Answered Question

Hi all,

I currently have a WAAS network in place with 3 remote sites and a data center site running using WCCP for traffic redirection. I am looking into deploying more WAAS to a few more remote sites and I have a couple questions, hoping someone can help clearify. Thanks in advance for any inputs / suggestions !!!

Currently, I have one WAE-674 at the data center and I am looking into adding one more WAE-674 to support more remote sites. Here are my questions:

With two WAEs at the data center, how do I load balance traffic between them using WCCP ? Does WCCP load balance traffic dynamically on its own ?

Thanks again !!!


Correct Answer by Eric Rose about 7 years 3 months ago


WCCP provides reidrection as well as load balancing functionality.

Here is a URL that can help. Let me know if you have any other questions.




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Hi Eric,

One quick question. Can you please tell why I am seeing a lot of pass-through connections between two WAAS enabled sites ? I am seeing a lot of "PT in progress" under ConnType when I run the command "show stat con pass-through". I know I am not redirecting video or voice traffic to the WAE and below are all the data applications that go between these two sites. At the same time I am also seeing a lot connections being optimized.



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Thanks Eric !!!


Eric Rose Wed, 02/03/2010 - 11:45
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There are a couple of possible reasons for pass through connections.

1) the application is set to pass through via application traffic policy


2) the traffic is only going through one WAE

3) the traffic goes through 2 WAE in one direction but not through the same 2 in the return path.

4) the device is overloaded



Eric Rose Wed, 02/03/2010 - 17:41
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The default application policy does have a bunch of rules in pass through by default based on the characterists of the application. Analysis of the pass through connections would determine the reason.

You can take a look at show statistics pass-through and look at the overload field.



Hi Eric,

Below is the output from the 'show statistics pass-through' command. Could you take a look and tell me if there is anything unusual ? I do not see the field for Overload. I do not have WAAS at all locations so it makes sense to see some connections with no peer but I do see some pass-through connection where I have WAAS installed. Please let me know what you find !!! Thank you very much !!!

PT Client:
     Bytes                       31237461320
     Packets                        54188187
PT Server:
     Bytes                       54733150250
     Packets                        57957158
PT In Progress:
     Bytes                      335592318927
     Packets                       413501604

                      Active                    Completed
                      ----------------------    ----------------------
Overall                                   23                   4287696
No Peer                                    2                   1730355
Rjct Capabilities                          0                         0
Rjct Resources                             0                         0
App Config                                 0                     62061
Global Config                              0                         0
Asymmetric                                 0                      2194
In Progress                               21                   2488180
Intermediate                               0                       189
Internal Error                             0                      4289
App Override                               0                         0
Server Black List                          0                       428
AD Version Mismatch                        0                         0
AD AO Incompatible                         0                         0
AD AOIM Progress                           0                         0
DM Version Mismatch                        0                         0

Eric Rose Thu, 02/04/2010 - 17:39
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Interesting that this field is no longer list.

I don't see anything alarming, AFAIK. The Rjct Resources are not increasing.

pass through connections are normal, unless there is a specific entries that you believe should be optimized which aren't.


etamminga Fri, 08/13/2010 - 07:04
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Did you solve the problem.

I see a lot of PT In Progress as well and I can not figure out the source of the problem

We have 3 WAE674 (WCCP) at the core and a WAE512 (InLine) at the edge.




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