Yes, this should be possible. WCCP will load balance traffic off multiple routers (up to 32) to multiple WCCP clients (up to 32). However, be aware if you make both DC Web Proxies part of the same WCCP cluster, both Web Proxies will see traffic from both DC routers due to the load balancing algorithms (hash or mask assignments) so there may be some traffic routing back and forth between the DCs.
I thought this (your concept) would be fine as well but the WCCP configuration guide for the Catalyst 4500 switch states that the cache engines should not be separated by a Layer 3 hop. That's the part that confuses me.
Both are correct, for software based IOS routers (7206, 38xx, 28xx, 18xx) and Cat6K+SUP720, using GRE-Redirect, the WCCP client can be multiple L3 hops away.
For Hardware based redirection, including most Catalyst based platforms, you have to use L2-redirect which requires that your WCCP client be L2 adjacent which won't work in your situation unless you have L2 spanning both DCs.
Can you move WCCP to a platform that supports GRE-redirect like a 7206 or ISR based router? Another possibility would be to use a L4-7 switching plafform
Thanks for the clarification. Using a layer 7 switch (load balancer) will introduce another point of failure. Due to the fact that there is a layer 3 connection between DCs, I will not be able to cluster the LBs.....giving me another component to worry about :-)
A solution like GSS could help in this regard but if I will be introducing DNS load balancing into the mix, WCCP may not be the most attractive option.
If you can't use a IOS based GRE-redirect platform, another other option would be to do 2 WCCP clusters locally using L2-redirect. That way you can still do your redirects, however if a proxy fails, 1/2 of your traffic doesn't get proxied unless you doubled up locally on hardware.
However, this also reduces DC to DC traffic that WCCP would increase due to the load balancing, however adds incremental up front $$ to the implementation.
Introduction This article will help you understand the steps on how to
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Introduction This article will help you understand and educate the
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==================== VIC FNIC driver does not support Virtual Volumes (
second level LUN ID ) An enhancement request has been created to track
this feature - CSCux64473 UPDATE - 12-14-2016 We made some traction on
the enhancement request - The Fix is in t...