show ipv6 tcp traffic

Displays IPv6 Transmission Control Protocol (TCP) traffic statistics.
Syntax
show ipv6 tcp traffic
Modes

User EXEC mode

The show ipv6 tcp traffic command displays the following information:

Output field Description

active opens

The number of TCP connections opened by this device by sending a TCP SYN to another device.

passive opens

The number of TCP connections opened by this device in response to connection requests (TCP SYNs) received from other devices.

failed attempts

This information is used by RUCKUS customer support.

active resets

The number of TCP connections this device reset by sending a TCP RESET message to the device at the other end of the connection.

passive resets

The number of TCP connections this device reset because the device at the other end of the connection sent a TCP RESET message.

input errors

This information is used by RUCKUS customer support.

in segments

The number of TCP segments received by the device.

out segments

The number of TCP segments sent by the device.

retransmission

The number of segments that this device retransmitted because the retransmission timer for the segment had expired before the device at the other end of the connection had acknowledged receipt of the segment.

in connections requests

The number of connection requests received by the device.

out connections requests

The number of connection requests sent by the device.

connections established

The total number of TCP connection established.

acks

The total number acknowledgments received.

duplicate acks

The total number of duplicate acknowledgments received.

duplicate bytes

The total number of TCP packets received with duplicate sequence number.

bad checksum

The total number of TCP packets received with bad checksum.

no checksum

The total number of TCP packets received with no checksum.

invalid header length

The total number of TCP packet received where the header length is less than the minimum header length.

illegal TCP MSS option length

The total number of TCP packets received with an illegal TCP MSS option length.

illegal option

The total number of TCP packets received with an illegal kind for TCP option.

minimum TCP header

The total number of TCP packets received with the length of the packet less than the minimum TCP header length requirement.

invalid segment

TCP invalid segments received.

TCP-AO Validation failed Segments Number of TCP segments that failed authentication
TCP-AO mismatch connections overall Number of TCP connections where authentication send-ID and receive-ID did not match.
Examples

The following is sample output from the show ipv6 tcp traffic command. 

device# show ipv6 tcp traffic
TCP Statistics
  4 current active tcbs, 10 tcbs allocated, 4 tcbs freed 0 tcbs protected
  4 active opens, 4 passive opens, 3 failed attempts
  1 active resets, 0 passive resets, 0 input errors
  372236 in segments, 372233 out segments, 17 retransmission
  4 in connections requests, 6 out connections requests, 4 connections established,
  372226 acks, 0  duplicate acks, 9 duplicate bytes
  0 bad checksum, 5 no checksum, 0 invalid header length
  0 illegal TCP MSS option length, 0 illegal option, 0 minimum TCP header, 0 invalid segment
  4 TCP-AO Validation failed Segments, 0 TCP-AO mismatch connections overall
History
Release version Command history
08.0.95 The command output was enhanced to show more detailed information.
09.0.10 The command output was enhanced to show TCP keychain authentication options (AO).
Parent topic: Show Commands