User's Manual

DH-PFM880 User Manual DaHua All Right Reserved
Page 28
7.6 Static Routes
This feature can be set to static routing.
7.7 Traffic Shaping
Traffic shaping is used to control the traffic of ingress/egress based on each
network port. As shown in figure 24, the ingress of wlan0 is limited to 1024Kbps,
and the egress is limited to 2048Kbps. That means the receiving rate of the
wireless link is limited within 1Mbps, the sending rate is limited to less than 2Mbps.
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 24 Traffic Shaping
z Ingress traffic entering wlan0, control the input rate
z Egress traffic exiting wlan0, control the output rate
The relationship of rate and burst for ingress:
z Set burst to 0, the rate of ingress is unlimited
z Set burst to about 1/10 of rate limit, the rate curve is stable
z 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.