Configuration problems LAN - FritzBox Fon WLAN 7320

I have FritzBox Fon WLAN 7320 (2xLAN, 1xDSL, Fon-in, Fon-out)
and updated the box via FTP: openwrt-18.06.2-lantiq-xway-avm_fritz7320-squashfs-sysupgrade.bin

current configuration
Network - Interface - LAN (br-lan [eth0,wlan0]) WAN, WAN6

It works: WLAN(wifi) with DHCP
That does not work: Port: LAN1(eth0), LAN2(eth1-non-existent), SIP-Client

Connect to Router with wlan OK and + ethernet-cable connect.
$ ssh root@
$ ip a
-> eth0 .... state UP

PC-LAN Fixed IP address with cable Box:LAN1
$ ping -> Destination Host Unreachable

A few questions,
How do I configure:

  1. LAN1(eth0) with DHCP ?
  2. LAN2(eth1) + DHCP?
    I have Internet via cable modem and would like to connect FritzBox. (Cable Modem -> Ethernet(TP)-> WAN-Port_FritzBox - FritzBox_LAN1 -> Ethernet_PC)
  3. Port DSL (WAN) for Ethernet?
  4. VoIP (SIP) client?

Thanks in advance

If you upgraded from another version, you may have to setup the device manually, copying/pasting relevant sections.

All device configs are not upgradeable between versions.