configure ports rate-limit flood

configure ports [port_list | port_group]rate-limit flood [broadcast | multicast | unknown-destmac] [no-limit | pps {out-actions [{log} {trap} {disable-port}]}]]


Limits the amount of ingress flooded traffic; minimizes network impact of broadcast loops.

Syntax Description

port_list Specifies the port number. On a stand-alone switch, this value is just the port number, and on a SummitStack, this value is the slot and port number.
port_group Port group name.
broadcast Specifies all broadcast packets.
multicast Specifies all flooded multicast packets (known IP multicast caches are still forwarded at line rate).
unknown-destmac Specifies all packets with unknown MAC DAs.
no-limit Specifies unlimited rate.
pps Packets per second allowed; range is from 0 to 262,144.
out-actions Out-of-profile action.
log Generate log event if traffic exceeds configured rate.
trap Generate SNMP (Simple Network Management Protocol) trap if traffic exceeds configured rate.
disable-port Disable the underlying port when traffic exceeds configured rate.


No limit.

Usage Guidelines

Use this command to limit the amount of ingress flooding traffic and to minimize the network impact of broadcast loops.



When the multicast keyword is used, both known and unknown multicast traffic will be rate limited.

To display results, use the show ports rate-limit flood command.


The following example rate limits broadcast packets on port 3 on a stand-alone switch to 500 pps:

configure ports 3 rate-limit flood broadcast 500


This command was available in ExtremeXOS 11.1.

The out-actions, log, trap, disable-port, and port_group options were added in ExtremeXOS 16.1.

Platform Availability

This command is available on the Summit X450-G2, X460-G2, X670-G2, X770, and ExtremeSwitching X440-G2, X620, X690, X870 series switches.