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Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter15 Completing Interface Configuration (Transparent Mode, 8.4 and Later)
Completing Interface Configuration in Transparent Mode (8.4 and Later)
Note For use with failover, you must set the IP address and standby address manually; DHCP is not
supported. Set the standby IP addresses on the Configuration > Device Management > High
Availability > Failover > Interfaces tab.
To set the IP address manually, click the Use Static IP radio button and enter the IP address and
mask.
To obtain an IP address from a DHCP server, click the Obtain Address via DHCP radio button.
a. To force a MAC address to be stored inside a DHCP request packet for option 61, click the Use
MAC Address radio button.
Some ISPs expect option 61 to be the interface MAC address. If the MAC address is not
included in the DHCP request packet, then an IP address will not be assigned.
b. To use a generated string for option 61, click Use
“Cisco-<MAC>-<interface_name>-<host>”.
c. (Optional) To obtain the default route from the DHCP server, check Obtain Default Route
Using DHCP.
d. (Optional) To set the broadcast flag to 1 in the DHCP packet header when the DHCP client sends
a discover requesting an IP address, check Enable DHCP Broadcast flag for DHCP request
and discover messages.
The DHCP server listens to this broadcast flag and broadcasts the reply packet if the flag is set
to 1.
e. (Optional) To renew the lease, click Renew DHCP Lease.
Step8 (Optional) In the Description field, enter a description for this interface.
The description can be up to 240 characters on a single line, without carriage returns.
Note (ASA 5510 and higher, single mode) For information about the Configure Hardware Properties
button, see the “Enabling the Physical Interface and Configuring Ethernet Parameters” section
on page 12-23.
Step9 Click OK.