From: Duncan Maccubbin (duncan.maccubbin@earthlink.net)
Date: Wed Mar 11 2009 - 10:04:45 ARST
You can put two VSS sup720s in the chassis because they don't have to do VSS.
-----Original Message-----
>From: Dale Shaw <dale.shaw@gmail.com>
>Sent: Mar 11, 2009 7:23 AM
>To: Monica Belluci <mpls1979@gmail.com>
>Cc: Cisco certification <ccielab@groupstudy.com>
>Subject: Re: cisco 6500 VSS with Dual Sup720 3c in One chassi
>
>Hi Monica,
>
>I've only seen VSS demo'd. I don't have any first-hand experience with
>it, but I am familiar with the 6500 series in general. I vaguely
>recall
>
>My understanding from reading the documentation is that the line cards
>in the failed chassis are unavailable until proper operation of that
>supervisor engine is restored (e.g. after a reload). Interfaces in the
>active chassis are available.
>
>I can't find the reference now, but I remember there being a lab you
>could get into to see VSS in action -- hit Cisco.com and do some
>digging. Like you, I found that the Configuration Tool lets you build
>a chassis with multiple VS- supervisor engines. I suspect that's
>because Cisco plan to lift the "only one supervisor engine per
>chassis" restriction one day.
>
>Aside from the product documentation, there is some VSS related info
>in the Data Centre section of Design Zone -- www.cisco.com/go/srnd
>
>cheers,
>Dale
>
>On Wed, Mar 11, 2009 at 9:31 PM, Monica Belluci <mpls1979@gmail.com> wrote:
>> Hi Dale
>> Thanks for your quick reply.
>> If I I implemented VSS with single Sup720 in each core switch and suppose
>> One sup720 module fails what will be the status of line cards belonging to
>> failed core switch Sup720 ?
>> All line cards will work with single Sup720 of Active Switch or Whole
>> Chassis will be down ?
>> I tried to use dynamic configurator and it still allows me to select two
>> Sup720 3c modules for single chassis with 12.2(33)SXI) .
>>
>> Thanks
>> Monica
>>
>> On Wed, Mar 11, 2009 at 11:51 AM, Dale Shaw <dale.shaw@gmail.com> wrote:
>>>
>>> Hi Monica, I loved your work in The Matrix Reloaded.
>>>
>>> On Wed, Mar 11, 2009 at 7:23 PM, Monica Belluci <mpls1979@gmail.com>
>>> wrote:
>>> > Dear All,
>>> >
>>> > Can I use two Sup720 3c modules in One chassis (Chassis A) and two
>>> > Sup720
>>> > 3c modules in One chassis (Chassis B) to implement VSS 1440 between them
>>> > .
>>> > Do VSS support Two Sup720 in One chassi and Two Sup720 in other chassi?
>>> > Can i use Sup720 3C failover in single chassis as I have two Sup720 in
>>> > single chassis?
>>> >
>>> > Any Practical update is appereciable.
>>>
>>> Unless something has changed, VSS only supports a single supervisor
>>> engine per chassis. This was a limitation Cisco were looking at
>>> lifting in subsequent releases.
>>>
>>> The latest ("12.2(33)SXH and later") config guide still talks about 2
>>> chassis and 2 supervisor engines being the max. There is also this
>>> statement..
>>>
>>> "The virtual switching system does not support supervisor engine
>>> redundancy within a chassis."
>>>
>>> ..which seems pretty definitive.
>>>
>>> Essentially the supervisor engines in each chassis form an
>>> active/standby relationship similar to the way two supervisor engines
>>> in a single chassis do.
>>>
>>> cheers,
>>> Dale
>
>
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