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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
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Chapter 36 Troubleshooting
Using Ping
Using Ping
These sections contain this information:
• Understanding Ping, page 36-10
• Using Ping, page 36-10
Understanding Ping
The Cisco ME switch supports IP ping, which you can use to test connectivity to remote hosts. Ping
sends an echo request packet to an address and waits for a reply.
The Cisco ME switch also provides the Control Plane Security feature, which by default drops ping
response packets received on user network interfaces (UNIs). However, methods are available to ping
successfully from the switch to a host connected to a UNI.
Control Plane Security does not drop ping response packets to or from network node interfaces (NNIs),
and no special configuration is required to enable pings to or from hosts connected to NNIs.
Using Ping
Beginning in privileged EXEC mode, use the ping command to ping another device on the network from
the switch:
Note Ping is not supported on a UNI configured as an IEEE 802.1Q tunnel port.
Ping is supported on NNIs on all software images.
It is important to note that three software images are available for the Cisco ME 3400 switch, which
provide different options for pinging a host connected to a UNI:
• Metro IP access image that supports IP routing
• Metro access image
• Metro base image
The next sections apply to both access ports and trunk ports.
Command Purpose
ping [host | address] Ping a remote host by supplying the hostname or IP network
address.
Note Though other protocol keywords are available with the
ping command, they are not supported in this release.