Cisco Systems Enabling EIGRP Authentication on an Interface

30-10
Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter30 Configuring EIGRP
Customizing EIGRP
Step4 Click OK.
Enabling EIGRP Authentication on an Interface
EIGRP route authentication provides MD5 authentication of routing updates from the EIGRP routing
protocol. The MD5 keyed digest in each EIGRP packet prevents the introduction of unauthorized or false
routing messages from unapproved sources.
EIGRP route authentication is configured on a per-interface basis. All EIGRP neighbors on interfaces
configured for EIGRP message authentication must be configured with the same authentication mode
and key for adjacencies to be established.
Note Before you can enable EIGRP route authentication, you must enable EIGRP.
To enable EIGRP authentication on an interface, perform the following steps:
Step1 In the main ASDM window, choose Configuration > Device Setup > Routing > EIGRP > Setup.
The EIGRP Setup pane appears.
Step2 Check the Enable EIGRP routing check box.
Step3 In the EIGRP Process field, enter the autonomous system (AS) number for the EIGRP process. The AS
number can range from 1 to 65535.
Step4 Click the Networks tab.
Step5 Click Add to add a new network entry.
The Add EIGRP Network dialog box appears. To remove a network entry, choose the entry in the table
and click Delete.
Step6 Choose the AS number of the EIGRP routing process from the drop-down list.
Step7 In the IP Address field, enter the IP address of the networks to participate in the EIGRP routing process.
Note To change a network entry, you must first remove the entry and then add a new one. You cannot
edit existing entries.
Step8 In the Network Mask field, choose or enter a network mask to apply to the IP address.
Step9 Click OK.
Step10 Choose Configuration > Device Setup > Routing > EIGRP > Interfaces.
The Interface pane displays the EIGRP interface configurations. The Interface Parameters table displays
all of the interfaces on the ASA and lets you modify the settings on a per-interface basis. For more
information about these settings, see the “Configuring Interfaces for EIGRP” section on page30-7.
Step11 Check the Enable MD5 Authentication check box to enable MD5 authentication of EIGRP process
messages. After you check this check box, provide one of the following:
•In the Key field, enter the key to authenticate EIGRP updates. The key can include up to 16
characters.
•In the Key ID field, enter the key identification value. Valid values range from 1 to 255.