Assignment of WAVEs to Buckets WCCPv2

All,
Can anyone explain how WAVEs (caches in WCCP lexicon) are assigned to buckets please?
The context to my question is probably best illustrated by an example:
* You have two CEs (CE-A and CE-B), each with a provider circuit
* Asymmetric routing across the WAN providers
* Four WAVE units registered using WCCPv2
* An assignment mask of 0x0f00 on the source ip (16 bits)
* Therefore, there are four caches and 16 buckets (4 buckets per cache)
How does WCCPv2 ensure buckets 1-4 get assigned to WAVE-A on both CEs?
According to the post below, the assignment is based on WCCP registration time, but I am not confident in that, else rebooting WAVEs or CEs would cause loss of optimisation (unless they were all rebooted together in sequence):
https://supportforums.cisco.com/thread/2225305
This seems like a fundamental part of the WCCP operation, but I can't find any documentation for it.
Many thanks for anyone who can assist.
Regards
James.

Hi James,
Please take a look here :
http://www.cisco.com/en/US/docs/ios/12_2/configfun/configuration/guide/fcf018_ps1835_TSD_Products_Configuration_Guide_Chapter.html#wp1000909
especially bullet point 3, where one of the WAVEs is elected/selected as the lead, and that WAVE controls the bucket assignments.
Know it's an (old) IOS 12.2 document, but that hasen't changed!
What you want to acheive is that you always redirect to the same WAVE from both routers, based on some common criteria.
So if you reboot one of the routers (CEs) the other one has to handle all the traffic, but should still redirect to the same WAVE.
If you reboot one of the WAVEs, this WAVE will deregister and the lead WAVE will inform everyone about the new assignment buckets.If it's the lead WAVE that is rebooted another lead WAVE is selected.
Off course TCP sessions being redirected to the rebooting WAVE will be disrupted and another TCP session will be set up from the client and eventually being redirected to one of the remaining WAVEs.
Hope this answers you question.
Best regards
Finn Poulsen

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Vincent Attachment: coherence-cache-config.xml (*To use this attachment you will need to rename 206.bin to coherence-cache-config.xml after the download is complete.) Attachment: tangosol-coherence.xml (*To use this attachment you will need to rename 207.bin to tangosol-coherence.xml after the download is complete.) Attachment: trace_s2_end.txt (*To use this attachment you will need to rename 208.bin to trace_s2_end.txt after the download is complete.)

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Hello,
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All,
I'd like your feedback on another topic relating to the schema, this
one at a higher level. Basically, the question is whether you think we
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thought about that before, we have to completely revise our flat schema
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support both models in some way for a while (the flat schema, for
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{ Initiator: { Account: { Name: user2, UserID: 104, Host:
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"/etc/syslog", "Host": "dc01"}}}
OK, so what do you all think?
DCorlette
DCorlette's Profile: http://forums.novell.com/member.php?userid=4437
View this thread: http://forums.novell.com/showthread.php?t=419793

Hi Rokie,
What's the difference between Flat & Qualified Flat table?
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HTH,
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