3750 Stack Wise Cabling

[cormon]

Hi Guys,

We are currently trying to re organise our switching topoloogy and i have a question about stackwise cabling.

We use 3750 48 ports and 24 ports depending on how many ports we need. I have included a link to what the phyiscal network will look like.

http://dl.dropbox.com/u/4426466/Drawing1.htm

Basically we will set up a cluster of 3750 in a stack ( 8 in total) using stackwise cables. However we will have three switches in cabinet 1 , 3 switches in cabinet 2 and 2 switches in cabinet 3. We hope to use 10 ft stackwise cables to link these switches.

My question is this.

Because we will not have the cables physically connected sequentially will we have a problem ?? So basically in cabinet one we will have sw1 into sw2 --- sw2 into sw3--- sw3 under the floor to switch 1 in the next cabinet

I am aware that we will lose half our our bandwidth across the stack but not a deal breaker for us just yet. Any other concerns jumping out at you guys !!!

Thanks

 

[unclerico]

you could still close the loop and have all 32Gb/s available if you can get switch 2 in cabinet 3 to reach back to switch 1 in cabinet 1

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)

 

[PeterHurst]

A note to watch is the frailty of the stacknet cables - and possibly the interfaces they connect to. We've had issues with a few switches having faulty stacker ports after a few months causing multiple stack reconfigurations an hour.

I'd be a bit worried about the cables under the floor personally and possibly prefer something less proprietary in case a stack needs changing.

 

[burtsbees]

Many issues early on with the frailty and sketchyness of the cable interfaces. Not a very good design. Hot glue fixes that though.

JUST KIDDING, UNCLE!

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[unclerico]

LOL!!! Burt, you're on a roll homie. So you prefer hot glue to duct tape??

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)

 

[burtsbees]

Haven't thought of that...

Okay, I retract my earlier post...

Duct tape fixes that.

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[cormon]

duct tape it is then guys !!!!!.

Cheers for all the input guys. It certainly is a funny design choice but is way more organised and logical that the current ssetup we have which is in a word "brutal"

Thanks,

Kevin..

 

[VinceWhirlwind]

I've put in stacks across 3 cabinets. The cables are thick and hard to make neat, but I don't see any problems.
It's a good idea to close the loop, though.

 

[kcbell]

Folks:

Is there a maximum number of switches that you can stack together. I thought maximum # is FIVE. Please confirm!

KC

 

[unclerico]

you can stack a maximum of nine

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)