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Configuring, Modifying, and Monitoring the Unit
54
Utilities Commands
Ping Commands
The ping command is intended for testing the connectivity between the switch and other IP
network devices. It is not intended as a traffic generator. Thus, using the endless ping option is
not recommended.
ping
The Ping command pings the Ipaddress specified number of times or 0 for endless ping. The
ping process starts sending one datagram per second until the number of datagrams are sent. It
prints one line of output for each response that it receives. The ping command does not return
any output if there is no response. Normal response time is 1 to 10 seconds.
ping <IP address> {<number>|0}
Example
SYS_console>ping 194.90.136.20 4
SYS_console>194.90.136.20 Alive. echo reply: id 4643, seq 1, echo-data-len 0
194.90.136.20 Alive. echo reply: id 4643, seq 2, echo-data-len 0
194.90.136.20 Alive. echo reply: id 4643, seq 3, echo-data-len 0
194.90.136.20 Alive. echo reply: id 4643, seq 4, echo-data-len 0
PING process stopped - statistics :
ICMP echo requests : 4
ICMP echo responses : 4
PING process - press <CR> for prompt
SYS_console>
If a host does not respond, only statistics are printed. Failure to get an echo response from a
host may be due to:
• A bad physical connection
• A non-existent or inactive host
• Network Unreachable: no corresponding entry in the routing table
• Destination Unreachable: the default gateway failed to route the datagram
• Outdated ARP table information - flush the ARP table with the del-arp-entry command.
ping-stop
If you started a long ping, use this command, or CTRL-C to stop the active ping process.
Port mirroring
The port mirroring feature allows you to copy selected frames to a probe port for diagnostic and
troubleshooting purposes.
Port mirroring allows you to attach a network protocol analyzer to a probe port to view the types
of traffic passing through a particular switch port or ports.
This analysis can help troubleshoot network problems on a port-by-port basis.