VPN and Winbox disconnects

Products ePMP
1

Found an issue with 4.4.3 and latest beta.
When CPE is in NAT mode traffic will seem to flow like normal BUT winbox / vpn connections will constantly fail and reconnect from BEHIND the CPE. I have enabled and disabled many of the settings and nothing seems to fix the issue BUT putting the CPE in bridge mode. Network is running OSPF/MPLS/VPLS.

This issue is on 2000 and 3000L AP's and CPEs models.
I have not rolled back to see when the issue stops on ePMP 2000 models.

2

The same behavior exhibits itself for customers running RDP sessions to a remote host behind a force 300 in nat mode.  The only solution is to bridge the CPE.  I've had a number of customers complain about this.

3

Hi,

Do you happen to have separate management interface VLAN with DHCP?

Thanks,

Dmitry

4

Dmitry,

Negative.

Public IP address to the CPE and then the CPE acts as NAT and DHCP no vlans for Data or Management.

5

Do you know if the issue correlates with DHCP client getting new lease after DHCP lease timeout?

Dmitry

6

Dmitry,

Lease time is 24hrs and this is constant disconnects within seconds of each other.

7

I too am not using a secondary management address on a different vlan.  If the radio is in nat mode it simply pulls an address via dhcp from the tower.

When the radios are in bridge mode we use a management vlan, but no data vlan.

The session drops do not seem to correlate with dhcp renewals, they aren't at any specific interval.

8

@dmitry does is there any way we can assit in helping Cambium with this issue? I would like to upgrade to 4.4.X but dont want to take every CPE out of NAT mode.

9

Hi,

It will be great to get remote access with the reproduce. Can you please shoot me an email at dmitry.moiseev@cambiumnetworks.com?

Thanks,

Dmitry