WAAS with WCCP

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 !!!

Danny

I have this problem too.
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Correct Answer by Eric Rose about 6 years 11 months ago

Hi,

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.

http://www.cisco.com/en/US/docs/app_ntwk_services/waas/waas/v413/configuration/guide/traffic.html#wp1041490

Thanks

Eric

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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.

Internet

SAP

LotusNotes email / Sametime

Cisco Agent Desktop

Windows AD

Thanks Eric !!!

D.

Eric Rose Wed, 02/03/2010 - 11:45

Hi,

There are a couple of possible reasons for pass through connections.

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

     http://www.cisco.com/en/US/docs/app_ntwk_services/waas/waas/v413/configuration/guide/apx_apps.html

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

Thanks

Eric

Eric Rose Wed, 02/03/2010 - 17:41

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.

http://www.cisco.com/en/US/docs/app_ntwk_services/waas/waas/v413/command/reference/execmds.html#wp2876338

Thanks,

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

HI,

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.

Thanks.

etamminga Fri, 08/13/2010 - 07:04

Hi,

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.

Regards,

Erik

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