Specifications

Configuring the 12E/2FE Interfaces 6-15

Using the ping Command

Note For the Cisco 7206 router shelf, the show pas eswitch addresses fastethernet command

requires a shelf number in the format show pas eswitch addresses type shelf number/port adapter

slot/interface.

To determine if a 12E/2FE interface is conﬁgured for cut-through packet switching

(store-and-forward is the default for all 12E/2FE interfaces), enter the show running-conﬁg

command. If a 12E/2FE interface is conﬁgured for store-and-forward packet switching, output from

the show running-conﬁg command does not display switching information.

In the following example, the ﬁrst 12E/2FE interface port (interface port 0) in port adapter slot 3 is

conﬁgured for cut-through packet switching:

Router# show running-config

(display text omitted)

interface FastEthernet3/0

no ip address

cut-through

bridge-group 1

(display text omitted)

For complete command descriptions and examples for the Cisco 7200 series routers and the

Cisco uBR7246, refer to the documentation resources listed in the “For More Information” section

on page v.

Using the ping Command

The packet internet groper (ping) command allows you to verify that an interface port is functioning

properly and to check the path between a speciﬁc port and connected devices at various locations on

the network. This section provides brief descriptions of the ping command. After you verify that the

system has booted successfully and is operational, you can use this command to verify the status of

interface ports. Refer to the documentation resources listed in the “For More Information” section

on page v, for detailed command descriptions and examples.

The ping command sends echo request packets out to a remote device at an IP address that you

specify. After sending an echo request, the command waits a speciﬁed time for the remote device to

reply. Each echo reply is displayed as an exclamation point (!) on the console terminal; each request

that is not returned before the speciﬁed timeout is displayed as a period (.). A series of exclamation

points (!!!!!) indicates a good connection; a series of periods (.....) or the messages [timed out] or

[failed] indicate that the connection failed.

Following is an example of a successful ping command to a remote server with the address 1.1.1.10:

Router# ping 1.1.1.10

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echoes to 1.1.1.10, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/15/64 ms

Router#

If the connection fails, verify that you have the correct IP address for the destination and that the

device is active (powered on), and repeat the ping command.