Displaying the Internet Counters

 

 

Field

Description

 

 

IP Fragments Dropped:

Total number of IP fragments dropped due to either a

 

lack of memory to store the fragment or received a

 

duplicate fragment.

IP Error in Header:

Total number of IP datagrams received with errors in the

 

header. These are discarded.

Internet Connections

The following counters contain statistics on

 

connections:

Requested:

Number of outgoing Telnet connect attempts made by

 

users.

Accepted:

Number of incoming TCP connections accepted by

 

Telnet. This count includes those connections accepted

 

by Telnet then dropped due to no physical port

 

available.

Established:

Number of connections established by TCP. This count

 

includes those connections accepted by Telnet then

 

dropped due to no physical port available.

Closed:

Number of connections closed by a user or remote host.

Dropped:

Number of connections dropped, because of a reset from

 

the remote host, unsuccessful retransmission, keepalive

 

timeout, protocol error, or aborted by Telnet due to lack

 

of available physical ports.

ICMP Messages

The following counters contain statistics on ICMP

 

messages:

Transmitted:

Total number of ICMP messages transmitted by the

 

access server.

Received:

Total number of ICMP messages received by the access

 

server.

Dropped:

Total number of ICMP messages dropped by the access

 

server, because of an error in the ICMP message, such

 

as incorrect code, checksum error, or incorrect length.

Destination

Total number of ICMP Destination Unreachable

Unreachable:

messages received by the access server. Usually

 

received when a connect attempt fails because either the

 

TCP or UDP port is unknown at the remote host, or the

 

host (or the host’s network) is unreachable.

TCP/IP Network Characteristics 7-23