SIP Only one-Way in z3 Site2Site VPN after MX Upgrade from 84 to 95

[KSVSachsen]

Hi,

we have replaced our MX-84 HA Pair with two MX-95. everything works fine except the SIP Communictaion from the Cisco phones behind the Z3 Teleworker Site2Site VPNs that worked before. 

The SIP Audio  is only One-Way (outgoging from Z3 Phone to Internal).  We havent done any other changes. 

It is an IPv4 enviroment 

The NAT Setting for Site-2-Site VPN was Always Set to automatic  via Meraki Cloud.

Does someone have expirienced this or a similar Problem ?

with regards

Robert

[alemabrahao]

What version are you running?

[KSVSachsen]

All on 17.10 (MX84's and MX95's)

We switched back to the MX-84 Pair. 

Z3 VPN Auto-Nat seems to work  fine as Before. SIP Audio now two way. Again

[alemabrahao]

@KSVSachsen,

I suggest you downgrade to version 16.16.6, version 17.10.1 has been removed from the list of stable versions. This version was showing several bugs, mainly in performance.