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ntp source-interface

In many cases network operators prefer to have a single IP address for the switch that is used for management operations like switch configuration, receiving remote log files, ping, and so forth. That IP address is needed for building firewall rules so that network switches can be easily identified. It is also required for identifying management traffic and exact management target in network logs.

The following protocols are supported by the feature:

  • FTP
  • TFTP
  • NTP
  • Syslog
  • TACACS
  • SSH, SSHD, SCP
  • Ping
  • Traceroute
  • SNMP

Commands

ssh server listen


ssh server listen <interface>
no ssh server listen <interface> 

Defines a source interface for ssh server.

Syntax DescriptioninterfaceInterface to bind.
Possible values: mgmt0, lo, or loopback 0-31

Default

N/A
Configuration Modeconfig
History3.7.1002
Example
switch (config)# ssh server listen loopback2
Related Commands
Notes

ssh client global source-interface 


ssh client global [vrf <vrf-name>] source-interface <interface>
no ssh client global [vrf <vrf-name>] source-interface <interface> 

Configures the source interface that binds the SSH client to a specific address used by the slogin command.

Syntax Descriptioninterface

Interface to bind.
Possible values: loopback0-31

vrf-nameVRF to be affected. If "vrf-name" parameter is not specified, "default" VRF will be used.

Default

N/A
Configuration Modeconfig
History3.7.1002
3.9.2000Added VRF option
Example
switch (config)# ssh client global source-interface loopback10
Related Commands
NotesThe <interface> must be in the <vrf-name>. Source-interface could be configured in any VRF that the configured service is enabled in.

ip ftp source-interface 


ip ftp [vrf <vrf-name>] source-interface <interface>
no ip ftp [vrf <vrf-name>] source-interface <interface>

Configures the source interface for ftp protocol.
The no form of the command disables the ftp source interface protocol.

Syntax Descriptioninterface

Interface to bind
Possible values: loopback0-31

vrf-nameVRF to be affected. If "vrf-name" parameter is not specified, "default" VRF will be used.

Default

N/A
Configuration Modeconfig
History3.7.1002
3.9.2000Added VRF option
Example
switch (config)# ip ftp source-interface loopback7
Related Commands
NotesThe <interface> must be in the <vrf-name>. The source-interface can be configured for each existing VRF.

ip tftp source-interface 


ip tftp [vrf <vrf-name>] source-interface <interface>
no ip tftp [vrf <vrf-name>] source-interface <interface>

Configures the source interface for tftp protocol.
The no form of the command disables the tftp source interface protocol.

Syntax Descriptioninterface

Interface to bind.
Possible values: loopback0-31

vrf-nameVRF to be affected. If "vrf-name" parameter is not specified, "default" VRF will be used.

Default

N/A
Configuration Modeconfig
History3.7.1002
3.9.2000Added VRF option
Example
switch (config)# ip tftp source-interface loopback7
Related Commands
NotesThe <interface> must be in the <vrf-name>. The source-interface can be configured for each existing VRF.

ip scp source-interface 


ip scp [vrf <vrf-name>] source-interface <interface>
no ip scp [vrf <vrf-name>] source-interface <interface>

Configures the source interface for scp protocol.
The no form of the command disables the scp source interface protocol.

Syntax Descriptioninterface

Interface to bind
Possible values: loopback0-31

vrf-nameVRF to be affected. If "vrf-name" parameter is not specified, "default" VRF will be used.

Default

N/A
Configuration Modeconfig
History3.8.1000
3.9.2000Added VRF option
Example
switch (config)# ip scp source-interface loopback7
Related Commands
NotesThe <interface> must be in the <vrf-name>. The source-interface can be configured for each existing VRF.

ip sftp source-interface 


ip sftp [vrf <vrf-name>] source-interface <interface>
no ip sftp [vrf <vrf-name>] source-interface <interface>

Configures the source interface for sftp protocol.
The no form of the command disables the sftp source interface protocol.

Syntax Descriptioninterface

Interface to bind
Possible values: loopback0-31

vrf-nameVRF to be affected. If "vrf-name" parameter is not specified, "default" VRF will be used.

Default

N/A
Configuration Modeconfig
History3.8.1000
3.9.2000Added VRF option
Example
switch (config)# ip sftp source-interface loopback7
Related Commands
NotesThe <interface> must be in the <vrf-name>. The source-interface can be configured for each existing VRF.

ip traceroute source-interface 


ip traceroute source-interface <interface>
no ip traceroute source-interface <interface>

Configures the source interface for traceroute protocol.
The no form of the command disables the traceroute source interface protocol.

Syntax Descriptioninterface

Interface to bind
Possible values: loopback0-31

Default

N/A
Configuration Modeconfig
History3.8.1000
3.9.2000Added VRF option
Example
switch (config)# ip traceroute source-interface loopback7
Related Commands
NotesThe <interface> must be in the <vrf-name>. The source-interface can be configured for each existing VRF.


logging source-interface


logging [vrf <vrf-name>] soucrce-interface <interface>
no logging [vrf <vrf-name>] source-interface <interface>

Configures the source interface for sending the log messages to remote servers.
The no form of the command disables the logging source interface protocol.

Syntax Descriptioninterface

Interface to bind
Possible values: loopback0-31

vrf-nameVRF to be affected. If "vrf-name" parameter is not specified, "default" VRF will be used.

Default

N/A
Configuration Modeconfig
History3.7.1002
3.9.0600Added notes
3.9.2000Added VRF option
Example
switch (config)# logging source-interface loopback7
Related Commands
Notes
  • Source interface is supported only for logging host using UDP and not supported for TCP
  • Changes in runtime in the dns regarding a logging host (changes of relation between hostname and ip) are not handled, logging source ip may stop working
  • The <interface> must be in the <vrf-name>. Source-interface could be configured in any VRF that the configured service is enabled in.

tacacs-server source-interface 


tacacs-server [vrf <vrf-name>] source-interface <interface>
no tacacs-server [vrf <vrf-name>] source-interface <interface>

Configures the source interface for tacacs protocol.
The no form of the command disables the tacacs source interface protocol.

Syntax Descriptioninterface

Interface to bind
Possible values: loopback0-31

vrf-nameVRF to be affected. If "vrf-name" parameter is not specified, "default" VRF will be used.

Default

N/A
Configuration Modeconfig
History3.7.1002
3.9.2000Added VRF option
Example
switch (config)# tacacs source-interface loopback23
Related Commands
Notes

The <interface> must be in the <vrf-name>. Source-interface must be in the same VRF that the configured service is enabled in.

ip icmp source-interface 


ip icmp [vrf <vrf-name>] source-interface <interface>
no ip icmp [vrf <vrf-name>] source-interface <interface>

Configures the source interface for icmp protocol (for ping requests).
The no form of the command disables the icmp source interface protocol.

Syntax Descriptioninterface

Interface to bind
Possible values: loopback0-31

vrf-nameVRF to be affected. If "vrf-name" parameter is not specified, "default" VRF will be used.

Default

N/A
Configuration Modeconfig
History3.7.1002
3.9.2000Added VRF option
Example
switch (config)# ip icmp source-interface loopback24
Related Commands
Notes<interface> must be in the <vrf-name>. Source-interface can be configured for each existing VRF.

ntp source-interface 


ntp [vrf <vrf-name>] soucrce-interface <interface>
no ntp [vrf <vrf-name>] source-interface <interface>

Configures the source interface for ntp protocol. This interface will be used for user requested and periodic ntp synchronization.
The no form of the command disables the ntp source interface protocol.

Syntax DescriptioninterfaceInterface to bind. Range: loopback0-31.
vrf-nameVRF to be affected. If "vrf-name" parameter is not specified, "default" VRF will be used.
DefaultN/A
Configuration Modeconfig
History3.7.1002
3.9.2000Added VRF option
Example
switch (config)# ntp source-interface loopback7
Related Commands
Notes
  • This command sets source IP for NTPD and NTP date
  • The <interface> must be in the <vrf-name>. Source-interface must be in the same VRF that the configured service is enabled in.

snmp-server source-interface


snmp-server [vrf <vrf-name>] source-interface <interface>
no snmp-server [vrf <vrf-name>] source-interface <interface>

Configures the source interface for sending SNMP traps and informs.
The no form of the command disables the snmp-server source interface protocol.

Syntax Descriptioninterface

Interface to bind
Range: loopback0-31

vrf-nameVRF to be affected. If "vrf-name" parameter is not specified, "default" VRF will be used.

Default

N/A
Configuration Modeconfig
History3.8.1000
3.9.2000Added VRF option
Example
switch (config) # snmp-server source-interface loopback7
Related Commandsshow snmp source-interface
Notes

The <interface> must be in the <vrf-name>. Source-interface could be configured in any VRF that the configured service is enabled in.

show ip ftp source-interface 


show ip ftp [vrf {<vrf-name>|all}] source-interface

Displays the source interface.

Syntax Descriptionvrf-nameDescribes VRF that will be affected by this command. If "vrf" parameter is not specified, the "default" VRF will be used implicitly.
DefaultN/A
Configuration ModeAny configuration mode
History3.7.1002
3.9.2000Added VRF option
Example
switch (config)# show ip ftp source-interface
Source IP for ftp client:
Configured: loopback7
Current : loopback7
IPv4-addr : 5.5.5.5
IPv6-addr : none

switch (config)# show ip ftp vrf all source-interface

VRF name: default

Source IP for ftp client:
  Configured: none
  Current   : none
  IPv4-addr : none
  IPv6-addr : none

VRF name: mgmt

Source IP for ftp client:
  Configured: loopback2
  Current   : loopback2
  IPv4-addr : 10.10.10.10
  IPv6-addr : none
Related Commands
Notes

show ip tftp source-interface 


show ip tftp [vrf {<vrf-name>|all}] source-interface

Displays the source interface.

Syntax Descriptionvrf-nameDescribes VRF that will be affected by this command. If "vrf" parameter is not specified, the "default" VRF will be used implicitly.
DefaultN/A
Configuration ModeAny configuration mode
History3.9.2000
Example
switch (config)# show ip tftp [vrf {<vrf-name>|all}] source-interface

Example:
show ip tftp vrf all source-interface

VRF name: default

Source IP for tftp client:
  Configured: none
  Current   : none
  IPv4-addr : none
  IPv6-addr : none

VRF name: mgmt

Source IP for tftp client:
  Configured: loopback2
  Current   : loopback2
  IPv4-addr : 10.10.10.10
  IPv6-addr : none
Related Commands
Notes

show ntp source-interface 


show ntp [vrf {<vrf-name>|all}] source-interface

Displays the source interface.

Syntax Descriptionvrf-nameDescribes VRF that will be affected by this command. If "vrf" parameter is not specified, the "default" VRF will be used implicitly.
DefaultN/A
Configuration ModeAny configuration mode
History3.7.1002
3.9.2000Added VRF option
Example
switch (config)# show ntp source-interface
Source IP for ntp client:
Configured: loopback2
Current : loopback2
IPv4-addr : 10.7.144.97
IPv6-addr : none

switch (config)# show ntp vrf all source-interface

VRF name: default

Source IP for ntp client:
  Configured: none
  Current   : none
  IPv4-addr : none
  IPv6-addr : none

VRF name: mgmt

Source IP for ntp client:
  Configured: loopback2
  Current   : loopback2
  IPv4-addr : 10.10.10.10
  IPv6-addr : none
Related Commands
Notes

show logging source-interface 


show logging [vrf {<vrf-name>|all}] source-interface

Displays the source interface.

Syntax Descriptionvrf-nameDescribes VRF that will be affected by this command. If "vrf" parameter is not specified, the "default" VRF will be used implicitly.
DefaultN/A
Configuration ModeAny configuration mode
History3.7.1002
3.9.2000Added VRF option
Example
switch (config)# show logging source-interface
Source IP for syslogd client:
Configured: loopback23
Current : loopback23
IPv4-addr : 1.3.5.7
IPv6-addr : none

switch (config)# show logging vrf all source-interface

VRF name: default

Source IP for syslogd client:
  Configured: none
  Current   : none
  IPv4-addr : none
  IPv6-addr : none

VRF name: mgmt

Source IP for syslogd client:
  Configured: loopback2
  Current   : loopback2
  IPv4-addr : 10.10.10.10
  IPv6-addr : none
Related Commands
Notes

show tacacs source-interface 


show tacacs [vrf {<vrf-name>|all}] source-interface

Displays the source interface.

Syntax Descriptionvrf-nameDescribes VRF that will be affected by this command. If "vrf" parameter is not specified, the "default" VRF will be used implicitly.
DefaultN/A
Configuration ModeAny configuration mode
History3.7.1002
3.9.2000Added VRF option.
Example
switch (config)# show tacacs source-interface
Source IP for tacacs client:
Configured: loopback3
Current : loopback3
IPv4-addr : 1.3.5.7
IPv6-addr : none

switch (config)# show tacacs vrf all source-interface

VRF name: default

Source IP for tacacs client:
  Configured: none
  Current   : none
  IPv4-addr : none

VRF name: mgmt

Source IP for tacacs client:
  Configured: loopback2
  Current   : loopback2
  IPv4-addr : 10.10.10.10
Related Commands
Notes

show ip icmp source-interface 


show ip icmp [vrf {<vrf-name>|all}] source-interface

Displays the source interface.

Syntax Descriptionvrf-nameDescribes VRF that will be affected by this command. If "vrf" parameter is not specified, the "default" VRF will be used implicitly.
DefaultN/A
Configuration ModeAny configuration mode
History3.7.1002
3.9.2000Added VRF option
Example
switch (config)# show icmp source-interface
Source IP for ping client:
Configured: none
Current : none
IPv4-addr : none
IPv6-addr : none

switch (config)# show ip icmp vrf all source-interface

VRF name: default

Source IP for ping client:
  Configured: none
  Current   : none
  IPv4-addr : none
  IPv6-addr : none

VRF name: mgmt

Source IP for ping client:
  Configured: loopback2
  Current   : loopback2
  IPv4-addr : 10.10.10.10
  IPv6-addr : none
Related Commands
Notes

show ip traceroute source-interface 


show ip traceroute [vrf {<vrf-name>|all}] source-interface

Displays the source interface.

Syntax Descriptionvrf-nameVRF that will be affected by this command. If "vrf" parameter is not specified, the "default" VRF will be used implicitly.
DefaultN/A
Configuration ModeAny configuration mode
History3.7.1002
3.9.2000Added VRF option
Example
switch (config)# show traceroute source-interface
Source IP for traceroute client:
Configured: none
Current : none
IPv4-addr : none
IPv6-addr : none

switch (config)# show ip traceroute vrf all source-interface

VRF name: default

Source IP for traceroute client:
  Configured: none
  Current   : none
  IPv4-addr : none
  IPv6-addr : none

VRF name: mgmt

Source IP for traceroute client:
  Configured: loopback2
  Current   : loopback2
  IPv4-addr : 10.10.10.10
  IPv6-addr : none
Related Commands
Notes

show ssh client source-interface 


show ssh client [vrf {<vrf-name>|all}] source-interface

Displays the SSH client source interface.

Syntax Descriptionvrf-nameDescribes VRF that will be affected by this command. If "vrf" parameter is not specified, the "default" VRF will be used implicitly.
DefaultN/A
Configuration ModeAny configuration mode
History3.7.1002
3.7.1100Updated example
3.9.2000Added VRF option
Example
switch (config)# show ssh client source-interface
Source IP for ssh client:
Configured: loopback1
Current : loopback1
IPv4-addr : 1.1.1.1
IPv6-addr : none

switch (config)# show ssh client vrf all source-interface

VRF name: default

Source IP for ssh client:
  Configured: none
  Current   : none
  IPv4-addr : none
  IPv6-addr : none

VRF name: mgmt

Source IP for ssh client:
  Configured: loopback2
  Current   : loopback2
  IPv4-addr : 10.10.10.10
  IPv6-addr : none
Related Commands
Notes

show ip scp source-interface 


show ip scp [vrf {<vrf-name>|all}] source-interface

Displays the source interface.

Syntax Descriptionvrf-nameDescribes VRF that will be affected by this command. If "vrf" parameter is not specified, the "default" VRF will be used implicitly.
DefaultN/A
Configuration ModeAny configuration mode
History3.7.1002
3.9.2000Added VRF option.
Example
switch (config)# show ip scp source-interface
Source IP for scp client:
Configured: none
Current : none
IPv4-addr : none
IPv6-addr : none

switch (config)# show ip scp vrf all source-interface

VRF name: default

Source IP for scp client:
  Configured: none
  Current   : none
  IPv4-addr : none
  IPv6-addr : none

VRF name: mgmt

Source IP for scp client:
  Configured: loopback2
  Current   : loopback2
  IPv4-addr : 10.10.10.10
  IPv6-addr : none
Related Commands
Notes

show ip sftp source-interface 


show ip sftp [vrf {<vrf-name>|all}] source-interface

Displays the source interface.

Syntax Descriptionvrf-nameDescribes VRF that will be affected by this command. If "vrf" parameter is not specified, the "default" VRF will be used implicitly.
DefaultN/A
Configuration ModeAny configuration mode
History3.7.1002
3.9.2000Added VRF option
Example
switch (config)# show ip sftp source-interface
Source IP for sftp client:
Configured: none
Current : none
IPv4-addr : none
IPv6-addr : none


switch (config)# show ip sftp vrf all source-interface

VRF name: default

Source IP for sftp client:
  Configured: none
  Current   : none
  IPv4-addr : none
  IPv6-addr : none

VRF name: mgmt

Source IP for sftp client:
  Configured: loopback2
  Current   : loopback2
  IPv4-addr : 10.10.10.10
  IPv6-addr : none
Related Commands
Notes

show snmp source-interface


show snmp [vrf {<vrf-name>|all}] source-interface

Displays the source interface for sending SNMP traps and informs.

Syntax Descriptionvrf-nameDescribes VRF that will be affected by this command. If "vrf" parameter is not specified, the "default" VRF will be used implicitly.

Default

N/A
Configuration Modeconfig
History3.8.1000
3.9.2000Added VRF option
Example
switch (config)# show snmp source-interface
Source IP for snmp server:

Configured: loopback7
Current : loopback7
IPv4-addr : 5.5.5.5
IPv6-addr : none

switch (config)# show snmp vrf all source-interface

VRF name: default

Source IP for snmp server:
  Configured: none
  Current   : none
  IPv4-addr : none
  IPv6-addr : none

VRF name: mgmt

Source IP for snmp server:
  Configured: loopback2
  Current   : loopback2
  IPv4-addr : 10.10.10.10
  IPv6-addr : none
Related Commandssnmp-server source-interface <interface>
Notes