HP VPN Firewall Appliances System Management and Maintenance Command Reference

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ip ttl-expires enable
Use ip ttl-expires enable to enable sending ICMP timeout packets.
Use undo ip ttl-expires to disable sending ICMP timeout packets.
Syntax
ip ttl-expires enable
undo ip ttl-expires
Default
Sending ICMP timeout packets is disabled.
Views
System view
Default command level
2: System level
Usage guidelines
If the feature is disabled, the device does not send TTL timeout ICMP packets, but still sends "reassembly
timeout" ICMP packets.
Examples
# Enable sending ICMP timeout packets.
<Sysname> system-view
[Sysname] ip ttl-expires enable
ip unreachables enable
Use ip unreachables enable to enable sending ICMP destination unreachable packets.
Use undo ip unreachables to disable sending ICMP destination unreachable packets.
Syntax
ip unreachables enable
undo ip unreachables
Default
Sending ICMP destination unreachable packets is disabled.
Views
System view
Default command level
2: System level
Examples
# Enable sending ICMP destination unreachable packets.
<Sysname> system-view
[Sysname] ip unreachables enable