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Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter 15 Completing Interface Configuration (TransparentMode, 8.4 and Later)
Completing Interface Configuration in Transparent Mode (8.4 and Later)
Note When you set the MTU for a redundant or port-channel interface, the ASA applies the setting to
all member interfaces.
• For models that support jumbo frames in single mode—If you enter a value for any interface that is
greater than 1500, then you enable jumbo frame support automatically for all interfaces. If you set
the MTU for all interfaces back to a value under 1500, then jumbo frame support is disabled.
• For models that support jumbo frames in multiple mode—If you enter a value for any interface that
is greater than 1500, then be sure to enable jumbo frame support in the system configuration. See
the “Enabling Jumbo Frame Support (Supported Models)” section on page 12-38.
Note Enabling or disabling jumbo frame support requires you to reload the ASA.
Step 5 To manually assign a MAC address to this interface, enter a MAC address in the Active Mac Address
field in H.H.H format, where H is a 16-bit hexadecimal digit.
For example, the MAC address 00-0C-F1-42-4C-DE would be entered as 000C.F142.4CDE. The first
two bytes of a manual MAC address cannot be A2 if you also want to use auto-generated MAC addresses.
Step 6 If you use failover, enter the standby MAC address in the Standby Mac Address field. If the active unit
fails over and the standby unit becomes active, the new active unit starts using the active MAC addresses
to minimize network disruption, while the old active unit uses the standby address.
What to Do Next
(Optional) Configure IPv6 addressing. See the “Configuring IPv6 Addressing” section on page 15-16.
Configuring IPv6 Addressing
This section describes how to configure IPv6 addressing. For more information about IPv6, see the
“Information About IPv6 Support” section on page 24-9 and the “IPv6 Addresses” section on page A-5.
This section includes the following topics:
• Information About IPv6, page 15-16
• Configuring a Global IPv6 Address and Other Options, page 15-18
• (Optional) Configuring the Link-Local Addresses Automatically, page 15-20
• (Optional) Configuring the Link-Local Addresses Manually, page 15-20
Information About IPv6
This section includes information about how to configure IPv6, and includes the following topics:
• IPv6 Addressing, page 15-17
• Duplicate Address Detection, page 15-17
• Modified EUI-64 Interface IDs, page 15-17
• Unsupported Commands, page 15-18