Re: GigaRouter Latency?
Deepak Jain <deepak@jain.com> wrote:
Latency in a router is only somewhat important for most network applications but on some applications it has a very serious effect. If anyone would like to flame me, please do it in private email and I am sure I will find the time to get back to you :).
I'd like to point out that 1 ns of latency equivalent to 1 ft of wire (more-less), so 1 ms of latency is 190 miles of wire. It is not a serious delay, when compared with typical thousand-mile backbone links. (1 ms is a _lot_ of time to route a packet). --vadim
(1 ms is a _lot_ of time to route a packet).
Indeed. A full 10Mb/s Ethernet with minimum sized back to back packets has ~14200 packets per second. If every one of them is IP, that gives you 70us (.07ms) to handle the average one. Fortunately, most packets are not minimum sized. Unfortunately, most links are must faster than 10Mb/s. 1ms had best appear to be a great deal of time in any router on a modern network.
participants (2)
-
Paul A Vixie
-
Vadim Antonov