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Cisco ASA Series CLI Configuration Guide
Chapter 1 Configuring EIGRP
Customizing EIGRP
Customizing the EIGRP Hello Interval and Hold Time
The ASA periodically sends hello packets to discover neighbors and to learn when neighbors become
unreachable or inoperative. By default, hello packets are sent every 5 seconds.
The hello packet advertises the ASA hold time. The hold time indicates to EIGRP neighbors the length
of time the neighbor should consider the ASA reachable. If the neighbor does not receive a hello packet
within the advertised hold time, then the ASA is considered unreachable. By default, the advertised hold
time is 15 seconds (three times the hello interval).
Both the hello interval and the advertised hold time are configured on a per-interface basis. We
recommend setting the hold time to be at minimum three times the hello interval.
To configure the hello interval and advertised hold time, perform the following steps:
Detailed Steps
Step 3
Do one of the following to filter networks sent or received in EIGRP routing updates:
distribute-list acl out [connected | ospf
| rip | static | interface if_name]
Example:
hostname(config)# router eigrp 2
hostname(config-router)# network 10.0.0.0
255.0.0.0
hostname(config-router): distribute-list
acl out [connected]
Filters networks sent in EIGRP routing updates.
You can specify an interface to apply the filter to only those
updates that are sent by that specific interface.
You can enter multiple distribute-list commands in your EIGRP
router configuration.
distribute-list acl in [interface if_name]
Example:
hostname(config)# router eigrp 2
hostname(config-router)# network 10.0.0.0
255.0.0.0
hostname(config-router): distribute-list
acl in [interface interface1]
Filters networks received in EIGRP routing updates.
You can specify an interface to apply the filter to only those
updates that are received by that interface.
Command Purpose
Command Purpose
Step 1
interface phy_if
Example:
hostname(config)# interface inside
Enters interface configuration mode for the interface on which
you are configuring the hello interval or advertised hold time.
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