Got another discussion question before I start work this morning ( no 4 day
holiday for me :-< ) sort of a continuation of the Brad Ellis discussion
about the SE over-engineering solutions for customers.
Cisco of late is starting to talk about backplane capacity, and in
particular expandable backplane capacity in some of their switches.
So the question I have revolves around backplane capacity and
"oversubscription" of the backplane on a switch.
For example, if I have a Cat 3524 in the closet, and pop in cards to permit
me 24 ports of 100 mbs full duplex, under what circumstances might I be
concerned about "oversubscription". If I indeed had 24 devices plugged in,
theoretically I could be pumping 4.8 gigs of data simultaneously ( less a
little for interframe gaps, and other overhead kinds of things ) that puts
me a theoretical 5 times oversubscription of this guy's backplane capacity.
On the other hand, seems to me that if I were popping that much data
simultaneously from my 24 devices I would have other problems. Even that
proverbial high speed database / transaction / e-commerce server is not
going to be running full tilt in and out all the time. Let alone user
stations, no matter how much radio they listen to, or how many avi's or CBT
videos they are watching. Those stream one way, recall.
So... what kinds of things do you consider when provisioning or
recommending? How would you approach this as a design issue?
( and no I do NOT have a customer for whom I am asking ;-> )
Chuck
Please check out my new footers for a new age
1) Altruism
http://www.thehungersite.com/cgi-bin/WebObjects/HungerSite
Please help feed hungry people worldwide. A few seconds a day can make a
difference to many people
2) Shameless Hucksterism
http://www.certificationzone.com
An excellent study focal point for all levels of certification, as well as
the attainment of internetworking expertise. Use my name when you register.
You get good study material and I get extra time
___________________________________
UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html
FAQ, list archives, and subscription info: http://www.groupstudy.com
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
