Cisco ASA 5505 - Manual (Page 236)

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Cisco ASA 5500 Series Configuration Guide using the CLI
Chapter 5 Configuring Multiple Context Mode
Monitoring Security Contexts
Viewing MAC Addresses in the System Configuration
This section describes how to view MAC addresses in the system configuration.
Guidelines
If you manually assign a MAC address to an interface, but also have auto-generation enabled, the
auto-generated address continues to show in the configuration even though the manual MAC address is
the one that is in use. If you later remove the manual MAC address, the auto-generated one shown will
be used.
Detailed Steps
Examples
The following output from the show running-config all context admin command shows the primary
and standby MAC address assigned to the Management0/0 interface:
hostname# show running-config all context admin
context admin
allocate-interface Management0/0
mac-address auto Management0/0 a24d.0000.1440 a24d.0000.1441
config-url disk0:/admin.cfg
The following output from the show running-config all context command shows all the MAC addresses
(primary and standby) for all context interfaces. Note that because the GigabitEthernet0/0 and
GigabitEthernet0/1 main interfaces are not configured with a nameif command inside the contexts, no
MAC addresses have been generated for them.
hostname# show running-config all context
admin-context admin
context admin
allocate-interface Management0/0
mac-address auto Management0/0 a2d2.0400.125a a2d2.0400.125b
config-url disk0:/admin.cfg
!
context CTX1
allocate-interface GigabitEthernet0/0
allocate-interface GigabitEthernet0/0.1-GigabitEthernet0/0.5
mac-address auto GigabitEthernet0/0.1 a2d2.0400.11bc a2d2.0400.11bd
mac-address auto GigabitEthernet0/0.2 a2d2.0400.11c0 a2d2.0400.11c1
mac-address auto GigabitEthernet0/0.3 a2d2.0400.11c4 a2d2.0400.11c5
mac-address auto GigabitEthernet0/0.4 a2d2.0400.11c8 a2d2.0400.11c9
Command Purpose
show running-config all context [name] Shows the assigned MAC addresses from the system execution space.
The all option is required to view the assigned MAC addresses. Although
this command is user-configurable in global configuration mode only, the
mac-address auto command appears as a read-only entry in the
configuration for each context along with the assigned MAC address. Only
allocated interfaces that are configured with a nameif command within the
context have a MAC address assigned.