Line Rate; Configuration Task List - HP A6600 Configuration Manual

Line rate

The line rate of a physical interface specifies the maximum rate for forwarding packets (including critical
packets).
Line rate also uses token buckets for traffic control. With line rate configured on an interface, all packets to
be sent through the interface are first handled by the token bucket at line rate. 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.
Figure 11 Line rate implementation
Packets to be sent via
this interface
The token bucket mechanism limits traffic rate when accommodating bursts. It allows bursty traffic to be
transmitted as long as enough tokens are available. If tokens are inadequate, packets cannot be transmitted
until efficient tokens are generated in the token bucket. It restricts the traffic rate to the rate for generating
tokens.
Line rate limits the total rate of all packets on a physical interface. It is easier to use than traffic policing in
controlling the total traffic rate on a physical interface.

Configuration task list

Task
Configuring traffic policing
Configuring GTS
Configuring the line rate
Put tokens into the token
bucket at the set rate
Queuing
Buffer queue
Remarks
Configuring traffic policing in policy approach
Configuring traffic policing in
non-policy approach
Configuring GTS in policy approach
Configuring GTS in
non-policy approach
Configuring the line rate
36
Packets sent
Token
bucket
Configuring CAR list-based traffic policing
Configuring traffic policing for all traffic
Configuring ACL-based GTS
Configuring GTS for all traffic