Table Of Contents

T Commands

tacacs+ enable

tacacs-server host

tacacs-server key

tacacs-server timeout

tail

tcp-connection

tcp cwm

tcp keepalive-timeout

tcp maximum-bandwidth-kbps

tcp maximum-bandwidth-mbps

tcp max-jitter

tcp max-retransmissions

tcp min-retransmit-time

tcp pmtu-enable

tcp qos control

tcp sack-enable

tcp send-buffer-size

telnet

telnet server enable

terminal

time-stamp

tlport alpa-cache

traceroute

trunk protocol enable

T Commands

---

The commands in this chapter apply to the Cisco MDS 9000 Family of multilayer directors and fabric switches. All commands are shown here in alphabetical order regardless of command mode. See the "Command Modes" section to determine the appropriate mode for each command. For more information, refer to the Cisco MDS 9000 Family Configuration Guide.

•tacacs+ enable

•tacacs-server host

•tacacs-server key

•tacacs-server timeout

•tail

•tcp-connection

•tcp cwm

•tcp keepalive-timeout

•tcp maximum-bandwidth-kbps

•tcp max-retransmissions

•tcp min-retransmit-time

•tcp pmtu-enable

•tcp qos control

•tcp sack-enable

•tcp send-buffer-size

•telnet

•telnet server enable

•terminal

•time-stamp

•tlport alpa-cache

•traceroute

•trunk protocol enable

tacacs+ enable

To enable TACACS+ in a switch, use the tacacs+ enable command in configuration mode. The disable this feature, use the no form of the command.

tacacs+ enable

no tacacs+ enable

Syntax Description

This command has no arguments or keywords.

Defaults

None.

Command Modes

Configuration mode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.3(1).

Usage Guidelines

Further TACACS+ commands are only available when the TACACS+ feature is enabled.

Using SHA-1 as the hash algorithm may prevent RADIUS or TACACS+ usage.

Examples

switch# config t

switch(config)# tacacs+ enable

Related Commands

Command	Description
show tacacs-server	Displays TACACS+ server information.

tacacs-server host

To configure TACACS+ server options on a switch, use the tacacs-server host command in configuration mode. Use the no form of the command to revert to factory defaults.

tacacs-server host {server-name | ip-address}
[key [0|7] shared-secret] [port port-number] [timeout seconds]

no tacacs-server host {server-name | ip-address}
[key [0|7] shared-secret] [port port-number] [timeout seconds]

Syntax Description

server-name	Enters TACACS+ server DNS name. The maximum character size is 256.
ip-address	Enters TACACS+ server IP address.
key	TACACS+ server's shared secret.
0	Configures a preshared key specified in clear text (indicated by 0) to authenticate communication between the TACACS+ client and server. This is the default.
7	Configures a preshared key specified in encrypted text (indicated by 7) to authenticate communication between the TACACS+ client and server.
shared secret	Configures a preshared key to authenticate communication between the TACACS+ client and server.
port port-number	TACACS+ server port for authentication. The range is 1 to 65535.
timeout	TACACS+ server timeout period in seconds.
seconds	Specifies the time (in seconds) between retransmissions to the TACACS+ server. The range is 1 to 60 seconds.

Defaults

Timeout: 1 second.

Command Modes

Configuration mode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.3(1).

Usage Guidelines

This command is only available when the TACACS+ feature is enabled using the tacacs+ enable command.

Examples

The following example configures TACACS+ authentication.

switch# config t

switch(config)# tacacs-server host 10.10.2.3 key HostKey 

switch(config)# tacacs-server host tacacs2 key 0 abcd 

switch(config)# tacacs-server host tacacs3 key 7 1234 

Related Commands

Command	Description
show tacacs-server	Displays TACACS+ server information.
tacacs+ enable	Enable TACACS+.

tacacs-server key

To configure a global TACACS+ shared secret, use the tacacs-server key command. Use the no form of this command to removed a configured shared secret.

tacacs-server key [0 | 7] shared-secret

no tacacs-server key [0 | 7] shared-secret

Syntax Description

key	Global TACACS+ shared secret.
0	Configures a preshared key specified in clear text (indicated by 0) to authenticate communication between the TACACS+ client and server. This is the default.
7	Configures a preshared key specified in encrypted text (indicated by 7) to authenticate communication between the TACACS+ client and server.
shared-secret	Configures a preshared key to authenticate communication between the TACACS+ client and server.

Defaults

None.

Command Modes

Configuration mode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.0(2).

Usage Guidelines

You need to configure the TACACS+ preshared key to authenticate the switch to the TACACS+ server. The length of the key is restricted to 65 characters and can include any printable ASCII characters (white spaces are not allowed). You can configure a global key to be used for all TACACS+ server configurations on the switch. You can override this global key assignment by explicitly using the key option in the tacacs-server host command.

This command is only available when the TACACS+ feature is enabled using the tacacs+ enable command.

Examples

The following example configures TACACS+ server shared keys.

switch# config t

switch(config)# tacacs-server key AnyWord

switch(config)# tacacs-server key 0 AnyWord 

switch(config)# tacacs-server key 7 public 

Related Commands

Command	Description
show tacacs-server	Displays TACACS+ server information.
tacacs+ enable	Enable TACACS+.

tacacs-server timeout

To specify the time between retransmissions to the TACACS+ servers, use the tacacs-server timeout command. You can revert the retransmission time to its default by issuing the no form of this command.

tacacs-server timeout seconds

notacacs-server timeout seconds

Syntax Description

timeout	RADIUS server timeout period in seconds.
seconds	Specifies the time (in seconds) between retransmissions to the RADIUS server. The default is one (1) second and the valid range is 1 to 60 seconds.

Defaults

None.

Command Modes

Configuration mode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.3(2).

Usage Guidelines

This command is only available when the TACACS+ feature is enabled using the tacacs+ enable command.

Examples

The following example configures the TACACS+ server timeout value.

switch# config t

switch(config)# tacacs-server timeout 30 

Related Commands

Command	Description
show tacacs-server	Displays TACACS+ server information.
tacacs+ enable	Enable TACACS+.

tail

To display the last lines (tail end) of a specified file, use the tail command in EXEC mode.

tail filename [number-of-lines]

Syntax Description

filename	The name of the file for which you want to view the last lines.
number-of-lines	(Optional) The number of lines you want to view. The range is 0 to 80 lines.

Defaults

Displays the last 10 lines.

Command Modes

EXEC mode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.0(2).

Usage Guidelines

You need two separate CLI terminals to use this command. In one terminal, execute the run-script or any other desired command. In the other, issue the tail command for the mylog file. On the second terminal session, you will see the last lines of the mylog file (as it grows) that is being saved in response to the command issued in the first terminal.

If you specify a long file and would like to exit in the middle, enter Ctrl-c to exit this command.

Examples

The following example displays the last lines (tail end) of a specified file.

switch# run-script slot0:test mylog

In another terminal, issue the tail command for the mylog file.

switch# tail mylog

config t

In the second CLI terminal, you see the last lines of the mylog file (as it grows) that is being saved in response to the command issued in the first terminal.

tcp-connection

To configure the number of TCP connections for the FCIP interface, use the tcp-connection command. To revert to the default, use the no form of the command.

tcp-connection number

no tcp-connection number

Syntax Description

number

Enters the number of attempts (1 or 2).

Defaults

Two attempts.

Command Modes

Interface configuration submode

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.1(1).

Usage Guidelines

Access this command from the switch(config-if)# submode.

Use the tcp-connection option to specify the number of TCP connections from a FCIP link. By default, the switch tries two (2) TCP connections for each FCIP link.

Examples

The following example configures the TCP connections.

switch# config t

switch(config)# interface fcip 50

switch(config-if)# tcp-connection 1

switch(config-if)# no tcp-connection 1

Related Commands

Command	Description
show interface fcip	Displays an interface configuration for a specified FCIP interface.

tcp cwm

To configure congestion window monitoring (CWM) TCP parameters, use the tcp cwm command. Use the no form of this command to disable this feature or revert to its factory defaults.

tcp cwm [burstsize size]

no tcp cwm [burstsize size]

Syntax Description

burstsize size

Specifies the burstsize ranging from 10 to 100 KB.

Defaults

Enabled.

The default FCIP burst size is 10 KB.

The default iSCSI burst size is 50 KB

Command Modes

FCIP profile configuration submode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.3(4).

Usage Guidelines

Use these TCP parameters to control TCP retransmission behavior in a switch.

Examples

The following example configures a FCIP profile and enables congestion monitoring.

switch# config t

switch(config)# fcip profile 5

switch(config-profile)# tcp cwm

The following example assigns the burstsize value at 20 KB:

switch(config-profile)# tcp cwm burstsize 20

The following example disables congestion monitoring.

switch(config-profile)# no tcp cwm

The following example leaves the CWM feature in an enabled state but changes the burstsize to the 
default of 10 KB.

switch(config-profile)# no tcp cwm burstsize 25

Related Commands

Command	Description
fcip profile	Configures FCIP profile parameters.
show fcip profile	Displays FCIP profile information.

tcp keepalive-timeout

To configure the interval between which the TCP connection verifies if the FCIP link is functioning, use the tcp keepalive-timeout command. Use the no form of this command to disable this feature or revert to its factory defaults.

tcp keepalive-timeout seconds

no tcp keepalive-timeout seconds

Syntax Description

seconds

Specifies the time in seconds. The range is 1 to 7200.

Defaults

60 seconds.

Command Modes

FCIP profile configuration submode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.1(1).

Usage Guidelines

This command can be used to detect FCIP link failures.

Examples

The following example configures a FCIP profile:

switch# config t

switch(config)# fcip profile 5

switch(config-profile)#

The following example specifies the keepalive timeout interval for the TCP connection:

switch(config-profile)# tcp keepalive-timeout 120

Related Commands

Command	Description
fcip profile	Configures FCIP profile parameters.
show fcip profile	Displays FCIP profile information.

tcp maximum-bandwidth-kbps

To manage the TCP window size in Kbps, use the tcp maximum-bandwidth-kbps command. Use the no form of this command to disable this feature or revert to its factory defaults.

tcp max-bandwidth-kbps bandwidth min-available-bandwidth-kbps threshold {round-trip-time-ms milliseconds | round-trip-time-us microseconds}

no tcp max-bandwidth-kbps bandwidth min-available-bandwidth-kbps threshold {round-trip-time-ms milliseconds | round-trip-time-us microseconds}

Syntax Description

bandwidth	Specifies the Kbps bandwidth. The range is 1000 to 1000000.
min-available-bandwidth-kbps	Configures the minimum slow start threshold.
threshold	Specifies the Kbps threshold. The range is 1000 to 1000000.
round-trip-time-ms milliseconds	Configures the estimated round trip time across the IP network to reach the FCIP peer end point in milliseconds. The range is 0 to 300.
round-trip-time-us microeconds	Configures the estimated round trip time across the IP network to reach the FCIP peer end point in microseconds. The range is 0 to 300000.

Defaults

Enabled.

The FCIP defaults are max-bandwidth = 1G, min-available-bandwidth = 500 Kbps, and round-trip-time =1 ms.

The iSCSI defaults are max-bandwidth = 1G, min-available-bandwidth = 70 Kbps, and round-trip-time =1 ms.

Command Modes

FCIP profile configuration submode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.1(1).

Usage Guidelines

The maximum-bandwidth option and the round-trip-time option together determine the window size.

The minimum-available-bandwidth option and the round-trip-time option together determine the threshold below which TCP aggressively increases its size. After it reaches the threshold the software uses standard TCP rules to reach the maximum available bandwidth.

Examples

The following example configures a FCIP profile:

switch# config t

switch(config)# fcip profile 5

switch(config-profile)#

The following example configures the maximum available bandwidth at 900 Kbps, the minimum slow start threshold as 300 Kbps, and the round trip time as 10 milliseconds:

switch(config-profile)# tcp max-bandwidth-kbps 900 min-available-bandwidth-kbps 300 
round-trip-time-ms 10

The following example reverts to the factory defaults:

switch(config-profile)# no tcp max-bandwidth-kbps 900 min-available-bandwidth-kbps 300 
round-trip-time-ms 10

The following example configures the maximum available bandwidth at 2000 Kbps, the minimum slow start threshold as 2000 Kbps, and the round trip time as 200 microseconds:

switch(config-profile)# tcp max-bandwidth-kbps 2000 min-available-bandwidth-kbps 2000 
round-trip-time-us 200

Related Commands

Command	Description
fcip profile	Configures FCIP profile parameters.
show fcip profile	Displays FCIP profile information.

tcp maximum-bandwidth-mbps

To manage the TCP window size in Mbps, use the tcp maximum-bandwidth-mbps command. Use the no form of this command to disable this feature or revert to its factory defaults.

tcp max-bandwidth-mbps bandwidth min-available-bandwidth-mbps threshold {round-trip-time-ms milliseconds | round-trip-time-us microseconds}

no tcp max-bandwidth-mbps bandwidth min-available-bandwidth-mbps threshold {round-trip-time-ms milliseconds | round-trip-time-us microseconds}

Syntax Description

bandwidth	Specifies the Mbps bandwidth. The range is 1 to 1000.
min-available-bandwidth-mbps	Configures the minimum slow start threshold.
threshold	Specifies the Mbps threshold. The range is 1 to 1000.
round-trip-time-ms milliseconds	Configures the estimated round trip time across the IP network to reach the FCIP peer end point in milliseconds. The range is 0 to 300.
round-trip-time-us microeconds	Configures the estimated round trip time across the IP network to reach the FCIP peer end point in microseconds. The range is 0 to 300000.

Defaults

Enabled.

The FCIP defaults are max-bandwidth = 1G, min-available-bandwidth = 500 Kbps, and round-trip-time =1 ms.

The iSCSI defaults are max-bandwidth = 1G, min-available-bandwidth = 70 Kbps, and round-trip-time =1 ms.

Command Modes

FCIP profile configuration submode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.1(1).

Usage Guidelines

The maximum-bandwidth option and the round-trip-time option together determine the window size.

The minimum-available-bandwidth option and the round-trip-time option together determine the threshold below which TCP aggressively increases its size. After it reaches the threshold the software uses standard TCP rules to reach the maximum available bandwidth.

Examples

The following example configures a FCIP profile:

switch# config t

switch(config)# fcip profile 5

switch(config-profile)#

The following example configures the maximum available bandwidth at 900 Mbps, the minimum slow start threshold as 300 Mbps, and the round trip time as 10 milliseconds:

switch(config-profile)# tcp max-bandwidth-mbps 900 min-available-bandwidth-mbps 300 
round-trip-time-ms 10

The following example reverts to the factory defaults:

switch(config-profile)# no tcp max-bandwidth-mbps 900 min-available-bandwidth-mbps 300 
round-trip-time-ms 10

The following example configures the maximum available bandwidth at 2000 Mbps, the minimum slow start threshold as 2000 Mbps, and the round trip time as 200 microseconds:

switch(config-profile)# tcp max-bandwidth-mbps 2000 min-available-bandwidth-mbps 2000 
round-trip-time-us 200

Related Commands

Command	Description
fcip profile	Configures FCIP profile parameters.
show fcip profile	Displays FCIP profile information.

tcp max-jitter

To estimate the maximum delay jitter experienced by the sender in microseconds, use the tcp max-jitter command. Use the no form of this command to disable this feature or revert to its factory defaults.

tcp max-jitter microseconds

no tcp max-jitter microseconds

Syntax Description

microseconds

Specifies the delay time in microseconds ranging from 0 to 10000.

Defaults

Enabled.

The default value is 100 microseconds for FCIP and 500 microseconds for iSCSI interfaces.

Command Modes

FCIP profile configuration submode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.3(4).

Usage Guidelines

None.

Examples

The following example configures delay jitter time:

switch# config t

Enter configuration commands, one per line.  End with CNTL/Z.

switch(config)# fcip profile 3

switch(config-profile)# tcp max-jitter 600

switch(config-profile)# do show fcip profile 3

FCIP Profile 3

    Internet Address is 10.3.3.3  (interface GigabitEthernet2/3)

    Tunnels Using this Profile: fcip3

    Listen Port is 3225

    TCP parameters

        SACK is enabled

        PMTU discovery is enabled, reset timeout is 3600 sec

        Keep alive is 60 sec

        Minimum retransmission timeout is 200 ms

        Maximum number of re-transmissions is 4

        Send buffer size is 0 KB

        Maximum allowed bandwidth is 1000000 kbps

        Minimum available bandwidth is 500000 kbps

        Estimated round trip time is 1000 usec

        Congestion window monitoring is enabled, burst size is 10 KB

        Configured maximum jitter is 600 us

Related Commands

Command	Description
fcip profile	Configures FCIP profile parameters.
show fcip profile	Displays FCIP profile information.

tcp max-retransmissions

To specify the maximum number of times a packet is retransmitted before TCP decides to close the connection, use the tcp max-retransmissions command. Use the no form of this command to disable this feature or revert to its factory defaults.

tcp max-retransmissions number

no tcp max-retransmissions number

Syntax Description

number

Specifies the maximum number. The range is 1 to 8.

Defaults

Enabled

Command Modes

FCIP profile configuration submode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.1(1).

Usage Guidelines

The default is 4 and the range is from 1 to 8 retransmissions.

Examples

The following example configures a FCIP profile:

switch# config t

switch(config)# fcip profile 5

The following example specifies the maximum number of retransmissions :

switch(config-profile)# tcp max-retransmissions 6

Related Commands

Command	Description
fcip profile	Configures FCIP profile parameters.
show fcip profile	Displays FCIP profile information.

tcp min-retransmit-time

To control the minimum amount of time TCP waits before retransmitting, use the tcp min-retransmit-time command. Use the no form of this command to disable this feature or revert to its factory defaults.

tcp min-retransmit-time milliseconds

no tcp min-retransmit-time milliseconds

Syntax Description

milliseconds

Specifies the time in milliseconds. The range is 200 to 5000.

Defaults

300 milliseconds.

Command Modes

FCIP profile configuration submode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.1(1).

Usage Guidelines

None.

Examples

The following example configures a FCIP profile:

switch# config t

switch(config)# fcip profile 5

switch(config-profile)#

The following example specifies the minimum TCP retransmit time for the TCP connection:

switch(config-profile)# tcp min-retransmit-time 500 

Related Commands

Command	Description
fcip profile	Configures FCIP profile parameters.
show fcip profile	Displays FCIP profile information.

tcp pmtu-enable

To configure path MTU (PMTU) discovery, use the tcp pmtu-enable command. Use the no form of this command to disable this feature or revert to its factory defaults.

tcp pmtu-enable [reset-timeout seconds]

no tcp pmtu-enable [reset-timeout seconds]

Syntax Description

reset-timeout seconds

Specifies the PMTU reset timeout. The range is 60 to 3600 seconds.

Defaults

Enabled.

3600 seconds.

Command Modes

FCIP profile configuration submode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.1(1).

Usage Guidelines

None.

Examples

The following example configures a FCIP profile:

switch# config t

switch(config)# fcip profile 5

switch(config-profile)# 

The following example disables PMTU discovery:

switch(config-profile)# no tcp pmtu-enable

The following example enables PMTU discovery with a default of 3600 seconds:

switch(config-profile)# tcp pmtu-enable

The following example specifies the PMTU reset timeout to 90 seconds:

switch(config-profile)# tcp pmtu-enable reset-timeout 90

The following example leaves the PMTU in an enabled state but changes the timeout to the default of 3600 seconds:

switch(config-profile)# no tcp pmtu-enable reset-timeout 600

Related Commands

Command	Description
fcip profile	Configures FCIP profile parameters.
show fcip profile	Displays FCIP profile information.

tcp qos control

To specify the differentiated services code point (DSCP) value to mark all IP packets (type of service—TOS field in the IP header), use the tcp qos control command. Use the no form of this command to disable this feature or revert to its factory defaults.

tcp qos control value data value

no tcp qos control value data value

Syntax Description

value	Applies the control DSCP value to all FCIP frames in the control TCP connection.
data value	Applies the data DSCP value applies to all FCIP frames in the data connection.

Defaults

Enabled.

Command Modes

FCIP profile configuration submode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.1(1).

Usage Guidelines

Use these TCP parameters to control TCP retransmission behavior in a switch.

Examples

The following example configures a FCIP profile:

switch# config t

switch(config)# fcip profile 5

switch(config-profile)#

The following example configures the control TCP connection and data connection to mark all packets on that DSCP value:

switch(config-profile)# tcp qos control 3 data 5

Related Commands

Command	Description
fcip profile	Configures FCIP profile parameters.
show fcip profile	Displays FCIP profile information.

tcp sack-enable

To enable selective acknowledgment (SACK) to overcome the limitations of multiple lost packets during a TCP transmission, use the tcp command. Use the no form of this command to disable this feature or revert to its factory defaults.

tcp sack-enable

no tcp sack-enable

Syntax Description

This command has no arguments or keywords.

Defaults

Enabled

Command Modes

FCIP profile configuration submode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.1(1).

Usage Guidelines

The receiving TCP sends back SACK advertisements to the sender. The sender can then retransmit only the missing data segments.

Examples

The following example configures a FCIP profile:

switch# config t

switch(config)# fcip profile 5

switch(config-profile)#

The following example enables the SACK mechanism on the switch:

switch(config-profile)# tcp sack-enable

Related Commands

Command	Description
fcip profile	Configures FCIP profile parameters.
show fcip profile	Displays FCIP profile information.

tcp send-buffer-size

To define the required additional buffering—beyond the normal send window size —that TCP allows before flow controlling the switch's egress path for the FCIP interface, use the tcp send-buffer-size command. Use the no form of this command to disable this feature or revert to its factory defaults.

tcp send-buffer-size size

no tcp send-buffer-size size

Syntax Description

tcp	Configures TCP parameters for the FCIP profile.
send-buffer-size	Defines required additional buffering allowed by TCP.
size	Specifies the buffer size in KB. The range is 0 to 8192.

Defaults

Enabled.

The default FCIP buffer size is 0 KB.

The default iSCSI buffer size is 4096 KB

Command Modes

FCIP profile configuration submode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.3(4).

Usage Guidelines

None.

Examples

The following example configures a FCIP profile:

switch# config t

switch(config)# fcip profile 5

switch(config-profile)#

The following example configure the advertised buffer size to 5000 KB :

switch(config-profile)# tcp send-buffer-size 5000

Related Commands

Command	Description
fcip profile	Configures FCIP profile parameters.
show fcip profile	Displays FCIP profile information.

telnet

To log in to a host that supports Telnet, use the telnet command in EXEC mode.

telnet {hostname | ip-address} [port]

Syntax Description

hostname	Specifies a host name. Maximum length is 64 characters.
ip-address	Specifies an IP address.
port	(Optional) Specifies a port number. The range is 0 to 2147483647.

Defaults

None.

Command Modes

EXEC mode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.0(2).

Usage Guidelines

None.

Examples

The following example establishes a Telnet session to the specified IP address.

switch# telnet 172.22.91.153

Trying 172.22.91.153...

Connected to 172.22.91.153.

Login:xxxxxxxx

Password:xxxxxxxxx

switch# 

Related Commands

Command	Description
telnet server enable	Enables the Telnet server.

telnet server enable

To enable the Telnet server if you wish to return to a Telnet connection from a secure SSH connection, use the telnet server enable command. To disable the Telnet server, use the no form of this command

telnet server enable

no telnet server enable

Syntax Description

This command has no arguments or keywords.

Defaults

Enabled.

Command Modes

Configuration mode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.0(2).

Usage Guidelines

None.

Examples

The following example enables the Telnet server.

switch(config)# telnet server enable 

updated

The following example disables the Telnet server.

switch(config)# no telnet server enable 

updated

Related Commands

Command	Description
telnet	Logs in to a host that supports Telnet.

terminal

To configure terminal attributes, use the terminal command in EXEC mode. To revert to the defaults, use the no form of the command.

terminal {length lines | monitor | session-timeout | terminal-type type | tree-update |
width integer}

terminal no {length | monitor | session-timeout | terminal-type | width}

Syntax Description

length lines	Specifies the number of lines on the screen. The range is 0 to 512. Enter 0 to scroll continuously.
monitor	Copies Syslog output to the current terminal line.
session-timeout	Specifies the session timeout value in minutes. The range is 0 to 525600. Enter 0 to disable.
terminal-type type	Sets the terminal type. Maximum length is 80 characters.
tree-update	Updates the main parse tree.
width integer	Sets the width of the display terminal, from 0 to 80.

Defaults

The default number of lines for the length is 24. The default width is 80 lines.

Command Modes

EXEC

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.0(2).

Usage Guidelines

Remember that all terminal parameter-setting commands are set locally and do not remain in effect after a session is ended. You must perform this task at the EXEC prompt at each session to see the debugging messages.

If the length is not 24 and the width is not 80, then you need to set a length and width.

Examples

The following example displays debug command output and error messages during the current terminal session.

switch# terminal monitor

Aug  8 10:32:42 sup48 % LOG_PLATFORM-5-PLATFORM_MOD_CFG_PWRDN: Module 1 powered down

Aug  8 10:32:42 sup48 % LOG_PLATFORM-5-PLATFORM_MOD_PWRDN: Module 1 powered down

Aug  8 10:32:42 sup48 % LOG_PLATFORM-5-PLATFORM_MOD_INSERT: Module 1 has been inserted

Aug  8 10:33:12 sup48 % LOG_PLATFORM-5-PLATFORM_MOD_PWRON: Module 1 powered up

Aug  8 10:33:13 sup48 % LOG_MODULE-5-MOD_REG_OK: LCM - Registration succeeded for module 1 

Aug  8 10:38:15 sup48 % LOG_PLATFORM-5-PLATFORM_MOD_CFG_PWRDN: Module 1 powered down

Aug  8 10:38:15 sup48 % LOG_PLATFORM-5-PLATFORM_MOD_INSERT: Module 1 has been inserted

......

The following example stops the current terminal monitoring session.

switch# terminal no monitor

Related Commands

Command	Description
show terminal	Displays terminal configuration information.

time-stamp

To enable FCIP time stamps on a frame, use the time-stamp command. To disable this command for the selected interface, use the no form of the command.

time-stamp [acceptable-diff number]

no time-stamp [acceptable-diff number]

Syntax Description

acceptable-diff number

Configures the acceptable time difference for timestamps in milliseconds. The range is 500 to 10000.

Defaults

Disabled.

Command Modes

Interface configuration submode

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.1(1).

Usage Guidelines

Access this command from the switch(config-if)# submode.

The time-stamp option instructs the switch to discard frames that are older than a specified time.

Examples

The following example enables the timestamp for an FCIP interface.

switch# config t

switch(config)# interface fcip 50 

switch(config-if)# time-stamp 

switch(config-if)# time-stamp acceptable-diff 4000

Related Commands

Command	Description
show interface fcip	Displays the configuration for a specified FCIP interface.

tlport alpa-cache

To manually configure entries in an ALPA cache, use the tlport alpa-cache command

tlport alpa-cache interface interface pwwn pwwn alpa alpa

no tlport alpa-cache interface interface pwwn pwwn

Syntax Description

interface interface	Specifies a Fibre Channel interface.
pwwn pwwn	Specifies the peer WWN ID for the ALPA cache entry.
alpa alpa	Specifies the ALPA cache to which this entry is to be added.

Defaults

Disabled.

Command Modes

Configuration mode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.3(5).

Usage Guidelines

Generally, ALPA cache entries are automatically populated when an ALPA is assigned to a device. Use this command only if you wish to manually add further entries.

Examples

The following example configures the specified pWWN as a new entry in this cache

switch# config t

switch(config)# tlport alpa-cache interface fc1/2 pwwn 22:00:00:20:37:46:09:bd alpa 0x02

Related Commands

Command	Description
show tlport	Displays TL port information.

traceroute

To print the route an IP packet takes to a network host, use the traceroute command in EXEC mode.

traceroute {hostname | ip-address}

Syntax Description

host name	Specifies a host name. Maximum length is 64 characters.
ip-address	Specifies an IP address.

Defaults

None.

Command Modes

EXEC mode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.0(2).

Usage Guidelines

This command traces the route an IP packet follows to an internet host by launching UDP probe packets with a small TTL (time to live) then listening for an ICMP (Internet Control Message Protocol) "time exceeded" reply from a gateway.

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Note Probes start with a TTL of one and increase by one until encountering an ICMP "port unreachable." This means that the host was accessed or a maximum flag was hit. A line is printed showing the TTL, address of the gateway and round trip time of each probe. If the probe answers come from different gateways, the address of each responding system is printed.

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Examples

The following example prints the route IP packets take to the network host www.cisco.com.

switch# traceroute www.cisco.com

traceroute to www.cisco.com (171.71.181.19), 30 hops max, 38 byte packets

 1  kingfisher1-92.cisco.com (172.22.92.2)  0.598 ms  0.470 ms  0.484 ms

 2  nubulab-gw1-bldg6.cisco.com (171.71.20.130)  0.698 ms  0.452 ms  0.481 ms

 3  172.24.109.185 (172.24.109.185)  0.478 ms  0.459 ms  0.484 ms

 4  sjc12-lab4-gw2.cisco.com (172.24.111.213)  0.529 ms  0.577 ms  0.480 ms

 5  sjc5-sbb4-gw1.cisco.com (171.71.241.174)  0.521 ms  0.495 ms  0.604 ms

 6  sjc12-dc2-gw2.cisco.com (171.71.241.230)  0.521 ms  0.614 ms  0.479 ms

 7  sjc12-dc2-cec-css1.cisco.com (171.71.181.5)  2.612 ms  2.093 ms  2.118 ms

 8  www.cisco.com (171.71.181.19)  2.496 ms *  2.135 ms

trunk protocol enable

To configure the trunk protocol, use the trunk protocol enable command in configuration mode. To disable the trunk protocol, use the no form of the command.

trunk protocol enable

no trunk protocol enable

Syntax Description

This command has no other arguments or keywords.

Defaults

Disabled.

Command Modes

Configuration mode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.0(2).

Usage Guidelines

If the trunking protocol is disabled on a switch, no port on that switch can apply new trunk configurations. Existing trunk configurations are not affected—the TE port continues to function in trunking mode, but only supports traffic in VSANs that it negotiated previously (when the trunking protocol was enabled). Also, other switches that are directly connected to this switch are similarly affected on the connected interfaces. In some cases, you may need to merge traffic from different port VSANs across a non-trunking ISL. If so, you need to disable the trunking protocol.

Examples

The following example shows how to enable and disable the trunk protocol feature.

switch# config t

switch(config)# trunk protocol enable

switch(config)# no trunk protocol enable

Related Commands

Command	Description
show trunk protocol	Displays the trunk protocol status.