On Friday 29 December 2006 10:00, Badru Ntege wrote: > Bernard > > Thanks allot for that input. It is very rare for an appreciative > email these days on the list but atleast we ISP's can go out of > the year and into the new year with these comments for that > little contribution. Most ISP's for the last three years have > not bandwidth managed local IXP content and have no imediate > plans of doing so. The problem is there is not enough local > content so unfortunately 80 90 % of all access goes to the > internet.
I think, as is normally the case, bandwidth management should occur on the customer link (i.e., the link between the CPE and the service provider's terminating edge equipment). Most of the time, if this is a leased line, that takes care of itself (although keeping an eye on the telephone company's operation of said line can become administratively cumbersome as the network grows). For cases where edge bandwidth management might be more difficult (fibre, wireless, e.t.c.), rate limting/QoS at the edge or border (routers, switches or hardware/software bandwidth managers) is an option, although an expensive one. This will differ with each ISP's bandwidth management and resource planning model. In .zw, Ethernet over fibre is rife and cheap - everyone is doing it everywhere. There is absolutely no reason for most ISP's at the ZINX to manage bandwidth on their exchange point links - these links run at 100Mbps, or at least 10Mbps where distance is a problem. However, in other countries where access to the exchange point is limited to leased lines or wireless infrastructure, where initial and/or recurring cost might be troublesome to maintain, in the long run, some ISP's would have to consider bandwidth management of local traffic. Cheers, Mark.
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