Automatically Assigning Mac Addresses To Context Interfaces - Cisco ASA 5505 Configuration Manual

Chapter 6 Configuring Multiple Context Mode
You can add or edit a resource class directly from this area. See the
Management" section on page 6-15
Step 12 To set the context configuration location, identify the URL by choosing a file system type from the
Config URL drop-down list and entering a path in the field.
For example, the combined URL for FTP has the following format:
ftp://server.example.com/configs/admin.cfg
Step 13 (Optional) For external filesystems, set the username and password by clicking Login.
(Optional) To set the failover group for active/active failover, choose the group name in the Failover
Group drop-down list.
Step 14 (Optional) Add a description in the Description field.

Automatically Assigning MAC Addresses to Context Interfaces

This section describes how to configure auto-generation of MAC addresses. The MAC address is used
to classify packets within a context. See the
for more information. See also the
Guidelines
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•
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Detailed Steps
If you are not already in the System configuration mode, in the Device List pane, double-click System
Step 1
under the active device IP address.
Choose the Configuration > Context Management > Security Contexts pane, and check
Step 2
Mac-Address auto.
Check the Prefix check box, and in the field, enter a a decimal value between 0 and 65535.
Step 3
OL-20339-01
When you configure a name for the interface in a context, the new MAC address is generated
immediately. If you enable this feature after you configure context interfaces, then MAC addresses
are generated for all interfaces immediately after you enable it. If you disable this feature, the MAC
address for each interface reverts to the default MAC address. For example, subinterfaces of
GigabitEthernet 0/1 revert to using the MAC address of GigabitEthernet 0/1.
For the MAC address generation method when not using a prefix (not recommended), see the
mac-address auto command in the Cisco ASA 5500 Series Command Reference.
In the rare circumstance that the generated MAC address conflicts with another private MAC
address in your network, you can manually set the MAC address for the interface within the context.
See the "Configuring Advanced Interface Parameters" section on page 8-26
MAC address.
for more information.
"Information About MAC Addresses" section on page 6-11
"Viewing Assigned MAC Addresses" section on page
Cisco ASA 5500 Series Configuration Guide using ASDM
Configuring Multiple Contexts
"Configuring a Class for Resource
6-21.
to manually set the
6-19