topic Re: PT No Peer - WAAS in Application Networking

PT No Peer - WAAS

nicojk1985 — Thu, 18 Oct 2018 20:09:18 GMT

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.

Re: PT No Peer - WAAS

Aleksey Pan — Fri, 19 Oct 2018 01:28:25 GMT

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

Re: PT No Peer - WAAS

nicojk1985 — Fri, 19 Oct 2018 15:53:09 GMT

Thanks a lot for your explanation, Aleksey!