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| General_Maximus 2001-04-27, 12:27 pm |
| Which is it? I keep seeing different opinions. EE 5.5 say 70/30, but others say 80/20 (some ccda books I've seen). thx
(more questions to come later) | |
| Terje 2001-04-27, 12:43 pm |
| quote:
Originally posted by General_Maximus
Which is it? I keep seeing different opinions. EE 5.5 say 70/30, but others say 80/20 (some ccda books I've seen). thx
BCMSN (the ciscopress book) uses 80/20. Don't read to much into the numbers. The main point is to illustrate that the trend is towards lots of traffic needing to go off the LAN. This results in the need for efficient multilayer switching and suitable network planning.
quote:
(more questions to come later)
Looking forward to them.
Terje | |
| dmaftei 2001-04-27, 12:44 pm |
| A search for "70/30" at www.cisco.com will give you nothing (well, almost). While a search for "80/20" returns eight pages of links, many of which are about a "80/20 rule". The exams are created by Cisco. What would you bet on?! | |
| Bernie 2001-04-27, 1:29 pm |
| Sybex CCNA study guide, pg73 first paragraph under Limitations of Layer2 Switching.
"The right way to create bridge networks is to make sure that users spend 80% of their time on the local segment"
I saw two other references in the same book but can't remember where they are.
HTH | |
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| quote:
Originally posted by Bernie
"The right way to create bridge networks is to make sure that users spend 80% of their time on the local segment"
That's the traditional advice. Nowadays Internet etc. has forced much of the traffic to be non-local. This requires somewhat new design approaches and equipment.
Terje | |
| Tech Staff 2001-04-27, 1:49 pm |
| Cisco consistently promotes the 80/20 rule as a LAN design best practice. http://www.cisco.com/warp/public/77...ood_design.html
There is also a 20/80 rule where 80% of traffic is expected to traverse the backbone. This is the case with web server colocation sites, where only network monitoring and management traffic will be local; actual client requests will be remote. The 20/80 rule is beyond the scope of the CCNA exam.
Regards,
John
Tech Staff
Techmindworks LLC |
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