SpeedTouch 780WL alternative WAN

Connect to an alternative WAN connection using another modem. This will make it possible to select between using the internal modem or another modem connected on ethernet port 4 by creating an bridge with ethport4 and the atm_8_35 pvc

Create an Internet VLAN and move ethernet port 4 there:

:eth bridge config vlan enable
:eth vlan add name Internet vid 2
:eth bridge vlan ifadd name Internet intf ethport4
:eth bridge vlan ifdelete name default intf ethport4

Set up a new IP interface for the WAN side:

:eth bridge vlan ifadd name Internet intf OBC
:eth ifadd intf=eth_Internet dest bridge
:eth ifconfig intf=eth_Internet vlan Internet
:eth ifattach intf eth_Internet
:ip ifadd  intf Internet dest eth_Internet
:ip ipadd intf Internet addr xxx.xxx.xxx.xxx/24 addroute=enabled
:ip ifattach intf Internet
:ip rtadd dst=0.0.0.0/0 gateway=xxx.xxx.xxx.xxx (your ISP gateway)
:nat ifconfig intf=Internet translation=enabled

Move the DSL connection into the bridge:

Not etirely sure how I did this, but I think I deleted the old IP interface and old Ethernet interface first to free the atm pvc.

:eth bridge ifadd brname bridge intf adsl
:eth bridge ifconfig brname bridge intf adsl dest atm_8_35
:eth bridge ifattach brname bridge intf adsl
:eth bridge vlan ifadd name Internet intf adsl
:eth bridge vlan ifdelete name default intf adsl