp routing table, but what effect does the "soft" have?

Thank you for your thoughts.

3 REPLIES
Silver

Re: clear ip bgp * soft

"soft" reset means clearing the routes recieved from the bgp peer without reseting the session. In other words, soft reset will cause the routers to start processing routing information from scratch and populating bgp table with having to reset the bgp session (TCP port 179).

The "soft" keyword is not required if the 2 routers are running IOS 12.1 and above, because "dynamic refresh" is supported.

Anyway,

here is the documentation:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/iprrp_r/ip2_c1g.htm#1037037

HTH,

Mustafa

New Member

Re: clear ip bgp * soft

Mustafa:

Hello. Yes, I noticed the state change when using the command with and without the "soft" command.

Thanks for your comments,

Robert

New Member

Re: clear ip bgp * soft

hi

the difference is:

the peer relationship is not reset...

which would be a catastrophe in a Real time Env

what is does is ask for updates of the routing info...

from its peer which you specify.,thus mainitaing the relationship and routing info already existing.. as well as getting newest changes from its peers.

hope im right.

if anyone could point out errors..

thankyou

478
Views
0
Helpful
3
Replies
CreatePlease login to create content