Displaying IPv6 TCP information
You can display the following IPv6 TCP information:
• General information about each TCP connection on the router, including the percentage of free memory for each of the internal
TCP buers.
• Detailed information about a specied TCP connection.
To display general information about each TCP connection on the router, enter the following command at any CLI level.
device#show ipv6 tcp connections
Local IP address:port <-> Remote IP address:port TCP state
10.168.182.110:23 <-> 10.168.8.186:4933 ESTABLISHED
10.168.182.110:8218 <-> 10.168.182.106:179 ESTABLISHED
10.168.182.110:8039 <-> 10.168.2.119:179 SYN-SENT
10.168.182.110:8159 <-> 10.168.2.102:179 SYN-SENT
2000:4::110:179 <-> 2000:4::106:8222 ESTABLISHED (1440)
Total 5 TCP connections
TCP MEMORY USAGE PERCENTAGE
FREE TCP = 98 percent
FREE TCP QUEUE BUFFER = 99 percent
FREE TCP SEND BUFFER = 97 percent
FREE TCP RECEIVE BUFFER = 100 percent
FREE TCP OUT OF SEQUENCE BUFFER = 100 percent
Syntax: show ipv6 tcp connections
This display shows the following information.
TABLE 39 General IPv6 TCP connection
elds
Field Description
Local IP address:port The IPv4 or IPv6 address and port number of the local router interface
over which the TCP connection occurs.
Remote IP address:port The IPv4 or IPv6 address and port number of the remote router interface
over which the TCP connection occurs.
TCP state The state of the TCP connection. Possible states include the following:
• 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 conrming 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).
Displaying global IPv6 information
FastIron Ethernet Switch Layer 3 Routing
186 53-1003627-04
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