11 Jul
1997
11 Jul
'97
5:15 a.m.
I've used 20% as the general ATM overhead now for almost two years, and have been poo-pooed by lots of people claiming that it wasn't anywhere near that bad.
Our inhouse figure is 23%. That was an empirical test of a traffic generator comparing performance to Cicso HDLC. This might be slightly pessimistic as Cisco traffic shaping (yes, even though you can't see it, it is there working) is really very aggressive and with bursty traffic it tends to prefer underfilling the line to overfilling it. Alex Bligh Xara Networks