R3166-R3206-HP High-End Firewalls System Management and Maintenance Configuration Guide-6PW101

System maintenance and debugging

NOTE:

The firewall supports system maintenance and debugging configuration only in the command line

interface (CLI).

System maintenance and debugging

You can use the ping command and the tracert command to verify the current network connectivity, and

use the debug command to enable debugging and thus to diagnose system faults based on the

debugging information.

Ping

Introduction

You can use the ping command to verify whether a device with a specified address is reachable, and to

examine network connectivity.

The ping function is implemented through the Internet Control Message Protocol (ICMP):

1. The source device sends an ICMP echo request to the destination device.

2. The source device determines whether the destination is reachable based on whether it receives an

ICMP echo reply; if the destination is reachable, the source device determines the link quality

based on the numbers of ICMP echo requests sent and replies received, determines the distance

between the source and destination based on the round trip time of ping packets.

Configuring ping

Follow the step below to configure the ping function:

To do… Use the command…

Remarks

Check whether a specified

address in an IP network is

reachable

ping [ ip ] [ -a source-ip | -c count | -f | -h ttl | -i

interface-type interface-number | -m interval | -n | -p

pad | -q | -r | -s packet-size | -t timeout | -tos tos | -v

| -vpn-instance vpn-instance-name ] * host

Required

Available in any view

NOTE:

• For a low-speed network, HP recommends that you set a larger value for the timeout timer (indicated b

the -t parameter in the command) when configuring the ping command.

• Only the directly connected se

ment address can be pin

ed if the out

oin

interface is specified with

the -i argument