From: James Ventre (messageboard@ventrefamily.com)
Date: Tue Jul 25 2006 - 15:30:06 ART
> In our case, our servers are connected to two
> separate switches using a failover NIC team.
Yes, that's a good SOP, as long as those two separate switches aren't
stacked. It's semantic's .... is a stacked pair of switches considered
one switch or two?
James
Guyler, Rik wrote:
> If you connect the servers into a single device of any sort it becomes a
> single point of failure. In our case, our servers are connected to two
> separate switches using a failover NIC team. But, that's somewhat beyond
> the scope of network design as such and should be a standard adopted by the
> server team provided the network design supports such initiatives.
>
> Rik
>
> -----Original Message-----
> From: James Ventre [mailto:messageboard@ventrefamily.com]
> Sent: Tuesday, July 25, 2006 1:32 PM
> To: Guyler, Rik
> Cc: 'ccielab@groupstudy.com'
> Subject: Re: What's your View about these
>
> I'd consider your 3750 "stack" a single point of failure, if you're
> using the stacking feature. I recently came across a scenario where
> the stacking software between the 3750's wasn't functioning and no traffic
> passed - in or out.
>
> James
>
>
>
> Guyler, Rik wrote:
>> Our server farm connects into the network at the distribution layer,
>> where we typically have better equipment and higher bandwidth
>> backplanes. In our case, we use 4500 switches with Sup4s, which has
>> been an excellent combination supporting over 300+ servers, mainframes,
> minis, AS400s, etc.
>> The 3750 series switches should also be a pretty good solution in this
>> situation but the backplane will be much less than a more robust
>> chassis switch. Be conservative on the number of switches in a single
>> stack since I seem to recall the backplane in a stack runs at 32Gb.
>>
>> I would not directly connect anything directly into the core except
>> for distribution and other core switches. Sometimes the demarcation
>> point is not clearly defined so if your core and distribution layers
>> are collapsed into a single device or layer then really, from an
>> architectural perspective the 3750 stacks would be considered access
>> layer but the reality is that they are still only a single hop away
>> form the core so don't get too wrapped up into the terminology.
>>
>> Rik
>
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