On Wednesday 20 August 2003 14:58, Raghuveer wrote:Thanks alot Stef, Its very clear to me now.
What is confusing me is, there is a bandwidth provided by ISP (512Kbits)What bout this :
and one ethernet capacity(100Mbits), so which one can we call as real
link bandwidth. What is NIC bandwidth....is it ethernet bandwidth or
ISP bandwidth....?
Lan------->eth1-----------eth0---------->Internet
Now at eth0 I have ethernet device bandwidth as 100Mbits and my ISP
provides 512Kbits bandwidth. so if I want to do egress traffic control
at both eth0 and eth1, what bandwidth I should consider...? My eth1
ethernet device bandwidth is 100Mbits.
for all cbq commands : bandwidth 100mbit
eth0
cbq qdisc
cbq class rate = 512kbit, bounded
cbq class 1, rate < 512kbit
cbq class ..., rate < 512kbit
cbq class x, rate < 512kbit
So all traffic from class 1 ... x togehter is bounded to 512kbit.
eth1 cbq qdisc cbq class rate = 100mbit, bounded cbq class 1, rate 512kbit bounded cbq class 10, rate < 512kbit cbq class ..., rate < 512kbit cbq class x, rate < 512kbit cbq class 2, rate 99,5Mbit cbq class 20, rate < 99,5Mbit cbq class ..., rate < 99,5Mbit cbq class x, rate < 99,5Mbit
Class 1 is for all traffic from internet -> LAN Class 2 is for all traffic from shaper -> LAN
And if you really want to be sure it's working, you should take 500kbit. So YOU are the bottleneck and in control of the link and not the modem.
If I have ADSL with different incoming and outgoing rates. For egress shaping at WAN(eth0) interface, Whether should I use outgoing rates or combined rates (incomming + outgoing). Will it make any big difference if I use combined rates in an asymmetric link like cabel modem, ADSL etc.
Regards -Raghu
Stef
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