Cisco ASR 1000 Series Configuration Manual page 42

Verifying TCP Performance Parameters
AckHold
SendWnd
KeepAlive
GiveUp
PmtuAger
DeadWait
iss:
irs:
SRTT: 0 ms, RTTO: 2000 ms, RTV: 2000 ms, KRTT: 0 ms
minRTT: 60000 ms, maxRTT: 0 ms, ACK hold: 200 ms
Flags: passive open, higher precedence, retransmission timeout
TCB is waiting for TCP Process (67)
Datagrams (max data segment is 516 bytes):
Rcvd: 6 (out of order: 0), with data: 0, total data bytes: 0
Sent: 0 (retransmit: 0, fastretransmit: 0), with data: 0, total data
bytes: 0
Cisco Software Modularity
The following sample output from the show tcp tcb command displays a Software Modularity image:
Example:
Device# show tcp tcb 0x1059C10
Connection state is ESTAB, I/O status: 0, unread input bytes: 0
Local host: 10.4.2.32, Local port: 23
Foreign host: 10.4.2.39, Foreign port: 11000
VRF table id is: 0
Current send queue size: 0 (max 65536)
Current receive queue size: 0 (max 32768)
Event Timers (current time is 0xB9ACB9):
Timer
Retrans
SendWnd
TimeWait
AckHold
KeepAlive
PmtuAger
GiveUp
Throttle
irs: 1633857851
iss: 4231531315
sndmax: 4231531392
SRTT: 84 ms,
minRTT: 0 ms,
Keepalive time: 7200 sec, SYN wait time: 75 sec
Giveup time: 0 ms, Retransmission retries: 0, Retransmit forever: FALSE
State flags: none
Feature flags: Nagle
Request flags: none
Window scales: rcv 0, snd 0, request rcv 0, request snd 0
Timestamp option: recent 0, recent age 0, last ACK sent
Datagrams (in bytes): MSS 1460, peer MSS 1460, min MSS 1460, max MSS 1460
Rcvd: 14 (out of order: 0), with data: 10, total data bytes: 38
Sent: 10 (retransmit: 0, fastretransmit: 0), with data: 5, total data bytes: 76
Header prediction hit rate: 72 %
Socket states: SS_ISCONNECTED, SS_PRIV
Read buffer flags: SB_WAIT, SB_SEL, SB_DEL_WAKEUP
Read notifications: 4
Write buffer flags: SB_DEL_WAKEUP
Write notifications: 0
Socket status: 0
Step 2 show tcp brief [all | numeric]
(Optional) Displays addresses in IP format.
Use the show tcp brief command to display a concise description of TCP connection endpoints. Use the optional all
keyword to display the status for all endpoints with addresses in a Domain Name System (DNS) hostname format. If
IP Application Services Configuration Guide, Cisco IOS XE Release 3S (Cisco ASR 1000)
34
0 0
0 0
0 0
0 0
0 0
0 0
0 snduna: 0 sndnxt:
0 rcvnxt: 0 rcvwnd:
Starts Wakeups
6 0
0 0
0 0
8 4
11 0
0 0
0 0
0 0
rcvnxt: 1633857890
snduna: 4231531392
sndcwnd: 10220
RTTO: 650 ms, RTV: 69 ms,
maxRTT: 200 ms, ACK hold: 200 ms
0x0
0x0
0x0
0x0
0x0
0x0
0 sndwnd:
4128 delrcvwnd:
mis-ordered: 0 bytes
Next(msec)
0
0
0
0
7199992
0
0
0
rcvadv: 1633890620 rcvwnd:
sndnxt: 4231531392 sndwnd:
KRTT: 0 ms
Configuring TCP
0
0
32730
4052
0