1036 CHAPTER 61: S YSTEM M AINTENANCE COMMANDS-h ttl: Configures the TTL value for echo requests to be sent. The TTL value rangesfrom 1 to 255. The default value is 255.-i: Specifies an interface to send packets.interface-type: Specifies the interface type.interface-number: Specifies the interface number.-n: Configures to take the host parameter as IP address without domain nameresolution.-p: pattern is the hexadecimal padding of ICMP echo-request, for example -p ffpads the packet completely with ff. By default, the starting padding is 0x01,crescent, and the ending padding is 0x09, and then repeat.-q: Configures not to display any other detailed information except statistics.-r: Record route. By default, the system does not record route.-s packetsize: Specifies the length of ECHO-REQUEST (excluding IP and ICMPpacket header) in bytes. The length of the echo-request packet defaults to 56bytes.-t timeout: Maximum waiting time after sending the echo-request (measured inms). The time defaults to 2000 ms.-tos tos: Specifies TOS value for echo requests to be sent, range from 0 to 255.The default value is 0.-v: Displays other received ICMP packets (non echo-response). By default, no othernon echo-response ICMP packets is displayed.-vpn-instance vpn-instance-nam: VPN instance name.host: Destination host domain name or IP address of the destination host.ip: Chooses IP ICMP packet.DescriptionUse the ping command to check the IP network connection and the reachabilityof the host.The ping command sends ICMP ECHO-REQUEST message to the destination. Ifthe network to the destination works well, then the destination host will sendICMP ECHO-REPLY to the source host after receiving ICMP ECHO-REQUEST.Perform ping command to troubleshoot the network connection and line quality.The output information includes:■ Responses to each of the ECHO-REQUEST messages. If the response message isnot received until timeout, output "Request time out". Or display responsemessage bytes, packet sequence number, TTL and response time.
