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Configuration Commands
Page 110 7750 SR OS Router Configuration Guide
Parameters number — The maximum number of ICMP redirect messages to send, expressed as a decimal integer.
This parameter must be specified with the time parameter.
Values 10 — 1000
seconds — The time frame, in seconds, used to limit the number of ICMP redirect messages that can
be issued,expressed as a decimal integer.
Values 1 — 60
ttl-expired
Syntax ttl-expired [number seconds]
no ttl-expired
Context config>router>if>icmp
Description This command configures the rate that Internet Control Message Protocol (ICMP) Time To Live
(TTL) expired messages are issued by the IP interface.
By default, generation of ICMP TTL expired messages is enabled at a maximum rate of 100 per 10
second time interval.
The no form of the command disables the generation of TTL expired messages.
Default ttl-expired 100 10 — maximum of 100 TTL expired message in 10 seconds
Parameters number — The maximum number of ICMP TTL expired messages to send, expressed as a decimal
integer. The seconds parameter must also be specified.
Values 10 — 1000
seconds — The time frame, in seconds, used to limit the number of ICMP TTL expired messages that
can be issued, expressed as a decimal integer.
Values 1 — 60
unreachables
Syntax unreachables [number seconds]
no unreachables
Context config>router>if>icmp
Description This command enables and configures the rate for ICMP host and network destination unreachable
messages issued on the router interface.
The unreachables command enables the generation of ICMP destination unreachables on the router
interface. The rate at which ICMP unreachables is issued can be controlled with the optional number
and seconds parameters by indicating the maximum number of destination unreachable messages that
can be issued on the interface for a given time interval.
By default, generation of ICMP destination unreachables messages is enabled at a maximum rate of
100 per 10 second time interval.