User's Manual

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User Manual CForce N100
egress is limited to 20480Kbps. That means the receiving rate of the wireless link
is limited within 10Mbps, the sending rate is limited to less than 20Mbps. But
usually, the input limited effect is not obviously, that’s because we could not
control how quickly the traffic arrives. However, when a port sends out egress
traffic, it can control how quickly the traffic exits.
Burst defines the how many bytes allowed for downloading/uploading during
a quick time. That leads to momentary throughput can greater than the limit value.
Figure 7-3 Traffic Shaping
 Ingress traffic entering ath0, control the input rate
 Egress traffic exiting ath0, control the output rate
The relationship of rate and burst for ingress:
 Set burst to 0, the rate of ingress is unlimited
 Set burst to about 1/10 of rate limit, the rate curve is stable
 Set burst larger than rate limit, the rate curve will hold a high value for a while
then down to stable
Below is the table that reflects the relationship between ingress rate limit and
burst.
Ingress
Throughput when reach stable
Rate Limit(kbps)
Burst(Kbytes)
(Mbps)
Description
10000
0
29.587
Unlimited
10000
10
4.286
Stable
10000
100
8.037
Oblique up to stable
10000
1000
8.825
From 9.5 down to stable
10000
10000
8.6
From 28.5 down to stable
10000
40000
8.6
Hold on 10 seconds at 29.6, then
suddenly down to stable