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Configuring IP Addressing
Configuring a Single Source IP Address
■ Configured IP Address—the specific IP address that is used as the source
IP address. This address is configured on one of the switch’s IP interfaces,
either a VLAN interface or a Loopback interface.
■ Configured IP Interface—the IP address from the specific IP interface
(VLAN or Loopback) is used as the source IP address. If there are multiple
IP addresses assigned (multinetting, for example), the lowest IP address
is used.
If the selection policy cannot be executed because the interface does not have
an IP address configured, does not exist, or is down, the application protocol
uses the default Outgoing Interface policy. A warning message is displayed,
but the configuration changes are accepted. When using the show ip source-
interface status command to display information about the source IP address
selection policy, the administratively-assigned source IP selection policy and
the actual (operational) source IP selection policy in effect are displayed. The
operational source IP selection policy may be different from the assigned
source selection policy if the IP interface does not exist or is down. In this
case, the default of Outgoing Interface appears as the operational policy (See
figure 8-13).
ProCurve (config)# show ip source-interface detail
Source-IP Detailed Information
Protocol : Tacacs
Admin Policy
Oper Policy
Source IP Interface
Source IP Address
Source Interface State : Down
: Configured IP Interface
: Outgoing Interface
: Vlan 22
: 10.10.10.4
The Admin Policy differs from the Oper
Policy because the Source Interface
State is Down. The default Outgoing
Interface policy is actually in effect.
Figure 8-13. Example of the Administratively-assigned Source IP Selection Policy Differing From the
Operational Policy
The no form of the ip source-interface command reverts the application proto-
cols to the default behavior. The Outgoing Interface policy is used.
Figure 8-14 is an example of assigning a specific source IP address for a
RADIUS application. The administrative policy is Configured IP Address.
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