SRE WAAS question

jason.kwang · ‎07-26-2011

Got 2 x 2921 SRE WAAS, one at DR center, one at main office. I read from Cisco manual.

On DR,

Wan Interface configured ip wccp 61

LAN interface configured ip wccp 62

On Main office'

WAN interface configured ip wccp 62

LAN interface configured ip wccp 61

Is this correct ?

On main office, when I show ip wccp

LAN interface has no packets redirected even I generate traffic by ping to DR. What"s wrong ?

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Michael Korenbaum · ‎07-26-2011

Hi Teck,

I would first make sure you have WCCP configured appropriately on both the SRE and the routers, and WCCP is operational.

Router:

pdi-2821-rtp#sh ip wccp 61 det

WCCP Client information:

WCCP Client ID: 14.110.3.132

Protocol Version: 2.0

State: Usable

Redirection: GRE

Packet Return: GRE

Assignment: HASH

Initial Hash Info: FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

Assigned Hash Info: FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

Hash Allotment: 256 (100.00%)

Packets s/w Redirected: 6008

Connect Time: 17:57:32

Bypassed Packets

Process: 0

CEF: 0

Errors: 0

pdi-2821-rtp#sh ip wccp 62 det

WCCP Client information:

WCCP Client ID: 14.110.3.132

Protocol Version: 2.0

State: Usable

Redirection: GRE

Packet Return: GRE

Assignment: HASH

Initial Hash Info: FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

Assigned Hash Info: FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

Hash Allotment: 256 (100.00%)

Packets s/w Redirected: 13607

Connect Time: 17:58:09

Bypassed Packets

Process: 0

CEF: 0

Errors: 0

SRE:

pdi-594-rtp#sh wccp status

WCCP version 2 is enabled and currently active

pdi-594-rtp#

pdi-594-rtp#sh wccp gre

Transparent GRE packets received: 20169 -----> this should be incrementing assuming GRE redirect

Transparent non-GRE packets received: 0 ----> this will increment if SRE is configured for L2 redirect

Transparent non-GRE non-WCCP packets received: 0

Total packets accepted: 9130

Once confirmed WCCP is usable for both services and active on the SRE you need to ensure your TCP flows are going to hit the interfaces you've configured for wccp 61 and 62 redirect in.

The best way to confirm this is perform a traceroute from a test PC to a test server and vice-versa, ensure that one of the L3 hops on either side (LAN or WAN depending on perspective) hits one of the interfaces you have a wccp redirect in statement defined.

The most likely reason you are not seeing traffic redirected on 61 at the main office site is because traffic from your LAN out to the remote DR site is not hitting that interface (confirm with traceroute).

Also, ping packets will not be redirect via WCCP since these are ICMP packets, and service 61/62 for WAAS is TCP promiscuous (e.g. all TCP packets only).

Hope this helps,

Mike Korenbaum

Cisco Data Center PDI Help Desk

http://www.cisco.com/go/pdihelpdesk

Ahmad Basel Jaber · ‎07-26-2011

Hi Ping,

As long as you have one WAAS on each site it should not make any difference what service group you are using on each interface, but for future expansion (enable 62 on WAN interfaces and 61 on LAN interfaces).

The WCCP 61/62 groups will redirect the TCP traffic only, so your ICMP test is not valid, if the SRE is correctly registered with the router and you are passing TCP traffic you should see the WCCP counters increasing.

Best regards,

Ahmad

jason.kwang · ‎07-26-2011

Thanks for all of your help. I using inbound redirect list

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