RE: (PM) Average bandwidth per dial-up port...
Doug Hardie (bc979@lafn.org)
Fri, 30 Apr 1999 22:46:45 -0700
At 22:20 -0700 4/30/99, Kevin Sawyer wrote:
>> At 18:29 -0700 4/30/99, Kevin Sawyer wrote:
>> >What is a good figure for the average amount of Internet (not local
>> >POP3/SMTP/HTTP) bandwidth needed per dial-up port?
>>
>> Here is one data point:
>>
>> We have 8 T1s for dial-in and one T1 to the internet. We only support
>> Email, http, https, ftp, and news. The T1 tends to run at
>> about 75% busy
>> under heavy load. It all depends on what the users do with their
>> connections. Most of ours surf the web.
>
>So you have between 184 and 192 dial-up ports, right? Do you fill them?
>When they're full, you still only use 75% of your T-1?
>
>I'm currently putting 230 ports (10 PRIs) against a T-1 (no other traffic)
>and according to MRTG it that T-1 peaks out at about 170K/s inbound and
>20K/s outbound when all 230 ports are full. 192K/s is the theoretical
>maximum for a T-1, so I think I'm probably over-booking it a bit. I've done
>several dial-up tests while all 230 ports are in use and I've always been
>able to download 4K/s+, so I'm not too worried about it just yet...
>
>However, I've always wondered if anyone had a reliable rule-of-thumb...
>
>--Kevin
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Those numbers are short term averages. We have never filled all 8 T1s.
However, we have come quite close. I don't have exact numbers, and not all
days use that much. Those are about the highest we have seen.
-- Doug
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