WCCP Slow Performance

johan.lagrand · ‎10-09-2015

Hello,

I'm doing a POC of WAAS devices with one Accelerator in inline mode and the other in WCCP.

The WAVE in WCCP is configured as follow

interface GigabitEthernet 0/1
ip address 1.1.1.2 255.255.255.252
exit

wccp router-list 7 1.1.1.1
wccp tcp-promiscuous service-pair 61 62
router-list-num 7
assignment-method hash hash-source-ip
redirect-method gre
egress-method wccp-gre
enable
exit

The routeur as WCCP server on the Datacenter site has the following configuration

ip cef
ip wccp 61
ip wccp 62

interface GigabitEthernet0/0/0
description WCCP DEVICE
ip address 1.1.1.1 255.255.255.252
ip wccp redirect exclude in
negotiation auto

interface GigabitEthernet0/0
description WAN
ip address <WAN-IP>
ip wccp 61 redirect in
load-interval 30
duplex auto
speed auto
!
interface GigabitEthernet0/1
description LAN
ip address <LAN-IP>
ip wccp 62 redirect in
duplex auto
speed auto

With that basic configuration we had slow performance, as there are no waas devices.

All interfaces are in full duplex mode (switch, router, WAAS device).

We can see that all trafic is match by the TFO,DRE,LZ policy in the show statistics connection.

The WCCP information on the router shows that the communication between the WAAS and the router is OK.

HQ-RTR#show ip wccp
Global WCCP information:
Router information:
Router Identifier: X.X.X.X
Protocol Version: 2.0

Service Identifier: 61
Number of Service Group Clients: 1
Number of Service Group Routers: 1
Total Packets s/w Redirected: 33552
Process: 0
CEF: 33552
Service mode: Open
Service Access-list: -none-
Total Packets Dropped Closed: 0
Redirect Access-list: -none-
Total Packets Denied Redirect: 0
Total Packets Unassigned: 0
Group Access-list: -none-
Total Messages Denied to Group: 0
Total Authentication failures: 0
Total GRE Bypassed Packets Received: 30551

Service Identifier: 62
Number of Service Group Clients: 1
Number of Service Group Routers: 1
Total Packets s/w Redirected: 71378
Process: 0
CEF: 71378
Service mode: Open
Service Access-list: -none-
Total Packets Dropped Closed: 0
Redirect Access-list: -none-
Total Packets Denied Redirect: 0
Total Packets Unassigned: 0
Group Access-list: -none-
Total Messages Denied to Group: 0
Total Authentication failures: 0
Total GRE Bypassed Packets Received: 44498

I've done the test with both WAAS device in inline mode and we notice that the traffic is well accelerated and the compression is performed.

So It means that the policy configuration is good but the problem is in the WCCP configuration, either on the router, either on the WAAS device.

Any ideas ?

Thanks

Johan

finn.poulsen · ‎10-09-2015

Hi Johan,

What model of router and what IOS version are you running ?

What is the CPU utilization of the router with WCCP enabled.

BTW: You don't need the "ip wccp redirect exclude in" when only doing "redirect in" on the LAN and WAN interface. This command is only required when "redirect out" is needed. Not that it should help on the performance.

Best Regards

Finn

johan.lagrand · ‎10-09-2015

Hi Finn,

Thanks for the reply ;)

The CPU is not impacted by the WCCP configuration, less than 5%

Here is the show version

ROUTEUR-SIEGE#show ver
Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.1(1)T1, RELEASE SOFTWARE (fc2)
...

ROM: System Bootstrap, Version 15.0(1r)M9, RELEASE SOFTWARE (fc1)

HQ-RTR uptime is 3 hours, 16 minutes
System returned to ROM by power-on
System image file is "flash:c2900-universalk9-mz.SPA.151-1.T1.bin"
Last reload type: Normal Reload

...

Cisco CISCO2901/K9 (revision 1.0) with 1007616K/40960K bytes of memory.
Processor board ID FCZ1504C7C5
2 FastEthernet interfaces
3 Gigabit Ethernet interfaces
1 Virtual Private Network (VPN) Module
DRAM configuration is 64 bits wide with parity enabled.
255K bytes of non-volatile configuration memory.
254464K bytes of ATA System CompactFlash 0 (Read/Write)

I will remove the redirect exclude and keep you inform,

Regards