Dell FCX624-E Laptop User Manual


  Open as PDF
of 1494
 
646 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Rate shaping overview
21
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 for each of the ports.
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:
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.
TABLE 115 CLI display of Fixed rate limiting information
This field... Displays...
Total rate-limited interface count The total number of ports that are configured for Fixed rate limiting.
Port The port number.
Configured Input Rate The maximum rate requested for inbound traffic. The rate is measured
in bits per second (bps).
Actual Input Rate The actual maximum rate provided by the hardware. The rate is
measured in bps.
PowerConnect#show rate-limit fixed
Total rate-limited interface count: 11.
Port Configured Input Rate Actual Input Rate
1 1000000 1000000
3 10000000 10005000
7 10000000 10000000
9 7500000 7502000
11 8000000 7999000
12 8000000 7999000
13 8000000 7999000
14 8000000 7999000
15 8000000 7999000
21 8000000 8000000
25 7500000 7502000