WCCP causing high cpu utilization on 7613

[jose.orfao]

Hi

We installed 2x WAE and 1 x Central Manager as per diagram at the Core, rolling out more WAE devices (appliances and SRE-900) at the branches.

I configured as follows:

Configured IP wccp version 2

Ip wccp 61

Ip wccp 62

On the LAN

Configured ip wccp 61 redirect in

On the WAN

Configured ip wccp 62 redirect in

On the WAE interfaces configured ip wccp redirect exclude

On  COR 1 it is giving us a 90% cpu util while COR 2 is at 5%

Both 7613's config of wccp are identical, IP CEF is enabled, both WAE 7341 appliances configs are identical.

Once we remove on the LAN side  ip wccp 61 redirect in, the cpu util on COR1 comes down to 5%.

Does anyone have an idea why? Your help is greatly appreciated. Many thanks

[Bhavin Yadav]

Hi Jose,

There are couple of things needed in order to narrow down the problem.

Can you paste cli output of --> " sh run | in wccp " from WAE?

Plus also paste sh ip wccp 61 detail and sh ip wccp 62 detail output. You can remvoe the ip addresses. Looks to me as load balancing issue and only one of the 7613 is taking the load. BTW, what IOS version you are running on 7613?

Regards.

[jose.orfao]

Hi Bhavin

Many thanks for your reply, I have narrowed down to one link, going down to DIS3, I removed the ip wccp 61 redirect in from that interface and the CPU is normal, Below is the info you requested. I was thinking in moving the WAE devices to the DIS chassis, and monitor the outcome.

Core 1

c7600rsp72043_rp Software (c7600rsp72043_rp-ADVENTERPRISEK9-M), Version 12.2(33)SRE2,

GNUMCOR1#sh ip wccp 61 detail
WCCP Client information:
        WCCP Client ID:          192.168.xx.xx
        Protocol Version:        2.0
        State:                   Usable
        Redirection:             GRE
        Packet Return:           GRE
        Assignment:              HASH
        Initial Hash Info:       00000000000000000000000000000000
                                 00000000000000000000000000000000
        Assigned Hash Info:      FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
                                 FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        Hash Allotment:          256 (100.00%)
        Packets s/w Redirected:  5197687
        Connect Time:            2d14h
        GRE Bypassed Packets
          Process:               0
          CEF:                   1
          Errors:                0

GNUMCOR1#sh ip wccp 62 detail
WCCP Client information:
        WCCP Client ID:          192.168.xx.xx
        Protocol Version:        2.0
        State:                   Usable
        Redirection:             GRE
        Packet Return:           GRE
        Assignment:              HASH
        Initial Hash Info:       00000000000000000000000000000000
                                 00000000000000000000000000000000
        Assigned Hash Info:      FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
                                 FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        Hash Allotment:          256 (100.00%)
        Packets s/w Redirected:  71001191
        Connect Time:            2d14h
        GRE Bypassed Packets
          Process:               0
          CEF:                   0
          Errors:                0

sh run | in wccp
wccp router-list 8 192.168.xx.xx 172.xx.xx.xx
wccp tcp-promiscuous service-pair 61 62 failure-detection 30
wccp tcp-promiscuous service-pair 61 62 router-list-num 8
wccp version 2

Core 2

Cisco IOS Software, c7600rsp72043_rp Software (c7600rsp72043_rp-ADVENTERPRISEK9-M), Version 12.2(33)SRE2,

GNUMCOR2#sh ip wccp 61 detail
WCCP Client information:
        WCCP Client ID:          192.168.yy.yy
        Protocol Version:        2.0
        State:                   Usable
        Redirection:             GRE
        Packet Return:           GRE
        Assignment:              HASH
        Initial Hash Info:       00000000000000000000000000000000
                                 00000000000000000000000000000000
        Assigned Hash Info:      FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
                                 FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        Hash Allotment:          256 (100.00%)
        Packets s/w Redirected:  22954398
        Connect Time:            2d14h
        GRE Bypassed Packets
          Process:               0
          CEF:                   0
          Errors:                0

GNUMCOR2#sh ip wccp 62 detail
WCCP Client information:
        WCCP Client ID:          192.168.yy.yy
        Protocol Version:        2.0
        State:                   Usable
        Redirection:             GRE
        Packet Return:           GRE
        Assignment:              HASH
        Initial Hash Info:       00000000000000000000000000000000
                                 00000000000000000000000000000000
        Assigned Hash Info:      FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
                                 FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        Hash Allotment:          256 (100.00%)
        Packets s/w Redirected:  17373518
        Connect Time:            2d14h
        GRE Bypassed Packets
          Process:               0
          CEF:                   1
          Errors:                0

GNUMNUMWAE3#sh run | inc  wccp 
wccp router-list 8 192.168.yy.yy 172.yy.yy.yy
wccp tcp-promiscuous service-pair 61 62 failure-detection 30
wccp tcp-promiscuous service-pair 61 62 router-list-num 8
wccp version 2
GNUMNUMWAE3#