Firewall Wizards mailing list archives
RE: Network Traffic Violations
From: "Paul D. Robertson" <proberts () clark net>
Date: Sun, 13 Sep 1998 12:56:44 -0400 (EDT)
On Fri, 11 Sep 1998, Woody Weaver wrote:
At 09:06 AM 9/12/98 -0700, Matthew Gast wrote:Is anybody familiar enough with cable modems to know how large an area you're sharing bandwidth over? If it's only a block or an apartment complex or something relatively small, the impact of oversubscription could be smaller than with DSL.One of my colleagues is getting a cable modem turned on tonight. He was told he had 1100 other users in his domain!
In a domain isn't the same as on the same pipe, I've got tens of thousands of users in my domain, they're not all on a single network segment. Most cable systems that use hybrid fiber-coax (two way plant - not everyone is there yet) tend to have aggragation scaling issues at the head end. I don't recall the exact numbers and my notes are at work, but in non-specific terms (heavy apartment complexes may be a different issue) I seem to recall it being on the order of 120-150 households. Definitely, it's possible for the cable guys to scale it well, and it just remains to be seen if they will. Also, most newer systems allow the throttling of bandwidth at the user end - I'm not sure how this will play out as modems get into the consumer channel, but for the current rental units I'd guess it's a great way of limiting bandwidth problems in the short-term if an issue crops up. Given the lead time for connections, oversubscription at a head end should be fairly easy to see coming, but then again, I'd have _thought_ the same for T-3s at a local switch from two different wireline carriers until fairly recently *sigh*. Paul ----------------------------------------------------------------------------- Paul D. Robertson "My statements in this message are personal opinions proberts () clark net which may have no basis whatsoever in fact." PSB#9280
Current thread:
- Re: Network Traffic Violations, (continued)
- Re: Network Traffic Violations Bill_Royds (Sep 10)
- RE: Network Traffic Violations jrtietsort (Sep 10)
- RE: Network Traffic Violations Ted Doty (Sep 11)
- RE: Network Traffic Violations Rick Smith (Sep 11)
- RE: Network Traffic Violations Ted Doty (Sep 13)
- RE: Network Traffic Violations Rick Smith (Sep 13)
- RE: Network Traffic Violations David Lang (Sep 14)
- RE: Network Traffic Violations Dominique Brezinski (Sep 15)
- RE: Network Traffic Violations Rick Smith (Sep 11)
- RE: Network Traffic Violations Matthew Gast (Sep 11)
- RE: Network Traffic Violations Woody Weaver (Sep 13)
- RE: Network Traffic Violations Paul D. Robertson (Sep 14)
- RE: Network Traffic Violations Woody Weaver (Sep 13)