Adtran 908e GEN3 in getting Spoofing messages when trying to access from outside the Adtran local network

Issue with Adtran 908e GEN3 in getting Spoofing messages when trying to access from outside the Adtran local network. 

This also prevented any access to the Adtran from outside the Adtran local network.

It appears that in the GEN3 we have to use “ip routing”. Adtran support said it will not work without it, even though we have been using the 908 GEN2 and 908e GEN2 Adtran without “ip routing”. So use it we will .

It is a very simple procedure. After you get the config loaded on the Adtran, which was generated with Sigma, make the following changes.

To turn on ip routing:

(config)#ip routing

Now set a default route:

ip route <ip address> <subnet mask> <interface>

Example: (config)#ip route 0.0.0.0 0.0.0.0 10.10.10.1

The example above is just that. You need to substitute 10.10.10.1 with your correct gateway route out.

That’s it. Now if your “ip access-list” and “ip policy-class” are correct, and correctly assigned to your Ethernet interface, you should have access to the Adtran from outside the Adtran local network.

This has been tested on 908 GEN2 A4.11.00. Also on 908e GEN2 using AOS A4.11,  and GEN3 using R10.9.4.