HP MSR2000/3000/4000 Router Series Layer 3 - IP Services Command Reference

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• If a UDP packet is destined for the device but the packet's port number does not match the running
process, the device sends the source a Port Unreachable ICMP error packet.
• If the source uses Strict Source Routing to send packets, but the intermediate device finds that the
next hop specified by the source is not directly connected, the device sends the source a Source
Routing Failure ICMP error packet.
• If the MTU of the sending interface is smaller than the packet and the packet has a Don't Fragment
set, the device sends the source a Fragmentation Needed and Don't Fragment-Set ICMP error
packet.
Examples
# Enable sending ICMP destination unreachable packets.
<Sysname> system-view
[Sysname] ip unreachables enable
reset ip statistics
Use reset ip statistics to clear IP traffic statistics.
Syntax
MSR2000/MSR3000:
reset ip statistics
MSR4000:
reset ip statistics [ slot slot-number ]
Views
User view
Predefined user roles
network-admin
Parameters
slot slot-number: Clears IP traffic statistics for the specified card. The slot-number argument specifies the
slot number of the card. (MSR4000)
Usage guidelines
To collect new IP traffic statistics within a period of time, use this command to clear history IP traffic
statistics first.
Examples
# Clear IP traffic statistics.
<Sysname> reset ip statistics
Related commands
• display ip interface
• display ip statistics
ip virtual-reassembly
Use ip virtual-reassembly to enable the IP virtual fragment reassembly feature.