Rate Shaping Overview; Configuration Notes - Dell PowerConnect B-FCXs Configuration Manual

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Rate shaping overview

PowerConnect#show rate-limit fixed
Total rate-limited interface count: 11.
Port
11
12
13
14
15
21
25
Syntax: show rate-limit fixed
The command lists the ports on which fixed rate limiting is configured, and provides the
information listed in
TABLE 115
This field...
Total rate-limited interface count
Port
Configured Input Rate
Actual Input Rate
Rate shaping overview
Outbound Rate Shaping is a port- level feature that is used to shape the rate and control the
bandwidth of outbound traffic on a port. This feature smooths out excess and bursty traffic to the
configured maximum limit before it is sent out on a port. Packets are stored in available buffers
and then forwarded at a rate no greater than the configured limit. This process provides for better
control over the inbound traffic of neighboring devices.
The device has one global rate shaper for a port and one rate shaper for each port priority queue.
Rate shaping is done on a single-token basis, where each token is defined to be 1 byte.

Configuration notes

The following rules apply when configuring outbound rate shapers:
•
•
•
646
Configured Input Rate
1 1000000
3 10000000
7 10000000
9 7500000
8000000
8000000
8000000
8000000
8000000
8000000
7500000
Table 115
CLI display of Fixed rate limiting information
Outbound rate shapers can be configured only on physical ports, not on virtual or loopback
ports.
For trunk ports, the rate shaper must be configured on individual ports of a trunk using the
config-trunk-ind command (trunk configuration level); you cannot configure a rate shaper for a
trunk.
This feature is supported on PowerConnect B-Series FCX devices only.
Actual Input Rate
for each of the ports.
Displays...
The total number of ports that are configured for Fixed rate limiting.
The port number.
The maximum rate requested for inbound traffic. The rate is measured
in bits per second (bps).
The actual maximum rate provided by the hardware. The rate is
measured in bps.
1000000
10005000
10000000
7502000
7999000
7999000
7999000
7999000
7999000
8000000
7502000
PowerConnect B-Series FCX Configuration Guide
53-1002266-01