Switching Introduction
©2008 Allied Telesis Inc. All rights reserved.
Software Version 5.2.1
AlliedWare Plus
TM
Operating System Software Reference C613-50003-00 REV E
14.13
Storm Control
The packet storm protection feature enables you to set limits on the reception rate of
broadcast, multicast frames and destination lookup failures. You can set separate limits beyond
which each of the different packet types are discarded.
Note:
A destination lookup failure (DLF) is the event of receiving a unicast Ethernet frame
with an unknown destination address.
Note:
On the AT-9900 applying this command to one port will apply it to all ports on the
switch.
For more information on applying storm control, see the
storm-control level command on
page 15.25
command.
To apply storm control by limiting broadcasts to 30% on port 1.0.4 (and all other port on
the switch)
To turn off storm protection on port 1. 0. 4(and all other ports on the switch)
Support for Jumbo Frames
You can enable jumbo frame support on the switch to improve throughput and network
utilization. By increasing frame size, more data is put in each packet that the switch has to
process.
When jumbo frames support is enabled, the maximum received packet size is:
■
9710 bytes for ports that work at speeds of either 10 Mbps or 100 Mbs
■
10240 bytes for ports that work at speeds of 1000 Mbps
Jumbo frame support is enabled or disabled on the entire switch, not on a per port basis. To
enable them, use the
platform jumboframe command on page 15.13
; to see whether they are
enabled, use the
show platform command on page 15.20
. Jumbo frame support is disabled by
default.
awplus#
configure terminal
Enter the config terminal mode
awplus(config)#
interface port1.0.4
Enter the config interface mode for the
selected port
awplus(config-if)#
storm-control
broadcast level 30
Configure the interface
awplus#
configure terminal
Enter the config terminal mode
awplus(config)#
interface port1.0.4
Enter the config interface mode for the
selected port
awplus(config-if)#
no storm-control
broadcast level
Configure the interface
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