Configuring BGP4

 

 

Table 10.6: BGP4 Neighbor Information (Continued)

 

 

 

 

 

 

This Field...

 

Displays...

 

 

 

 

 

 

TCP Connection state

 

The state of the connection with the neighbor. The connection can

 

 

 

have one of the following states:

 

 

 

• LISTEN – Waiting for a connection request.

 

 

 

• SYN-SENT – Waiting for a matching connection request after

 

 

 

having sent a connection request.

 

 

 

• SYN-RECEIVED – Waiting for a confirming connection request

 

 

 

acknowledgment after having both received and sent a

 

 

 

connection request.

 

 

 

• ESTABLISHED – Data can be sent and received over the

 

 

 

connection. This is the normal operational state of the

 

 

 

connection.

 

 

 

• FIN-WAIT-1 – Waiting for a connection termination request from

 

 

 

the remote TCP, or an acknowledgment of the connection

 

 

 

termination request previously sent.

 

 

 

• FIN-WAIT-2 – Waiting for a connection termination request from

 

 

 

the remote TCP.

 

 

 

• CLOSE-WAIT – Waiting for a connection termination request

 

 

 

from the local user.

 

 

 

• CLOSING – Waiting for a connection termination request

 

 

 

acknowledgment from the remote TCP.

 

 

 

• LAST-ACK – Waiting for an acknowledgment of the connection

 

 

 

termination request previously sent to the remote TCP (which

 

 

 

includes an acknowledgment of its connection termination

 

 

 

request).

 

 

 

• TIME-WAIT – Waiting for enough time to pass to be sure the

 

 

 

remote TCP received the acknowledgment of its connection

 

 

 

termination request.

 

 

 

• CLOSED – There is no connection state.

 

 

 

 

 

 

Local host

 

The IP address of the routing switch.

 

 

 

 

 

 

Local port

 

The TCP port the routing switch is using for the BGP4 TCP session

 

 

 

with the neighbor.

 

 

 

 

 

 

Remote host

 

The IP address of the neighbor.

 

 

 

 

 

 

Remote port

 

The TCP port the neighbor is using for the BGP4 TCP session with

 

 

 

the routing switch.

 

 

 

 

 

 

ISentSeq

 

The initial send sequence number for the session.

 

 

 

 

 

 

SendNext

 

The next sequence number to be sent.

 

 

 

 

 

 

TotUnAck

 

The number of sequence numbers sent by the routing switch that

 

 

 

have not been acknowledged by the neighbor.

 

 

 

 

 

 

TotSent

 

The number of sequence numbers sent to the neighbor.

 

 

 

 

 

 

ReTrans

 

The number of sequence numbers that the routing switch

 

 

 

retransmitted because they were not acknowledged.

 

 

 

 

 

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