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Model: RUT950

Firmware: RUT9XX_R_00.06.08.3

We use the RUT950 routers to establish L2TP VPN to our LNS. In the L2TP config, I enable the Default Route option and I can see that a route is added to the routing table. I have used this setup on approximately 200 RUT950 routers and it works flawlessly, however it is not working on a newly ordered batch of routers. The new routers establish the L2TP VPN, however they are unreachable from our LNS, and I see that they add multiple default routes to their routing table which makes me think that there may be asymmetric routing. For comparison, please see the following:

Working router firmware: RUT9XX_R_00.06.07.7

Working router routing table:

root@Teltonika-RUT950:~# ip route                                                                       

default via lns.touchnet.co.za dev l2tp-TNT  proto static                                                   

10.0.2.240/28 dev br-lan  proto kernel  scope link  src 10.0.2.241                                      

100.116.112.40/30 dev wwan0  proto kernel  scope link  src 100.116.112.42                               

lns.touchnet.co.za via 100.116.112.41 dev wwan0  proto static                                               

lns.touchnet.co.za dev l2tp-TNT  proto kernel  scope link  src 172.16.13.198

Not working router firmware: RUT9XX_R_00.06.08.3

Not working router routing table:

root@Teltonika-RUT950:~# ip route                                                                       

default via lns.touchnet.co.za dev l2tp-TNT  proto static                                                   

default dev wwan0  proto static  scope link  src 172.28.18.225  metric 10                               

10.0.43.144/28 dev br-lan  proto kernel  scope link  src 10.0.43.145                                    

lns.touchnet.co.za dev l2tp-TNT  proto kernel  scope link  src 172.16.23.246                                

lns.touchnet.co.za dev wwan0  proto static  scope link  metric 10                                           

172.28.18.225 dev wwan0  proto static  scope link  metric 10            

The configuration settings between the working router and the not working router are identical. Please let me know if you need more info and I'll be happy to oblige.

Regards

Peter

1 Answer

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Hello,

Have you tried our RUT9_R_00.07.00 firmware version? Does the routing apply correctly with it?

Regards.
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Hi there, thank you for responding

It turned out to be an issue with our RADIUS server not injecting routes correctly into the customer VRF.

There was no issue with the Teltonika router. I'll mark this question as answered.