Network Internal Loop

Fnlz Posts: 5
First Anniversary Friend Collector First Comment
edited April 2021 in Security

Hello Guys,

I hope someone can help me with my Problem.

A customer of us got a new connection with SIP-Trunking. Everything is working fine till we connect the Lancom to the Switch, like shown above. It is needed for the telephone system to communicate.

As soon as we connect it, the Internet goes down and enters some kind of loop.

Is it possible that the WAN Port in our Zyxel is missconfigured?

If yes, is there a sample-conf to setup the WAN Port for Ethernet?


Accepted Solution

  • mMontana
    mMontana Posts: 1,342  Guru Member
    First Anniversary 10 Comments Friend Collector First Answer
    edited September 2019 Answer ✓

    Can you change the Lancom 883+ subnet (and accordingly, USG115 Wan Port subnet)?

    Try to use something different just like subnet.

    Long story short: use the same subnet on two different interfaces (not ports) AFAIK is not possible.

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