Rate Limit - HP FlexFabric 5700 series Configuration Manual

Figure 8 GTS
For example, in Figure 9, Switch B performs traffic policing on packets from Switch A and drops packets
exceeding the limit. To avoid packet loss, you can perform GTS on the outgoing interface of Switch A so
that packets exceeding the limit are cached in Switch A. Once resources are released, GTS takes out the
cached packets and sends them out.
Figure 9 GTS application
Device A
Device B
Physical link

Rate limit

Rate limit controls the rate of inbound and outbound traffic. The outbound traffic is taken for example.
The rate limit of a physical interface specifies the maximum rate for sending or receiving packets
(including critical packets).
Rate limit also uses token buckets for traffic control. When rate limit is configured on an interface, a token
bucket handles all packets to be sent through the interface for rate limiting. If enough tokens are in the
token bucket, packets can be forwarded. Otherwise, packets are put into QoS queues for congestion
management. In this way, the traffic passing the physical interface is controlled.
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