[c-nsp] Unknown connection on 3750

[Sergey Velikanov [Intelsoft]]

Tassos Chatzithomaoglou wrote:
> "sh tcp" should show more details about these connections.
#sh tcp tcb 03AB67D8
Connection state is ESTAB, I/O status: 1, unread input bytes: 0
Local host: 127.0.0.20, Local port: 23
Foreign host: 127.0.0.3, Foreign port: 11001

Enqueued packets for retransmit: 0, input: 0  mis-ordered: 0 (0 bytes)

Event Timers (current time is 0x5D1821D1):
Timer          Starts    Wakeups            Next
Retrans           770          3             0x0
TimeWait            0          0             0x0
AckHold            95         33             0x0
SendWnd             0          0             0x0
KeepAlive           0          0             0x0
GiveUp              0          0             0x0
PmtuAger            0          0             0x0
DeadWait            0          0             0x0

iss: 2771732545  snduna: 2771825573  sndnxt: 2771825573     sndwnd:   3832
irs: 1876021966  rcvnxt: 1876022149  rcvwnd:       3946  delrcvwnd:    182

SRTT: 300 ms, RTTO: 303 ms, RTV: 3 ms, KRTT: 0 ms
minRTT: 0 ms, maxRTT: 344 ms, ACK hold: 200 ms
Flags: passive open, higher precedence, retransmission timeout

Datagrams (max data segment is 536 bytes):
Rcvd: 839 (out of order: 0), with data: 113, total data bytes: 182
Sent: 837 (retransmit: 3), with data: 803, total data bytes: 93027

> Could they be some "internal" connections used by cisco for stacking?
I also think so, but I need confirmation :)