Allied Telesis management software layer 2+ fast ethernet switches manual

Chapter 11: Networking Stack Commands

Out Segs with RST

The number of segments transmitted with the RST bit set.

Total Number of TCP Listening sockets

The number of active listening sockets. There can be a maximum of three listening sockets. One is for the Telnet server, another for SSH, and the last for the web browser server. If a server is disabled, its listening socket does not appear in the table.

Total Number of TCP connections

The number of active Telnet, SSH, and web browser connections to the switch.

Index

The internal socket ID number assigned to the connection.

Local Address

The IP address of the switch, followed by the TCP port number used by the switch for the connection. The two values are divided by a colon, as illustrated in Figure 1. The port number indicates the type of TCP connection. A port number of 23 indicates a Telnet connection, 22 an SSH connection, and 80 or 443 a web browser HTTP or HTTPS connection, respectively.

TCP Port

IP Address Number

169.254.37.1:23

Figure 1 IP Address and TCP Port Number

Foreign Address

The IP address of the management workstation that initiated the connection, followed by the station’s TCP port number.

State

The state of the TCP connection. A state of ESTABLISHED signals a successful TCP connection between the switch and the management workstation. For definitions of all the TCP states, refer to RFC-793.

The entries for the listening sockets for the Telnet, SSH, and web browser servers are identified in the table with a TCP state of LISTEN. If you disable a server on the switch, its corresponding LISTEN entry is removed from the table. Disabling all the servers leaves the table empty. (The SSH server is disabled by default on the switch.)

202