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| Title | Size | Download |
|---|---|---|
| 05-IP Performance Commands | 78.34 KB |
Table of Contents
1 IP Performance Configuration Commands
IP Performance Configuration Commands
ip forward-broadcast (interface view)
ip forward-broadcast (system view)
IP Performance Configuration Commands
display fib
Syntax
display fib [ | { begin | include | exclude } regular-expression | acl acl-number | ip-prefix ip-prefix-name | vpn-instance vpn-instance-name [ include regular-expression ] ]
View
Any view
Default Level
1: Monitor level
Parameters
vpn-instance vpn-instance-name: Displays FIB entries of the specified VPN instance. The vpn-instance-name is a string of 1 to 31 case-sensitive characters.
|: Uses a regular expression to match FIB entries. For detailed information about regular expression, refer to CLI display in Basic System Configuration in the System Volume.
begin: Displays a specific FIB entry and all the FIB entries following it. The specific FIB entry is the first entry that matches the specified regular expression.
exclude: Displays the FIB entries that do not match the specified regular expression.
include: Displays the FIB entries that match the specified regular expression.
regular-expression: A case-sensitive string of 1 to 256 characters, excluding spaces.
acl acl-number: Displays FIB entries matching a specified ACL numbered from 2000 to 2999.
ip-prefix ip-prefix-name: Displays FIB entries matching a specified IP prefix list, a string of 1 to 19 characters.
Description
Use the display fib command to display FIB entries. If no parameters are specified, all FIB entries will be displayed.
Examples
# Display all FIB entries.
FIB Table:
Total number of Routes : 4
Flag:
U:Useable G:Gateway H:Host B:Blackhole D:Dynamic S:Static
R:Reject L:Generated by ARP or ESIS
Destination/Mask Nexthop Flag TimeStamp Interface Token
10.2.0.0/16 0.0.0.0 U t[1150900568] Vlan1 invalid
10.2.1.1/32 127.0.0.1 HU t[1150900568] InLoop0 invalid
127.0.0.0/8 127.0.0.1 U t[1150623094] InLoop0 invalid
127.0.0.1/32 127.0.0.1 HU t[1150623094] InLoop0 invalid
Table 1-1 Description on the fields of the display fib command
|
Field |
Description |
|
Total number of Routes |
Total number of routes in the FIB table |
|
Destination/Mask |
Destination address/length of mask |
|
Nexthop |
Address of next hop |
|
Flag |
Flags of routes: l “U”—Usable route l “G”—Gateway route l “H”—Host route l “B”—Blackhole route l “D”—Dynamic route l “S”—Static route l “R”—Refused route l “L”—Route generated by ARP or ESIS |
|
TimeStamp |
Time stamp |
|
Interface |
Forward interface |
|
Token |
LSP index number |
# Display FIB information passing ACL 2000
<Sysname> system-view
[Sysname] acl number 2000
[Sysname-acl-basic-2000] rule permit source 10.2.0.0 0.0.255.255
[Sysname-acl-basic-2000] display fib acl 2000
Route entry matched by access-list 2000:
Summary counts: 2
Flag:
U:Useable G:Gateway H:Host B:Blackhole D:Dynamic S:Static
R:Reject L:Generated by ARP or ESIS
Destination/Mask Nexthop Flag TimeStamp Interface Token
10.2.0.0/16 0.0.0.0 U t[1150900568] Vlan1 invalid
10.2.1.1/32 127.0.0.1 HU t[1150900568] InLoop0 invalid
# Display all entries that contain the string 127 and start from the first one.
<Sysname> display fib | begin 127
Flag:
U:Useable G:Gateway H:Host B:Blackhole D:Dynamic S:Static
R:Reject L:Generated by ARP or ESIS
Destination/Mask Nexthop Flag TimeStamp Interface Token
10.2.1.1/32 127.0.0.1 HU t[1150900568] InLoop0 invalid
127.0.0.0/8 127.0.0.1 U t[1150623094] InLoop0 invalid
127.0.0.1/32 127.0.0.1 HU t[1150623094] InLoop0 invalid
# Display FIB information passing the IP prefix list abc0
<Sysname> system-view
[Sysname] ip ip-prefix abc0 permit 10.2.0.0 16
[Sysname] display fib ip-prefix abc0
Route Entry matched by prefix-list abc0:
Summary count: 1
Flag:
U:Useable G:Gateway H:Host B:Blackhole D:Dynamic S:Static
R:Reject L:Generated by ARP or ESIS
Destination/Mask Nexthop Flag TimeStamp Interface Token
10.2.0.0/16 0.0.0.0 U t[1150900568] Vlan1 invalid
display fib ip-address
Syntax
display fib ip-address1 [ { mask1 | mask-length1 } [ ip-address2 { mask2 | mask-length2 } | longer ] | longer ]
View
Any view
Default Level
1: Monitor level
Parameters
ip-address1, ip-address2: Destination IP address, in dotted decimal notation. ip-address1 and ip-address2 together determine an address range for the FIB entries to be displayed.
mask1, mask2: IP address mask.
mask-length1, mask-length2: Length of IP address mask.
longer: Displays FIB entries that match the specified address/mask and have masks longer than or equal to the mask that a user enters. If no masks are specified, FIB entries that match the natural network address and have the masks longer than or equal to the natural mask will be displayed.
Description
Use the display fib ip-address command to display FIB entries that match the specified destination IP address.
Examples
# Display the FIB entries that match the natural network of 10.1.0.0 and have the masks longer than or equal to the natural mask.
<Sysname> display fib 10.1.0.0 longer
Route Entry Count: 2
Flag:
U:Useable G:Gateway H:Host B:Blackhole D:Dynamic S:Static
R:Reject L:Generated by ARP or ESIS
Destination/Mask Nexthop Flag TimeStamp Interface Token
10.0.0.0/8 0.0.0.0 U t[1141140133] Vlan1 invalid
10.1.1.1/32 127.0.0.1 HU t[1141140133] InLoop0 invalid
For description about the above output, refer to Table 1-1.
display fib statistics
Syntax
display fib statistics [ vpn-instance ]
View
Any view
Parameters
None
Description
Use the display fib statistics command to display statistics about the FIB entries.
Examples
# View statistics about the FIB entries.
<Sysname> display fib statistics
Route Entry Count : 2
Table 1-2 Description on the fields of the display fib statistics command
|
Field |
Description |
|
Route Entry Count |
Number of FIB entries |
display icmp statistics
Syntax
display icmp statistics [ slot slot-number ]
View
Any view
Default Level
1: Monitor level
Parameters
slot slot-number: Displays the ICMP statistics on a slot.
Description
Use the display icmp statistics command to display ICMP statistics.
Related commands: display ip interface (in IP Addressing Commands of the IP Services Volume), reset ip statistics.
Examples
# Display ICMP statistics.
<Sysname> display icmp statistics
Input: bad formats 0 bad checksum 0
echo 5 destination unreachable 0
source quench 0 redirects 0
echo reply 10 parameter problem 0
timestamp 0 information request 0
mask requests 0 mask replies 0
time exceeded 0
Output:echo 10 destination unreachable 0
source quench 0 redirects 0
echo reply 5 parameter problem 0
timestamp 0 information reply 0
mask requests 0 mask replies 0
time exceeded 0
Table 1-3 display icmp statistics command output description
|
Field |
Description |
|
bad formats |
Number of input wrong format packets |
|
bad checksum |
Number of input wrong checksum packets |
|
echo |
Number of input/output echo packets |
|
destination unreachable |
Number of input/output destination unreachable packets |
|
source quench |
Number of input/output source quench packets |
|
redirects |
Number of input/output redirection packets |
|
echo reply |
Number of input/output replies |
|
parameter problem |
Number of input/output parameter problem packets |
|
timestamp |
Number of input/output time stamp packets |
|
information request |
Number of input information request packets |
|
mask requests |
Number of input/output mask requests |
|
mask replies |
Number of input/output mask replies |
|
information reply |
Number of output information reply packets |
|
time exceeded |
Number of input/output expiration packets |
display ip socket
Syntax
display ip socket [ socktype sock-type ] [ task-id socket-id ] [ slot slot-number ]
View
Any view
Default Level
1: Monitor level
Parameters
socktype sock-type: Displays the socket information of this type. The sock type is in the range 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 1 to 100.
socket-id: Displays the information of the socket. Socket ID is in the range 0 to 3072.
slot slot-number: Displays the socket information of the slot.
Description
Use the display ip socket command to display socket information.
Examples
# Display all 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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
socket option = 0,
socket state = SS_PRIV SS_NBIO SS_ASYNC
Table 1-4 display ip socket command output description
|
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 |
|
LA |
Local address and local port number |
|
FA |
Remote address and remote port number |
|
sndbuf |
Sending buffer size of the socket |
|
rcvbuf |
Receiving buffer size of the socket |
|
sb_cc |
Current data size in the sending buffer (It is available only for TCP that can buffer data) |
|
rb_cc |
Data size currently in the receiving buffer |
|
socket option |
Socket option |
|
socket state |
Socket state |
display ip statistics
Syntax
display ip statistics [ slot slot-number ]
View
Any view
Default Level
1: Monitor level
Parameters
slot slot-number: Displays statistics of IP packets on the slot.
Description
Use the display ip statistics command to display statistics of IP packets.
Related commands: display ip interface (in IP Addressing Commands of the IP Services Volume), reset ip statistics.
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 1-5 display ip statistics command output description
|
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 |
|
timeouts |
Total number of reassembly timeout fragments |
|
display tcp statistics
Syntax
display tcp statistics
View
Default Level
1: Monitor level
Parameters
None
Description
Use the display tcp statistics command to display statistics of TCP traffic.
Related commands: display tcp status, reset tcp statistics.
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 1-6 display tcp statistics command output description
|
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 with MD5 authentication |
|
|
Packets permitted with MD5 authentication |
Number of packets permitted with MD5 authentication |
|
display tcp status
Syntax
display tcp status
View
Any view
Default Level
1: Monitor level
Parameters
None
Description
Use the display tcp status command to display status of all TCP connections for monitoring TCP connections.
Examples
# Display status of all TCP connections.
<Sysname> display tcp status
*: TCP MD5 Connection
TCPCB Local Add:port Foreign Add:port State
ca3f8244 0.0.0.0:23 0.0.0.0:0 Listening
ca3f8f04 0.0.0.0:80 0.0.0.0:0 Listening
ca3f79c4 0.0.0.0:7547 0.0.0.0:0 Listening
ca562cc4 192.168.0.74:23 192.168.0.2:1650 Established
Table 1-7 display tcp status command output description
|
Field |
Description |
|
* |
If the status information of a TCP connection contains *, the TCP adopts the MD5 algorithm for authentication. |
|
TCPCB |
TCP control block |
|
Local Add:port |
Local IP address and port number |
|
Foreign Add:port |
Remote IP address and port number |
|
State |
State of the TCP connection |
display udp statistics
Syntax
display udp statistics
View
Any view
Default Level
1: Monitor level
Parameters
None
Description
Use the display udp statistics command to display statistics of UDP packets.
Related commands: reset udp statistics.
Examples
# Display statistics of UDP packets.
<Sysname> display udp statistics
Received packets:
Total: 0
checksum error: 0
shorter than header: 0, data length larger than packet: 0
unicast(no socket on port): 0
broadcast/multicast(no socket on port): 0
not delivered, input socket full: 0
input packets missing pcb cache: 0
Sent packets:
Total: 0
Table 1-8 display udp statistics command output description
|
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 upper layer due to socket buffer being full |
|
|
input packets missing pcb cache |
Number of packets without matching protocol control block (PCB) cache |
|
|
Sent packets: |
Total |
Total number of UDP packets sent |
ip forward-broadcast (interface view)
Syntax
ip forward-broadcast [ acl acl-number ]
undo ip forward-broadcast
View
Interface view
Default Level
2: System level
Parameters
acl acl-number: Number of an ACL from 2000 to 3999. From 2000 to 2999 are numbers for basic ACLs, and from 3000 to 3999 are numbers for advanced ACLs. Only directed broadcasts permitted by the ACL can be forwarded.
Description
Use the ip forward-broadcast command to enable the interface to forward directed broadcasts.
Use the undo ip forward-broadcast command to disable an interface from forwarding directed broadcasts.
By default, an interface is disabled from forwarding directed broadcasts.
Examples
# Allow VLAN-interface 2 to forward directed broadcasts permitted by ACL 2001.
<Sysname> system-view
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] ip forward-broadcast acl 2001
ip forward-broadcast (system view)
Syntax
ip forward-broadcast
undo ip forward-broadcast
View
System view
Default Level
2: System level
Parameters
None
Description
Use the ip forward-broadcast command to enable the device to receive directed broadcasts.
Use the undo ip forward-broadcast command to disable the device from receiving directed broadcasts.
By default, the device is disabled from receiving directed broadcasts.
Examples
# Enable the device to receive directed broadcasts.
<Sysname> system-view
[Sysname] ip forward-broadcast
ip redirects enable
Syntax
ip redirects enable
undo ip redirects
View
System view
Default Level
2: System level
Parameters
None
Description
Use the ip redirects enable command to enable sending of ICMP redirection packets.
Use the undo ip redirects command to disable sending of ICMP redirection packets.
This feature is disabled by default.
Examples
# Enable sending of ICMP redirect packets.
<Sysname> system-view
[Sysname] ip redirects enable
ip ttl-expires enable
Syntax
ip ttl-expires enable
undo ip ttl-expires
View
System view
Default Level
2: System level
Parameters
None
Description
Use the ip ttl-expires enable command to enable the sending of ICMP timeout packets.
Use the undo ip ttl-expires command to disable sending ICMP timeout packets.
Sending ICMP timeout packets is disabled by default.
If the feature is disabled, the device will not send TTL timeout ICMP packets, but still send “reassembly timeout” ICMP packets.
Examples
# Enable sending ICMP timeout packets.
<Sysname> system-view
[Sysname] ip ttl-expires enable
ip unreachables enable
Syntax
ip unreachables enable
undo ip unreachables
View
System view
Default Level
2: System level
Parameters
None
Description
Use the ip unreachables enable command to enable the sending of ICMP destination unreachable packets.
Use the undo ip unreachables command to disable sending ICMP destination unreachable packets.
Sending ICMP destination unreachable packets is disabled by default.
Examples
# Enable sending ICMP destination unreachable packets.
<Sysname> system-view
[Sysname] ip unreachables enable
reset ip statistics
Syntax
reset ip statistics [ slot slot-number ]
View
User view
Default Level
2: System level
Parameters
slot slot-number: Clears IP packet statistics on the specified slot.
Description
Use the reset ip statistics command to clear statistics of IP packets.
Related commands: display ip interface (in IP Addressing Commands of the IP Services Volume), display ip statistics.
Examples
# Clear statistics of IP packets.
<Sysname> reset ip statistics
reset tcp statistics
Syntax
reset tcp statistics
View
User view
Default Level
2: System level
Parameters
None
Description
Use the reset tcp statistics command to clear statistics of TCP traffic.
Related commands: display tcp statistics.
Examples
# Display statistics of TCP traffic.
<Sysname> reset tcp statistics
tcp timer fin-timeout
Syntax
tcp timer fin-timeout time-value
undo tcp timer fin-timeout
View
System view
Default Level
2: System level
Parameters
time-value: Length of the TCP finwait timer in seconds, ranging from 76 to 3,600.
Description
Use the tcp timer fin-timeout command to configure the length of the TCP finwait timer.
Use the undo tcp timer fin-timeout command to restore the default.
By default, the length of the TCP finwait timer is 675 seconds.
Note that the actual length of the finwait timer is determined by the following formula:
Actual length of the finwait timer = (Configured length of the finwait timer – 75) + configured length of the synwait timer
Related commands: tcp timer syn-timeout, tcp window.
Examples
# Set the length of the TCP finwait timer to 800 seconds.
<Sysname> system-view
[Sysname] tcp timer fin-timeout 800
tcp timer syn-timeout
Syntax
tcp timer syn-timeout time-value
undo tcp timer syn-timeout
View
System view
Default Level
2: System level
Parameters
time-value: Length of the TCP finwait timer in seconds, ranging from 2 to 600.
Description
Use the tcp timer syn-timeout command to configure the length of the TCP synwait timer.
Use the undo tcp timer syn-timeout command to restore the default.
By default, the length of the TCP synwait timer is 75 seconds.
Related commands: tcp timer fin-timeout, tcp window.
Examples
# Set the length of the TCP synwait timer to 80 seconds.
<Sysname> system-view
[Sysname] tcp timer syn-timeout 80
tcp window
Syntax
tcp window window-size
undo tcp window
View
System view
Default Level
2: System level
Parameters
window-size: Receiving/sending buffer size of TCP connection in KB, ranging from 1 to 32.
Description
Use the tcp window command to configure the receiving/sending buffer size of TCP connection.
Use the undo tcp window command to restore the default.
The TCP receiving/sending buffer is 8 KB by default.
Related commands: tcp timer fin-timeout, tcp timer syn-timeout.
Examples
# Configure the receiving/sending buffer of TCP connection as 3 KB.
<Sysname> system-view
[Sysname] tcp window 3
