socktype sock-type: Displays the socket information of this type. The sock type is in the range of 1 to 3, corresponding to TCP, UDP, and raw IP respectively.

task-id: Displays the socket information of this task. Task ID is in the range of 1 to 200.

socket-id: Displays the information of the socket. Socket ID is in the range of 0 to 3072.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Examples

# Display the TCP socket information.

<Sysname> display ip socket

SOCK_STREAM:

Task = VTYD(38), socketid = 1, Proto = 6,

LA = 0.0.0.0:23, FA = 0.0.0.0:0,

sndbuf = 8192, rcvbuf = 8192, sb_cc = 0, rb_cc = 0,

sb_maxcc = 0, rb_maxcc = 0,

socket option = SO_ACCEPTCONN SO_KEEPALIVE SO_REUSEPORT SO_SENDVPNID(3073) SO_SETKEEPALIVE,

socket state = SS_PRIV SS_ASYNC

Task = HTTP(36), socketid = 1, Proto = 6,

LA = 0.0.0.0:80, FA = 0.0.0.0:0,

sndbuf = 8192, rcvbuf = 8192, sb_cc = 0, rb_cc = 0,

sb_maxcc = 0, rb_maxcc = 0,

socket option = SO_ACCEPTCONN SO_REUSEPORT,

socket state = SS_PRIV SS_NBIO

Task = ROUT(69), socketid = 10, Proto = 6,

LA = 0.0.0.0:179, FA = 192.168.1.45:0,

sndbuf = 8192, rcvbuf = 8192, sb_cc = 0, rb_cc = 0,

sb_maxcc = 0, rb_maxcc = 0,

socket option = SO_ACCEPTCONN SO_REUSEADDR SO_REUSEPORT SO_SENDVPNID(0),

socket state = SS_PRIV SS_ASYNC

Task = VTYD(38), socketid = 4, Proto = 6,

LA = 192.168.1.40:23, FA = 192.168.1.52:1917,

sndbuf = 8192, rcvbuf = 8192, sb_cc = 237, rb_cc = 0,

sb_maxcc = 0, rb_maxcc = 0,

socket option = SO_KEEPALIVE SO_OOBINLINE SO_REUSEPORT SO_SENDVPNID(0) SO_SETKEEPALIVE,

socket state = SS_ISCONNECTED SS_PRIV SS_ASYNC

Task = VTYD(38), socketid = 3, Proto = 6,

LA = 192.168.1.40:23, FA = 192.168.1.84:1503,

sndbuf = 8192, rcvbuf = 8192, sb_cc = 0, rb_cc = 0,

sb_maxcc = 0, rb_maxcc = 0,

socket option = SO_KEEPALIVE SO_OOBINLINE SO_REUSEPORT SO_SENDVPNID(0) SO_SETKEEPALIVE,

socket state = SS_ISCONNECTED SS_PRIV SS_ASYNC

Task = ROUT(69), socketid = 11, Proto = 6,

LA = 192.168.1.40:1025, FA = 192.168.1.45:179,

sndbuf = 8192, rcvbuf = 8192, sb_cc = 0, rb_cc = 0,

sb_maxcc = 0, rb_maxcc = 0,

socket option = SO_REUSEADDR SO_LINGER SO_SENDVPNID(0),

socket state = SS_ISCONNECTED SS_PRIV SS_ASYNC

SOCK_DGRAM:

Task = NTPT(37), socketid = 1, Proto = 17,

LA = 0.0.0.0:123, FA = 0.0.0.0:0,

sndbuf = 9216, rcvbuf = 41600, sb_cc = 0, rb_cc = 0,

sb_maxcc = 0, rb_maxcc = 0,

socket option = SO_UDPCHECKSUM SO_SENDVPNID(3073),

socket state = SS_PRIV

Task = AGNT(51), socketid = 1, Proto = 17,

LA = 0.0.0.0:161, FA = 0.0.0.0:0,

sndbuf = 9216, rcvbuf = 41600, sb_cc = 0, rb_cc = 0,

sb_maxcc = 0, rb_maxcc = 0,

socket option = SO_UDPCHECKSUM SO_SENDVPNID(3073),

socket state = SS_PRIV SS_NBIO SS_ASYNC

Task = RDSO(56), socketid = 1, Proto = 17,

LA = 0.0.0.0:1024, FA = 0.0.0.0:0,

sndbuf = 9216, rcvbuf = 41600, sb_cc = 0, rb_cc = 0,

sb_maxcc = 0, rb_maxcc = 0,

socket option = SO_UDPCHECKSUM,

socket state = SS_PRIV

Task = TRAP(52), socketid = 1, Proto = 17,

LA = 0.0.0.0:1025, FA = 0.0.0.0:0,

sndbuf = 9216, rcvbuf = 0, sb_cc = 0, rb_cc = 0,

sb_maxcc = 0, rb_maxcc = 0,

socket option = SO_UDPCHECKSUM,

socket state = SS_PRIV

Task = RDSO(56), socketid = 2, Proto = 17,

LA = 0.0.0.0:1812, FA = 0.0.0.0:0,

sndbuf = 9216, rcvbuf = 41600, sb_cc = 0, rb_cc = 0,

sb_maxcc = 0, rb_maxcc = 0,

socket option = SO_UDPCHECKSUM,

socket state = SS_PRIV

SOCK_RAW:

Task = ROUT(69), socketid = 8, Proto = 89,

LA = 0.0.0.0, FA = 0.0.0.0,

sndbuf = 262144, rcvbuf = 262144, sb_cc = 0, rb_cc = 0,

sb_maxcc = 0, rb_maxcc = 0,

socket option = SO_SENDVPNID(0) SO_RCVVPNID(0),

socket state = SS_PRIV SS_ASYNC

Task = ROUT(69), socketid = 3, Proto = 2,

LA = 0.0.0.0, FA = 0.0.0.0,

sndbuf = 32767, rcvbuf = 256000, sb_cc = 0, rb_cc = 0,

sb_maxcc = 0, rb_maxcc = 0,

socket option = SO_SENDVPNID(0) SO_RCVVPNID(0),

socket state = SS_PRIV SS_NBIO SS_ASYNC

Task = ROUT(69), socketid = 2, Proto = 103,

LA = 0.0.0.0, FA = 0.0.0.0,

sndbuf = 65536, rcvbuf = 256000, sb_cc = 0, rb_cc = 0,

sb_maxcc = 0, rb_maxcc = 0,

socket option = SO_SENDVPNID(0) SO_RCVVPNID(0),

socket state = SS_PRIV SS_NBIO SS_ASYNC

Task = ROUT(69), socketid = 1, Proto = 65,

LA = 0.0.0.0, FA = 0.0.0.0,

sndbuf = 32767, rcvbuf = 256000, sb_cc = 0, rb_cc = 0,

sb_maxcc = 0, rb_maxcc = 0,

socket option = 0,

socket state = SS_PRIV SS_NBIO SS_ASYNC

Task = RSVP(73), socketid = 1, Proto = 46,

LA = 0.0.0.0, FA = 0.0.0.0,

sndbuf = 4194304, rcvbuf = 4194304, sb_cc = 0, rb_cc = 0,

sb_maxcc = 0, rb_maxcc = 0,

socket option = 0,

socket state = SS_PRIV SS_NBIO SS_ASYNC

Table 1 Command output

Field	Description
SOCK_STREAM	TCP socket.
SOCK_DGRAM	UDP socket.
SOCK_RAW	Raw IP socket.
Task	Task number.
socketid	Socket ID.
Proto	Protocol number of the socket, indicating the protocol type that IP carries.
LA	Local address and local port number.
FA	Remote address and remote port number.
sndbuf	Sending buffer size (in bytes) of the socket.
rcvbuf	Receiving buffer size (in bytes) of the socket.
sb_cc	Current data size in the sending buffer (available only for TCP that can buffer data).
rb_cc	Current data size in the receiving buffer.
sb_maxcc	History maximum data size in the sending buffer.
rb_maxcc	History maximum data size in the receiving buffer.
socket option	Socket option.
socket state	Socket state.

display ip statistics

Use display ip statistics to display statistics of IP packets.

Syntax

display ip statistics [ | { begin | exclude | include } regular-expression ]

Views

Any view

Default command level

1: Monitor level

Parameters

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Examples

# Display statistics of IP packets.

<Sysname> display ip statistics

Input: sum 7120 local 112

bad protocol 0 bad format 0

bad checksum 0 bad options 0

Output: forwarding 0 local 27

dropped 0 no route 2

compress fails 0

Fragment:input 0 output 0

dropped 0

fragmented 0 couldn't fragment 0

Reassembling:sum 0 timeouts 0

Table 2 Command output

Field		Description
Input	sum	Total number of packets received.
	local	Total number of packets with destination being local.
	bad protocol	Total number of unknown protocol packets.
	bad format	Total number of packets with incorrect format.
	bad checksum	Total number of packets with incorrect checksum.
	bad options	Total number of packets with incorrect option.
Output	forwarding	Total number of packets forwarded.
	local	Total number of packets sent from the local.
	dropped	Total number of packets discarded.
	no route	Total number of packets for which no route is available.
	compress fails	Total number of packets failed to be compressed.
Fragment	input	Total number of fragments received.
	output	Total number of fragments sent.
	dropped	Total number of fragments dropped.
	fragmented	Total number of packets successfully fragmented.
	couldn't fragment	Total number of packets that failed to be fragmented.
Reassembling	sum	Total number of packets reassembled.
Reassembling	timeouts	Total number of reassembly timeout fragments.

Related commands

· display ip interface

· reset ip statistics

display tcp statistics

Use display tcp statistics to display statistics of TCP traffic.

Syntax

display tcp statistics [ | { begin | exclude | include } regular-expression ]

Views

Any view

Default command level

1: Monitor level

Parameters

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Examples

# Display statistics of TCP traffic.

<Sysname> display tcp statistics

Received packets:

Total: 8457

packets in sequence: 3660 (5272 bytes)

window probe packets: 0, window update packets: 0

checksum error: 0, offset error: 0, short error: 0

duplicate packets: 1 (8 bytes), partially duplicate packets: 0 (0 bytes)

out-of-order packets: 17 (0 bytes)

packets of data after window: 0 (0 bytes)

packets received after close: 0

ACK packets: 4625 (141989 bytes)

duplicate ACK packets: 1702, too much ACK packets: 0

Sent packets:

Total: 6726

urgent packets: 0

control packets: 21 (including 0 RST)

window probe packets: 0, window update packets: 0

data packets: 6484 (141984 bytes) data packets retransmitted: 0 (0 bytes)

ACK-only packets: 221 (177 delayed)

Retransmitted timeout: 0, connections dropped in retransmitted timeout: 0

Keepalive timeout: 1682, keepalive probe: 1682, Keepalive timeout, so connections disconnected : 0

Initiated connections: 0, accepted connections: 22, established connections: 22

Closed connections: 49 (dropped: 0, initiated dropped: 0)

Packets dropped with MD5 authentication: 0

Packets permitted with MD5 authentication: 0

Table 3 Command output

Field		Description
Received packets	Total	Total number of packets received.
	packets in sequence	Number of packets arriving in sequence.
	window probe packets	Number of window probe packets received.
	window update packets	Number of window update packets received.
	checksum error	Number of checksum error packets received.
	offset error	Number of offset error packets received.
	short error	Number of received packets with length being too small.
	duplicate packets	Number of completely duplicate packets received.
	partially duplicate packets	Number of partially duplicate packets received.
	out-of-order packets	Number of out-of-order packets received.
	packets of data after window	Number of packets outside the receiving window.
	packets received after close	Number of packets that arrived after connection is closed.
	ACK packets	Number of ACK packets received.
	duplicate ACK packets	Number of duplicate ACK packets received.
	too much ACK packets	Number of ACK packets for data unsent.
Sent packets	Total	Total number of packets sent.
	urgent packets	Number of urgent packets sent.
	control packets	Number of control packets sent.
	window probe packets	Number of window probe packets sent. In the brackets are resent packets.
	window update packets	Number of window update packets sent.
	data packets	Number of data packets sent.
	data packets retransmitted	Number of data packets retransmitted.
	ACK-only packets	Number of ACK packets sent. In brackets are delayed ACK packets.
Retransmitted timeout		Number of retransmission timer timeouts.
connections dropped in retransmitted timeout		Number of connections broken due to retransmission timeouts.
Keepalive timeout		Number of keepalive timer timeouts.
keepalive probe		Number of keepalive probe packets sent.
Keepalive timeout, so connections disconnected		Number of connections broken due to timeout of the keepalive timer.
Initiated connections		Number of connections initiated.
accepted connections		Number of connections accepted.
established connections		Number of connections established.
Closed connections		Number of connections closed. In brackets are connections closed accidentally (before receiving SYN from the peer) and connections closed initiatively (after receiving SYN from the peer).
Packets dropped with MD5 authentication		Number of packets dropped by MD5 authentication.
Packets permitted with MD5 authentication		Number of packets permitted by MD5 authentication.

Related commands

· display tcp status

· reset tcp statistics

Field	Description
Received packets	Total	Total number of UDP packets received.
checksum error	Total number of packets with incorrect checksum.
shorter than header	Number of packets with data shorter than head.
data length larger than packet	Number of packets with data longer than packet.
unicast(no socket on port)	Number of unicast packets with no socket on port.
broadcast/multicast(no socket on port)	Number of broadcast/multicast packets without socket on port.
not delivered, input socket full	Number of packets not delivered to an upper layer due to a full socket cache.
input packets missing pcb cache	Number of packets without matching protocol control block cache.
Sent packets	Total	Total number of UDP packets sent.

reset ip statistics

Use reset ip statistics to clear statistics of IP packets.

Syntax

reset ip statistics

Views

User view

Default command level

1: Monitor level

Examples

# Clear statistics of IP packets.

<Sysname> reset ip statistics

Related commands

· display ip statistics

· display ip interface

reset tcp statistics

Use reset tcp statistics to clear statistics of TCP traffic.

Syntax

reset tcp statistics

Views

User view

Default command level

1: Monitor level

Examples

# Clear statistics of TCP traffic.

<Sysname> reset tcp statistics

Related commands

display tcp statistics

reset udp statistics

Use reset udp statistics to clear statistics of UDP traffic.

Syntax

reset udp statistics

Views

User view

Default command level

1: Monitor level

Examples

# Clear statistics of UDP traffic.

<Sysname> reset udp statistics

tcp mss

Use tcp mss to configure the TCP MSS.

Use undo tcp mss to restore the default.

Syntax

tcp mss value

undo tcp mss

Default

The TCP MSS is 1460 bytes.

Views

Interface view

Default command level

2: System level

Parameters

value: TCP maximum segment size (MSS) in bytes, ranging from 128 to 2048.

Usage guidelines

TCP MSS = path MTU – IP header length – TCP header length

Examples

# Set the TCP MSS to 300 bytes on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] tcp mss 300

tcp path-mtu-discovery

Use tcp path-mtu-discovery to enable TCP path MTU discovery.

Use undo tcp path-mtu-discovery to disable TCP path MTU discovery, and disable all running path MTU timers. New TCP connections do not perform TCP path MTU discovery, but existing TCP connections can still use TCP path MTU discovery.

Syntax

tcp path-mtu-discovery [ aging minutes | no-aging ]

undo tcp path-mtu-discovery

Default

TCP path MTU discovery is disabled.

Views

System view

Default command level

2: System level

Parameters

aging minutes: Sets the aging time of the path MTU, in the range of 10 to 30 minutes. The default aging time is 10 minutes.

no-aging: Does not age out the path MTU.

Examples

# Enable TCP path MTU discovery and set the path MTU aging time to 20 minutes.

<Sysname> system-view

[Sysname] tcp path-mtu-discovery aging 20

tcp timer fin-timeout

Use tcp timer fin-timeout to configure the TCP finwait timer.

Use undo tcp timer fin-timeout to restore the default.

Syntax

tcp timer fin-timeout time-value

undo tcp timer fin-timeout

Default

The TCP finwait timer is 675 seconds.

Views

System view

Default command level

2: System level

Parameters

time-value: Specifies the TCP finwait timer in seconds, in the range of 76 to 3,600.

Usage guidelines

The actual finwait timer is determined by the following formula:

Actual finwait timer = (Configured finwait timer – 75) + configured synwait timer

Examples

# Set the TCP finwait timer to 800 seconds.

<Sysname> system-view

[Sysname] tcp timer fin-timeout 800

Related commands

· tcp timer syn-timeout

· tcp window

tcp timer syn-timeout

Use tcp timer syn-timeout to configure the TCP synwait timer.

Use undo tcp timer syn-timeout to restore the default.

Syntax

tcp timer syn-timeout time-value

undo tcp timer syn-timeout

Default

The TCP synwait timer is 75 seconds.

Views

System view

Default command level

2: System level

Parameters

time-value: Specifies the TCP synwait timer in seconds, in the range of 2 to 600.

Examples

# Set the TCP synwait timer to 80 seconds.

<Sysname> system-view

[Sysname] tcp timer syn-timeout 80

Related commands

· tcp timer fin-timeout

· tcp window

tcp window

Use tcp window to configure the size of the TCP send/receive buffer.

Use undo tcp window to restore the default.

Syntax

tcp window window-size

undo tcp window

Default

The size of the TCP send/receive buffer is 8 KB.

Views

System view

Default command level

2: System level

Parameters

window-size: Size of the send/receive buffer in KB, in the range of 1 to 32.

Examples

# Configure the size of the TCP send/receive buffer as 3 KB.

<Sysname> system-view

[Sysname] tcp window 3

Related commands

· tcp timer fin-timeout

· tcp timer syn-timeout

04-Layer 3 Command Reference

IP performance optimization commands

display icmp statistics

display ip socket

display ip statistics

display tcp statistics

display udp statistics

reset ip statistics

reset tcp statistics

reset udp statistics

tcp mss

tcp path-mtu-discovery

tcp timer fin-timeout

tcp timer syn-timeout

tcp window

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