User manual

The steps in this section show a basic configuration. For detailed configuration information,

refer to Configuring WAN Failover with Network Monitor in AOS

available from the

ADTRAN support community at https://supportforums.adtran.com.

Configuring the ADTRAN Router ADTRAN Routers with CradlePoint CBA750B

To configure network monitor for wireless WAN failover, follow these steps:

• Step 1: Configure the Primary WAN Probe on page 10

• Step 2: Configure the Primary WAN Track on page 10

• Step 3: Configure Policy-based Routing for the Probe on page 11

• Step 4: Associate the Track with the Primary WAN Route on page 11

• Step 5: Disable the Reverse Path Forwarding Check on page 12

Step 1:

Configure the Primary WAN Probe

Create a primary WAN probe to send Internet Control Message Protocol (ICMP) echo request to detect

whether the primary WAN connection is UP or DOWN.

In the configuration example below, the probe <name> icmp-echo command is used to create an ICMP

echo probe. The destination command is used to configure the destination IP address for the ICMP echo

request sent by the probe, and the source command is used to specify the primary WAN IP address as the

source IP address of the ICMP echo requests. The period command is used to specify the frequency at

which the probe will send ICMP echo request, and the timeout command is used to specify how long the

probe will wait for an ICMP echo reply from the destination IP address before considering the ICMP echo

test a failure. Lastly, the tolerance consecutive command is used to specify the consecutive number of

times the probe’s test must fail or pass in order for the probe to transition from a PASS to FAIL state or

FAIL to PASS state, respectively. This command effectively determines when the probe considers the

primary WAN to be DOWN or UP.

To configure the ICMP echo probe for the primary WAN, enter the following commands at the specified

command prompts:

(config)#probe PRIMARYPROBE icmp-echo

(config-probe-PRIMARYPROBE)#destination 4.2.2.2

(config-probe-PRIMARYPROBE)#source-address 198.51.100.1

(config-probe-PRIMARYPROBE)#period 10

(config-probe-PRIMARYPROBE)#timeout 1500

(config-probe-PRIMARYPROBE)#tolerance consecutive fail 3 pass 2

(config-probe-PRIMARYPROBE)#no shutdown

Step 2: Configure the Primary WAN Track

Configure a track that monitors the status of the primary WAN probe and FAILs when the probe transitions

to the FAIL state (e.g. when the primary WAN fails).

In the configuration example below, the track command is used to create a track. The test list or command

is used to create a Boolean test list. The or keyword causes the track to be in the PASS state when the

PRIMARYPROBE probe (primary WAN) is in the PASS state and causes the track to be in the FAIL state

when the PRIMARYPROBE probe is in the FAIL state. Finally, the if probe command is used to specify

that the track’s state should be dependent on the state of the PRIMARYPROBE probe.