Manual

Swisscom

Fibre with DHCP over VLAN 11. IPv6, TV and telephony are deliberately left out of the preset.

This preset is for a Swisscom fibre line where you replace the Internet-Box with a MikroTik. Internet arrives by DHCP, tagged on VLAN 11. There are no credentials. The VLAN number is the whole difference: without the tag no address arrives and it looks as if nothing is plugged in.

What the preset fills in

Pick Swisscom from the provider list at the top of the WAN / internet section:

  • Type DHCP.
  • VLAN id on the WAN port set to 11. The configurator creates a VLAN interface, something like ether1-vlan11, and puts the DHCP client on it.
  • The MTU field is cleared.
  • A comment Swisscom on the uplink.

And nothing else. This preset does not turn IPv6 on and does not change your IPv6 settings, with one exception: if IPv6 is already on, its WAN interface is pointed at the new uplink so it does not stay on the old port.

IPv6

We fill in no prefix length for Swisscom because we are not certain which method your line uses. So look it up or ask, and then set it yourself in IPv6: the method (prefix delegation is the ordinary case) and the requested prefix length, which defaults to /56. While you are there, check that the WAN interface for DHCPv6 is the VLAN interface and not the bare port.

If you do not want IPv6, turn it off deliberately rather than leaving it half on. Half working IPv6 is harder to track down than none at all.

Television and telephony

blue TV and telephony are not in this preset. We also do not state here how Swisscom delivers them, because we do not know for certain. If you want to keep them, ask Swisscom what they need: a VLAN of their own, a separate port, or an Internet-Box that stays in place for that part.

If TV turns out to arrive as multicast over your connection, turn IPTV on in the WAN section. The router then acts as an IGMP proxy, and you turn on IGMP snooping on the bridge so the stream is not flooded to every port. If it has a VLAN of its own, add that as a second uplink and select it under IPTV. See Recipe: IPTV.

What you still do yourself

The WAN port. The preset leaves the port that was already set and otherwise takes your model's default WAN port. That is where the cable from the wall socket goes.

The rest of your network. LAN address, Wi-Fi, the VLANs inside your network, firewall and admin password stay yours. The VLAN on the WAN port has nothing to do with your own VLANs.

A fixed address. If your subscription includes a fixed address or block, set the type to Static IP address and fill in the address, gateway and the provider's DNS. The VLAN number stays where it is. Ask Swisscom for the details.

Checking that it works

  1. /interface vlan print shows a VLAN interface with id 11 on your WAN port.
  2. /ip dhcp-client print should read bound on that VLAN interface, not on the bare port.
  3. /ip address print and /ip route print show your address and the default route.
  4. If you set IPv6 up yourself: /ipv6 dhcp-client print shows whether you got a prefix.

What usually goes wrong

  • No VLAN 11. The DHCP client then sits on the bare port and keeps searching.
  • The old Internet-Box is still in the chain. You are then behind two routers and port forwarding does not work. See Moving off a provider router.
  • IPv6 stays off. That is not a fault: this preset does not turn it on. Set it up yourself.
  • TV stopped working. It was never included: the preset does not cover it.

If you know how it works

If you have your Swisscom line running, IPv6 or TV included, tell us through the feedback form. Then we can make the preset more complete instead of everyone working it out again.

Read on: Provider presets, WAN and internet and IPv6.

Want to try it right away? Open the configurator