Solved: Re: PT No Peer - WAAS

nicojk1985 · ‎10-18-2018

Hi everyone,

I am seeing some connections (one or two) in my WAE that appear as passthrough without a clear reason:

WAECore# show tfo connection summary

...

Local IP:Port Remote IP:Port Peer ID ConnType
a.b.c.d:51332 e.f.g.h:80 N/A PT In Progress

WAEBranch# show tfo connection summary

...

Local IP:Port Remote IP:Port Peer ID ConnType
a.b.c.d:51332 e.f.g.h:80 N/A PT No Peer

I have been reading that "PT No Peer" issue appears when the connection does not recognize the other end WAE during the three steps handshake process.

This triggers some questions:

1. Why would this happen only for one (maximum two) connection and not for the rest of the connections I see at the tfo summary?
2. What can I do to troubleshoot these connections?
3. Is there anything I can do to restart those kind of connections from WAE (flush the connection to be filed as per the optimization policies)?

Thanks in advance.

Aleksey Pan · ‎10-18-2018

Hi,

Local IP:Port Remote IP:Port Peer ID ConnType
a.b.c.d:51332 e.f.g.h:80 N/A PT In Progress

- That can be with any new connections that just came to the box, as it doesn't have the full TCP-handshake yet.

- After that it can say like PT no Peer in your case

PT no peer- means there are no 2 WAE in the path,

In your case, you see that connections has been redirected at your core site.

But on another remote site ( e.f.g.h:80 ), it has not been.. Or you might be don't have a WAE at that site.

If you do, check if you redirect this type of connection, srcIP and dstIP on port 80.

To answer your questions:

1. Why would this happen only for one (maximum two) connection and not for the rest of the connections I see at the tfo summary?

- maybe that IP ( remote and/or local) are not in the ACL for wccp or AppNav redirection..

- Or maybe you don't have the WAE at that remote site

2. What can I do to troubleshoot these connections?

- Only way, is to trace this flow, and make sure you have WAE at remote site and you do redirect it
3. Is there anything I can do to restart those kind of connections from WAE (flush the connection to be filed as per the optimization policies)?

- It is not related to the policy-map optimization rules, neither to the Ads that you run on different sites. If it would be, the reason will be different for PT.

Hope this helps!

Regards,

Alex

View solution in original post

Aleksey Pan · ‎10-18-2018

Hi,

Local IP:Port Remote IP:Port Peer ID ConnType
a.b.c.d:51332 e.f.g.h:80 N/A PT In Progress

- That can be with any new connections that just came to the box, as it doesn't have the full TCP-handshake yet.

- After that it can say like PT no Peer in your case

PT no peer- means there are no 2 WAE in the path,

In your case, you see that connections has been redirected at your core site.

But on another remote site ( e.f.g.h:80 ), it has not been.. Or you might be don't have a WAE at that site.

If you do, check if you redirect this type of connection, srcIP and dstIP on port 80.

To answer your questions:

1. Why would this happen only for one (maximum two) connection and not for the rest of the connections I see at the tfo summary?

- maybe that IP ( remote and/or local) are not in the ACL for wccp or AppNav redirection..

- Or maybe you don't have the WAE at that remote site

2. What can I do to troubleshoot these connections?

- Only way, is to trace this flow, and make sure you have WAE at remote site and you do redirect it
3. Is there anything I can do to restart those kind of connections from WAE (flush the connection to be filed as per the optimization policies)?

- It is not related to the policy-map optimization rules, neither to the Ads that you run on different sites. If it would be, the reason will be different for PT.

Hope this helps!

Regards,

Alex

nicojk1985 · ‎10-19-2018

Thanks a lot for your explanation, Aleksey!