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Configuring IP Addressing
Configuring a Single Source IP Address
.
Syntax
:
[no] ip source-interface <radius | tacacs | logging | all> <loopback <id> |
vlan <vlan-id> address <ip-address>>
Determines the source IP address used by the specified
software application when transmitting IP packets. The all
parameter can be used to set one IP address for all the listed
applications, in this case, RADIUS, TACACS, and System
Logging.
The no version of the command cancels the configuration and
the application reverts to its default behavior. The system
determines the source IP address of outgoing application-
specific IP packets at packet transmission time.
loopback <id>: Specifies that the IP address of the loopback
interface is used as the source IP address in outgoing packets.
If the loopback interface has no IP address, then the
application reverts to the default behavior. If more than one IP
address is configured, then the lowest IP address is used.
vlan <vlan-id>: Specifies that the IP address of the indicated
VLAN interface is used as the source IP address of outgoing
packets. If the specified VLAN interface has no IP address
configured, or is down, then the application reverts to the
default behavior. If more than one IP address is configured,
then the lowest IP address is used.
address <ip-address>: Specifies the IP address that should be
used as the source IP address of outgoing packets. The IP
address must be a valid IP address configured on one of the
switch’s VLAN or loopback interfaces. If the interface is down,
then the application reverts to the default behavior.
The Source IP Selection Policy
The source IP address selection for the application protocols is defined
through assignment of one of the following policies:
■ Outgoing Interface—the IP address of the outgoing IP interface is used as
the source IP address. This is the default policy and the default behavior
of applications.
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