Reference v4.1.0 Instruction Manual

354 Network OS Command Reference

53-1003115-01

ipv6 icmp rate-limit

Limits the rate at which ICMP messages are sent on a IPv6 network.

Synopsis ipv6 icmp rate-limit milliseconds

no ipv6 icmp rate-limit

Operand milliseconds Number of milliseconds between packets. The range is from from 1 through

4294967295.

Defaults The default value is 1000 milliseconds.

Command Modes Interface configuration mode

Description This command limits the rate at which ICMP messages are sent on a IPv6 network. To protect

against TCP SYN attacks, you can configure the Brocade device to drop TCP SYN packets when

excessive numbers are encountered. You can set threshold values for TCP SYN packets that are

targeted at the router itself or passing through an interface, and drop them when the thresholds

are exceeded.

This command supports Joint Interoperability Test Command (JITC).

Usage Guidelines The configuration is persistent across switch reload.

Once enabled, all outbound ICMP message types are rate limited.

Examples None