Alcatel-Lucent 7750 SR OS Configuration Manual page 111

The no form of the command disables the generation of ICMP destination unreachables on the router
interface.
Default unreachables 100 10 — maximum of 100 unreachable messages in 10 seconds
Parameters
number — The maximum number of ICMP unreachable messages to send, expressed as a decimal
seconds — The time frame, in seconds, used to limit the number of ICMP unreachable messages that
7750 SR OS Router Configuration Guide
integer. The seconds parameter must also be specified.
Values
10 — 1000
can be issued, expressed as a decimal integer.
Values 1 — 60
IP Router Configuration
Page 111