WCCP on Cisco 2600 router

[jlgarcia]

Im trying to catch data from the internet with a Sun T1 with Inktomi as the caching software, it works with WCCP2 and the connecction is via a 2600 router with the wccp2 enabled and the redirect out in the interfece directly connected to the internet enabled too.

Some web pages download ok but, the problem comes when I try to access pages where I must provide a user and a password, the page never downloads.

Does anybody knows about a problem between the cisco wccp2 implementation and a third part cache boxes?

[ltd]

Hi Luis,

What release of IOS are you running on the 2600 router?

Unfortunately, some IOS releases have some bugs that _may_ be causing compatability issues.

As a general guideline, if you're on the latest 12.0T release (12.0(7)T), the latest 12.1 mainline release or the latest non-deferred 12.1T release, there shouldn't be any problem in IOS with relation to WCCP.

I'd suggest that you contact Inktomi.

If its "all sites" with authentication (even cisco's web-site), then its definitely an Inktomi bug.

Site-Note:

We actually know of a few bugs that they have had in the past, and this sounds like a possible side-effect of one of them (an issue related to the fact that WCCP can use a GRE tunnel to send packets from the router to the cache, thereby reducing the effective MTU, yet in their TCP 3-way handshake they don't set a smaller MSS which means that any fragmentation of large packets will cause things to break).

[jlgarcia]

I have the Cisco IOS(tm) C2600 Software (C2600-IS-M), Version 12.1(3a), RELEASE SOFTWARE (fc1)

ROM: System Bootstrap, Version 12.1(3r)T2, RELEASE SOFTWARE (fc1)

System image file is "flash:c2600-is-mz.121-3a"

cisco 2621 (MPC860) processor (revision 0x200) with 39936K/9216K bytes of memory in my Cisco 2621

and this is the result of the show wccp commands:

Enterprise#sh ip wccp

Global WCCP information:

Router information:

Router Identifier: 192.168.20.2

Protocol Version: 2.0

Service Identifier: 0

Number of Cache Engines: 1

Number of routers: 1

Total Packets Redirected: 89607

Redirect access-list: -none-

Total Packets Denied Redirect: 0

Total Packets Unassigned: 4

Group access-list: -none-

Total Messages Denied to Group: 0

Total Authentication failures: 0

Enterprise#sh ip wccp 0 detail

WCCP Cache-Engine information:

IP Address: 192.168.20.5

Protocol Version: 2.0

State: Usable

Initial Hash Info: 00000000000000000000000000000000

00000000000000000000000000000000

Assigned Hash Info: FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

Hash Allotment: 256 (100.00%)

Packets Redirected: 73836

Connect Time: 1d04h

what tells me that the router is redirecting packets to the caching box. Even Im thinking about placing a sniffer {in a port of the same vlan with span enabled} to see what happend when the request is done.

So I do I have a correct version of the IOS???

Thanks again

[ltd]

Hi Luis,

in order to rule out any possibility of it being a previously-known-and-fixed IOS bug, i'd suggest that you upgrade this c2600 router from 12.1(3a) to 12.1(10).

you should be able to download this from:

http://www.cisco.com/cgi-bin/Software/Iosplanner/Planner-tool/iosplanner.cgi?get_crypto=&data_from=&hardware_name=2620-2621&software_name=&release_name=12.1.10&majorRel=12.1&state=:HW:RL

if the problem still persists after this, then i'd suggest you contact Inktomi support.

cheers,

lincoln.