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

tcp adjust-mss

Hello All,

I need the command (ip tcp adjust-mss) to solve problems with l2tp tunnels. I have vxr 7206 with IOS 12.2(14)T , but I cant find the command. In which feature set should I find this command ?

9 REPLIES

Re: tcp adjust-mss

Its a interface mode command. First check under the interface.

New Member

Re: tcp adjust-mss

yes I have already checked under the interface mode, it doesn't exist there, there is only (ip tcp compression-connections) & (ip tcp header-compression)

Re: tcp adjust-mss

The command used to be known as "ip adjust-mss" before it was changed to ip tcp adjust-mss. So its possible that the deprecated command exists. Check with ip a? and see what options it list..

Mean while I will check with Software advisor if that command is supported.

Hall of Fame Super Silver

Re: tcp adjust-mss

According to notes that I found at this URL:

http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide09186a00804247fc.html

it was introduced in 12.2(4)T as the syntax ip adjust-mss and in 12.2(8)T the syntax was changed to ip tcp adjust-mss. So if the router is running 12.2(14)T I would think that the command should be there. I did not find anything in the notes that indicated that there was a feature set dependency.

What interface were you trying to do this on. The notes indicate that it should be an Ethernet interface of some type.

HTH

Rick

New Member

Re: tcp adjust-mss

First I amd sorry , I typed the ios version of another router. The version I have is 12.2(27) . The interface is fastethernet . there is no ip adjust-mss or ip tcp adjust-mss under it.

Hall of Fame Super Silver

Re: tcp adjust-mss

Tamer

Actually this makes more sense knowing that you gave the version from another router. If the router you are trying on is running 12.2(27) which is main line code the command does not exist in that version. You would need to have something in the 12.2T train or in 12.3 (or perhaps 12.3T) to get this command. As I indicated in my previous post I do not see anything that indicates a feature set dependency, it is just a version issue. If you upgrade the router IOS to a version that has the command you will be able to use ip tcp adjust-mss.

HTH

Rick

New Member

Re: tcp adjust-mss

yes you are right now I use ver 12.2(15)T17 and the command is working fine. but I faced another problem that the cpu has gotten much higher (almost triple) after I applied it as if like ip cef isnt working while it is enabled.

Note: I use this router to terminate l2tp vpdn sessions on it. any ideas about this?

New Member

Re: tcp adjust-mss

when I serached for ios comparison between the 2 versions , I found that feature (CEF Switching for Routed Bridge Encapsulation) is missing in the new ios . would that be the problem cause of high cpu ?.

Hall of Fame Super Silver

Re: tcp adjust-mss

Tamer

I doubt that this is the cause. You have not told us that your were using Routed Bridge Encapsulation. Is that part of the router config? Perhaps it would help if you would post the router config so we can analyze the problem more accurately.

HTH

Rick

384
Views
0
Helpful
9
Replies
CreatePlease to create content