1System maintenance and debuggingYou can use the ping command and the tracert command to verify network connectivity, and use thedebug command to enable debugging and thus to diagnose system faults based on the debugginginformation.PingIntroductionThe ping command allows you to verify whether a device with a specified address is reachable, and toexamine 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 anICMP echo reply. If the destination is reachable, the source device determines the following:{ The link quality, based on the numbers of ICMP echo requests sent and replies received.{ The distance between the source and destination, based on the round trip time of ping packets.Configuring pingFollow the step below to configure the ping function:To do… Use the command… RemarksIPv4 network: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 | -ttimeout | -tos tos | -v ] * hostCheck whether a specifiedaddress in an IP network isreachable IPv6 network:ping ipv6 [ -a source-ipv6 | -c count | -minterval | -s packet-size | -t timeout ] * host [ -iinterface-type interface-number ]RequiredUse one of the commandsAvailable in any viewNOTE:When configuring the ping command for a low-speed network, H3C recommends that you set alarger value for the timeout timer (indicated by the -t parameter in the command).Ping configuration exampleNetwork requirementsAs shown in Figure 1, check whether Device A and Device C can reach each other. If they can reach eachother, obtain the detailed information about routes from Device A to Device C.
