3Com 3031 Command Reference Manual page 135

The information that this command can display includes: the local address of TCP
connection, local port number, external address, external port number, and
connection state.
For the related command, see telnet.
Example
<3Com> display tcp status
TCPCB Local Address
129.102.100.142
028ca414 0.0.0.0.23
The above shown information indicates: one TCP connection has been set up. the
local IP address of the TCP connection is 129.102.100.142 with the local port
number as 23, and the remote IP address is 129.102.001.92, and there is also a
local server process monitoring the No. 23 port.
telnet Syntax
telnet [ vpn-instance vpn-instance-name ] host-ip-address [ service-port ]
View
User view
Parameter
vpn-instance vpn-instance-name: Sets the vpn-instance name of MPLS VPN.
host-ip-address: Hostname or IP address of the remote router, in dotted decimal
format.
service-port: TCP port number for the remote router to provide Telnet service, in
the range of 0 to 65535.
Description
Using the telnet command, you can log on another device from the current router.
By default, if the service-port is not specified, the Telnet port number is 23.
By executing the telnet command, the user can conveniently log on another device
from a router to achieve remote management.
For the related command, see display tcp status.
Example
Log on another router 3Com2 (the IP address is 129.102.0.1) from the current
router 3Com1.
<3Com>telnet 129.102.0.1
Trying 129.102.0.1...
Service port is 23
Foreign Address
23 129.102.001.092
0.0.0.0.0
Terminal Service Commands
State
ESTABLISHED
LISTEN
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