what's mean of show tcp 's giveup and retrans?

[iwanthome]

When I show tcp on my 7500,I found the value of retrans,ackhold and giveup is so bigger.
what's mean of this? Does it means something is wrong?
7500>show tcp
Stand-alone TCP connection from host 10.48.251.2
Connection state is ESTAB, I/O status: 1, unread input bytes: 0
Local host: 10.0.23.1, Local port: 2065
Foreign host: 10.48.251.2, Foreign port: 11023

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

TCP driver queue size 0, flow controlled FALSE

Event Timers (current time is 0x4F5FED18):
Timer Starts Wakeups Next
Retrans 3779836 45 0x0
TimeWait 0 0 0x0
AckHold 1272930 1 0x0
SendWnd 0 0 0x0
KeepAlive 8 0 0x0
GiveUp 3779790 0 0x0
PmtuAger 0 0 0x0
DeadWait 0 0 0x0

iss: 2393627442 snduna: 3300519493 sndnxt: 3300519493 sndwnd: 20428
irs: 3302910483 rcvnxt: 3575996359 rcvwnd: 20157 delrcvwnd: 323

SRTT: 300 ms, RTTO: 303 ms, RTV: 3 ms, KRTT: 0 ms
minRTT: 28 ms, maxRTT: 1616 ms, ACK hold: 200 ms
Flags: passive open, higher precedence, retransmission timeout

Datagrams (max data segment is 536 bytes):
Rcvd: 5053844 (out of order: 7), with data: 1273026, total data bytes: 273107447
Sent: 5053230 (retransmit: 45, fastretransmit: 8), with data: 3780160, total dat
a bytes: 906963827

 

[tschouten]

I would say the possiblity of you being an inocent party DRDoS is what may be happening. You may want to look into it a little bit further.

http://www.dsinet.org/textfiles/tcp-ip/Distributed Reflection Denial of Service.pdf

 

[iwanthome]

thanks!I will look it more detail.
And I forget something that 10.48.251.2 is dlsw remote peer to 7500.