ProCurve 2610-PWR Technical Information download pdf (Page 273)

IP Routing Features

Configuring IP Parameters for Routing Switches

Disabling Replies to Broadcast Ping Requests

By default, ProCurve devices are enabled to respond to broadcast ICMP echo

packets, which are ping requests. You can disable response to ping requests

on a global basis using the following CLI method.

To disable response to broadcast ICMP echo packets (ping requests), enter

the following command:

ProCurve(config)# no ip icmp echo broadcast-request

Syntax: [no] ip icmp echo broadcast-request

If you need to re-enable response to ping requests, enter the following

command:

ProCurve(config)# ip icmp echo broadcast-request

Disabling ICMP Destination Unreachable Messages

By default, when a ProCurve device receives an IP packet that the device

cannot deliver, the device sends an ICMP Unreachable message back to the

host that sent the packet. The following types of ICMP Unreachable messages

are generated:

■ Administration – The packet was dropped by the ProCurve device due

to a filter or ACL configured on the device.

■ Fragmentation-needed – The packet has the Don’t Fragment bit set in

the IP Flag field, but the ProCurve device cannot forward the packet

without fragmenting it.

■ Host – The destination network or sub-net of the packet is directly

connected to the ProCurve device, but the host specified in the destination

IP address of the packet is not on the network.

■ Network – The ProCurve device cannot reach the network specified in

the destination IP address of the packet.

■ Port – The destination host does not have the destination TCP or UDP

port specified in the packet. In this case, the host sends the ICMP Port

Unreachable message to the ProCurve device, which in turn sends the

message to the host that sent the packet.

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ProCurve 2610-PWR Technical Information Page 273