Medianet Reference Guide - Cisco

Auto Smartports
Chapter 7
Medianet Auto Configuration
Finally, as with the previous method, there is no mechanism to validate the overridden ASP macro has
no errors or is the correct macro for the model of switch to which it will be automatically downloaded.
It is again recommended that the network administrator test any overridden macros— perhaps using a
non-production lab or backup switch—before making them available for automatic download in order to
avoid such errors.
Note
CiscoWorks LMS is targeted to add support for managing Auto Smartports macros in an upcoming
release. Future updates to this document may include details about LMS as it relates to ASP macros.
Macro-of-Last-Resort
As highlighted in Table 7-2, Enhanced ASP macros support a feature known as the macro-of-last-resort
(also referred to as the LAST_RESORT macro). The macro-of-last-resort is a built-in ASP macro which
is run if no other trigger event is seen and therefore no other ASP macro (built-in or user-defined) is run.
Without the use of the macro-of-last-resort, devices such as end-user PCs—which typically will not
trigger any ASP macros—may end up with a default switchport configuration, depending on whether the
custom macro has been overridden. This may not be the desired switchport configuration, particularly if
the network administrator uses a VLAN other than VLAN1 for the normal data VLAN. The custom
macro is discussed in Custom Macro.
Note
The use of a VLAN other than the default (VLAN 1) for the data VLAN is consistent with Cisco SAFE
security guidelines.
The built-in macro-of-last-resort is enabled on Catalyst switches which support Enhanced ASP macros
via the following global configuration command:
macro auto global control trigger last-resort
The macro-of-last-resort can also be enabled per interface with the following interface-level command:
macro auto control trigger last-resort
The only parameter which can be passed into the built-in ASP macro-of-last-resort is the access VLAN.
This can be passed using the following global switch configuration command:
macro auto execute CISCO_LAST_RESORT_EVENT built-in CISCO_LAST_RESORT_SMARTPORT
ACCESS_VLAN=
For example, in order to set the access VLAN to VLAN100 for the macro-of-last-resort, the network
administrator would configure the following global switch command:
macro auto execute CISCO_LAST_RESORT_EVENT built-in CISCO_LAST_RESORT_SMARTPORT
ACCESS_VLAN=100
The example in Table 7-14 shows the switchport macro-of-last-resort configuration applied after a
link-up event for a Catalyst access switch. The configuration assumes the initial switchport configuration
was a default configuration (meaning no configuration on the interface).
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Medianet Reference Guide
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