show system statistics tcp
Syntax
show system statistics tcp
Syntax (EX Series Switches)
show system statistics tcp <all-members> <local> <member member-id>
Syntax (TX Matrix Router)
show system statistics tcp <all-chassis | all-lcc | lcc number | scc>
Syntax (TX Matrix Plus Router)
show system statistics tcp <all-chassis | all-lcc | lcc number | sfc number>
Description
Display system-wide Transmission Control Protocol (TCP) statistics.
Options
| none | Display system statistics for TCP. |
| all-chassis | (Optional) Display system statistics for TCP for all the routers in the chassis. |
| all-lcc | (Optional) On a TX Matrix router, display system statistics for TCP for all T640 routers connected to the TX Matrix router. On a TX Matrix Plus router, display system statistics for TCP for all connected T1600 or T4000 LCCs. |
| all-members | (Optional) Display TCP statistics for all members of the Virtual Chassis configuration. |
| lcc number | (Optional) On a TX Matrix router, display system statistics for TCP for a specific T640 router that is connected to the TX Matrix router. On a TX Matrix Plus router, display system statistics for TCP for a specific router that is connected to the TX Matrix Plus router. Replace number with the following values depending on the LCC configuration:
|
| local | (Optional) Display TCP statistics for the local Virtual Chassis member. |
| member member-id | (Optional) Display TCP statistics for the specified member of the Virtual Chassis configuration. Replace member-id with a value from 0 through 9. |
| scc | (Optional) Display system statistics for TCP for the TX Matrix router (or switch-card chassis). |
| sfc number | (Optional) Display system statistics for TCP for the TX Matrix Plus router. Replace number with 0. |
Additional Information
By default, when you issue the show system statistics tcp command on the primary Routing Engine of a TX Matrix router or a
TX Matrix Plus router, the command is broadcast to all the primary
Routing Engines of the LCCs connected to it in the routing matrix.
Likewise, if you issue the same command on the backup Routing Engine
of a TX Matrix or a TX Matrix Plus router, the command is broadcast
to all backup Routing Engines of the LCCs that are connected to it
in the routing matrix.
Required Privilege Level
view
Sample Output
- show system statistics tcp
- show system statistics tcp (EX Series Switches)
- show system statistics tcp lcc (TX Matrix Router)
- show system statistics tcp (TX Matrix Plus Router)
- show system statistics tcp (Junos OS Evolved)
show system statistics tcp
user@host> show system statistics tcp
tcp:
3844 packets sent
3618 data packets (1055596 bytes)
0 data packets (0 bytes) retransmitted
0 resends initiated by MTU discovery
205 ack-only packets (148 packets delayed)
0 URG only packets
0 window probe packets
0 window update packets
1079 control packets
5815 packets received
3377 acks (for 1055657 bytes)
24 duplicate acks
0 acks for unsent data
2655 packets (15004 bytes) received in-sequence
1 completely duplicate packet (0 bytes)
0 old duplicate packets
0 packets with some dup. data (0 bytes duped)
0 out-of-order packets (0 bytes)
0 packets (0 bytes) of data after window
0 window probes
7 window update packets
0 packets received after close
0 discarded for bad checksums
0 discarded for bad header offset fields
0 discarded because packet too short
1 connection request
32 connection accepts
0 bad connection attempts
0 listen queue overflows
33 connections established (including accepts)
30 connections closed (including 0 drops)
27 connections updated cached RTT on close
27 connections updated cached RTT variance on close
0 connections updated cached ssthresh on close
0 embryonic connections dropped
3374 segments updated rtt (of 3220 attempts)
0 retransmit timeouts
0 connections dropped by rexmit timeout
0 persist timeouts
0 connections dropped by persist timeout
344 keepalive timeouts
0 keepalive probes sent
0 connections dropped by keepalive
1096 correct ACK header predictions
1314 correct data packet header predictions
32 syncache entries added
0 retransmitted
0 dupsyn
0 dropped
32 completed
0 bucket overflow
0 cache overflow
0 reset
0 stale
0 aborted
0 badack
0 unreach
0 zone failures
0 cookies sent
0 cookies received
0 ACKs sent in response to in-window but not exact RSTs
0 ACKs sent in response to in-window SYNs on established connections
0 rcv packets dropped by TCP due to bad address
0 out-of-sequence segment drops due to insufficient memory
1058 RST packets
0 ICMP packets ignored by TCP
0 send packets dropped by TCP due to auth errors
0 rcv packets dropped by TCP due to auth errors
show system statistics tcp (EX Series Switches)
user@host> show system statistics tcp
Tcp:
572724 packets sent
21936 data packets (1887657 bytes)
2 data packets retransmitted (20 bytes)
0 resends initiated by MTU discovery
3724 ack only packets (537 packets delayed)
0 URG only packets
1 window probe packets
1 window update packets
1094083 control packets
1134258 packets received
21371 acks(for 1886660 bytes)
5870 duplicate acks
0 acks for unsent data
19908 packets received in-sequence(267794 bytes)
3022 completely duplicate packets(0 bytes)
0 old duplicate packets
4 packets with some duplicate data(4 bytes duped)
2 out-of-order packets(2 bytes)
0 packets of data after window(0 bytes)
0 window probes
40 window update packets
0 packets received after close
0 discarded for bad checksums
0 discarded for bad header offset fields
0 discarded because packet too short
547027 connection requests
80 connection accepts
0 bad connection attempts
0 listen queue overflows
103 connections established (including accepts)
547106 connections closed (including 6 drops)
47 connections updated cached RTT on close
47 connections updated cached RTT variance on close
0 connections updated cached ssthresh on close
547004 embryonic connections dropped
20862 segments updated rtt(of 567830 attempts)
2 retransmit timeouts
0 connections dropped by retransmit timeout
0 persist timeouts
0 connections dropped by persist timeout
3032 keepalive timeouts
3031 keepalive probes sent
1 connections dropped by keepalive
7823 correct ACK header predictions
12533 correct data packet header predictions
80 syncache entries added
0 retransmitted
0 dupsyn
4 dropped
80 completed
0 bucket overflow
0 cache overflow
0 reset
0 stale
0 aborted
0 badack
0 unreach
0 zone failures
0 cookies sent
0 cookies received
1 SACK recovery episodes
1 segment retransmits in SACK recovery episodes
1 byte retransmits in SACK recovery episodes
71 SACK options (SACK blocks) received
1 SACK options (SACK blocks) sent
0 SACK scoreboard overflow
0 ACKs sent in response to in-window but not exact RSTs
0 ACKs sent in response to in-window SYNs on established connections
0 rcv packets dropped by TCP due to bad address
0 out-of-sequence segment drops due to insufficient memory
547024 RST packets
0 ICMP packets ignored by TCP
0 send packets dropped by TCP due to auth errors
0 rcv packets dropped by TCP due to auth errors
0 outgoing segments dropped due to policing
show system statistics tcp lcc (TX Matrix Router)
user@host> show system statistics tcp lcc 2
lcc2-re0:
--------------------------------------------------------------------------
tcp:
21271 packets sent
11069 data packets (12044 bytes)
0 data packets (0 bytes) retransmitted
0 resends initiated by MTU discovery
10198 ack-only packets (10194 packets delayed)
0 URG only packets
0 window probe packets
0 window update packets
4 control packets
13363 packets received
11073 acks (for 12044 bytes)
0 duplicate acks
0 acks for unsent data
12895 packets (2400874 bytes) received in-sequence
0 completely duplicate packets (0 bytes)
0 old duplicate packets
0 packets with some dup. data (0 bytes duped)
0 out-of-order packets (0 bytes)
0 packets (0 bytes) of data after window
0 window probes
0 window update packets
0 packets received after close
0 discarded for bad checksums
0 discarded for bad header offset fields
0 discarded because packet too short
4 connection requests
0 connection accepts
0 bad connection attempts
0 listen queue overflows
4 connections established (including accepts)
33 connections closed (including 0 drops)
0 connections updated cached RTT on close
0 connections updated cached RTT variance on close
0 connections updated cached ssthresh on close
0 embryonic connections dropped
11073 segments updated rtt (of 11073 attempts)
0 retransmit timeouts
0 connections dropped by rexmit timeout
0 persist timeouts
0 connections dropped by persist timeout
0 keepalive timeouts
0 keepalive probes sent
0 connections dropped by keepalive
464 correct ACK header predictions
2172 correct data packet header predictions
0 ACKs sent in response to in-window but not exact RSTs
0 ACKs sent in response to in-window SYNs on established connections
0 out-of-sequence segment drops due to insufficient memory
0 RST packets
0 ICMP packets ignored by TCP
show system statistics tcp (TX Matrix Plus Router)
user@host> show system statistics tcp
sfc0-re0:
--------------------------------------------------------------------------
Tcp:
10420 packets sent
10203 data packets (2374613 bytes)
0 data packets retransmitted (0 bytes)
0 resends initiated by MTU discovery
202 ack only packets (120 packets delayed)
0 URG only packets
0 window probe packets
0 window update packets
30 control packets
16635 packets received
9468 acks(for 2374674 bytes)
32 duplicate acks
0 acks for unsent data
7764 packets received in-sequence(38286 bytes)
20 completely duplicate packets(0 bytes)
0 old duplicate packets
0 packets with some duplicate data(0 bytes duped)
0 out-of-order packets(0 bytes)
0 packets of data after window(0 bytes)
0 window probes
356 window update packets
0 packets received after close
0 discarded for bad checksums
0 discarded for bad header offset fields
0 discarded because packet too short
10 connection requests
33 connection accepts
0 bad connection attempts
0 listen queue overflows
34 connections established (including accepts)
50 connections closed (including 0 drops)
24 connections updated cached RTT on close
24 connections updated cached RTT variance on close
0 connections updated cached ssthresh on close
9 embryonic connections dropped
9468 segments updated rtt(of 9256 attempts)
0 retransmit timeouts
0 connections dropped by retransmit timeout
0 persist timeouts
0 connections dropped by persist timeout
14 keepalive timeouts
14 keepalive probes sent
0 connections dropped by keepalive
6220 correct ACK header predictions
6625 correct data packet header predictions
33 syncache entries added
0 retransmitted
0 dupsyn
0 dropped
33 completed
0 bucket overflow
0 cache overflow
0 reset
0 stale
0 aborted
0 badack
0 unreach
0 zone failures
0 cookies sent
0 cookies received
0 SACK recovery episodes
0 segment retransmits in SACK recovery episodes
0 byte retransmits in SACK recovery episodes
0 SACK options (SACK blocks) received
0 SACK options (SACK blocks) sent
0 SACK scoreboard overflow
0 ACKs sent in response to in-window but not exact RSTs
0 ACKs sent in response to in-window SYNs on established connections
0 rcv packets dropped by TCP due to bad address
0 out-of-sequence segment drops due to insufficient memory
15 RST packets
0 ICMP packets ignored by TCP
0 send packets dropped by TCP due to auth errors
0 rcv packets dropped by TCP due to auth errors
0 outgoing segments dropped due to policing
lcc0-re0:
--------------------------------------------------------------------------
Tcp:
1306 packets sent
1251 data packets (161855 bytes)
0 data packets retransmitted (0 bytes)
0 resends initiated by MTU discovery
51 ack only packets (1 packets delayed)
0 URG only packets
0 window probe packets
0 window update packets
6 control packets
1397 packets received
1218 acks(for 161904 bytes)
2 duplicate acks
0 acks for unsent data
612 packets received in-sequence(12495 bytes)
0 completely duplicate packets(0 bytes)
0 old duplicate packets
0 packets with some duplicate data(0 bytes duped)
0 out-of-order packets(0 bytes)
0 packets of data after window(0 bytes)
0 window probes
22 window update packets
0 packets received after close
0 discarded for bad checksums
0 discarded for bad header offset fields
0 discarded because packet too short
1 connection requests
24 connection accepts
0 bad connection attempts
0 listen queue overflows
25 connections established (including accepts)
27 connections closed (including 0 drops)
24 connections updated cached RTT on close
24 connections updated cached RTT variance on close
0 connections updated cached ssthresh on close
0 embryonic connections dropped
1218 segments updated rtt(of 1192 attempts)
0 retransmit timeouts
0 connections dropped by retransmit timeout
0 persist timeouts
0 connections dropped by persist timeout
0 keepalive timeouts
0 keepalive probes sent
0 connections dropped by keepalive
196 correct ACK header predictions
119 correct data packet header predictions
24 syncache entries added
0 retransmitted
0 dupsyn
0 dropped
24 completed
0 bucket overflow
0 cache overflow
0 reset
0 stale
0 aborted
0 badack
0 unreach
0 zone failures
0 cookies sent
0 cookies received
0 SACK recovery episodes
0 segment retransmits in SACK recovery episodes
0 byte retransmits in SACK recovery episodes
0 SACK options (SACK blocks) received
0 SACK options (SACK blocks) sent
0 SACK scoreboard overflow
0 ACKs sent in response to in-window but not exact RSTs
0 ACKs sent in response to in-window SYNs on established connections
0 rcv packets dropped by TCP due to bad address
0 out-of-sequence segment drops due to insufficient memory
2 RST packets
0 ICMP packets ignored by TCP
0 send packets dropped by TCP due to auth errors
0 rcv packets dropped by TCP due to auth errors
0 outgoing segments dropped due to policing
lcc1-re0:
--------------------------------------------------------------------------
Tcp:
1118 packets sent
1066 data packets (131896 bytes)
0 data packets retransmitted (0 bytes)
0 resends initiated by MTU discovery
48 ack only packets (2 packets delayed)
0 URG only packets
0 window probe packets
0 window update packets
6 control packets
1215 packets receivedshow system statistics tcp (Junos OS Evolved)
user@host> show system statistics tcp
Tcp:
2635574 packets sent
0 window probe packets
1124324 packets received
0 discarded for bad checksums
0 discarded for bad header offset fields
3495 connection requests
2371 bad connection attempts
0 listen queue overflows
1574 connections established (including accepts)
1 embryonic connections dropped
22 connections dropped by retransmit timeout
3677 keepalive probes sent
8 retransmitted
17 reset
0 aborted
0 cookies sent
0 cookies received
199 SACK recovery episodes
13743 segment retransmits in SACK recovery episodes
0 out-of-sequence segment drops due to insufficient memory
2365 RST packets
Release Information
Command introduced before Junos OS Release 7.4.
sfc option introduced in Junos OS Release
9.6.