We have an OSPF Network, where I use an RB1100AH as my edge router

At the office we have 8 WAN ADSL Lines, and 2 LAN POrts for different sides of the network.

Just an question, if our network grows at the current rate, we will need to add more DSL lines to our network, and our RB1100AH only has 12 POrts, What can we then do to add more lines to the network?

Use VLANs.

Make contact with some ISP and buy fiber optic. How can you put yourself in position to have such amount of ADSL links for your business? Then in that situation all You need is router with 2 interfaces and one good L3 switch.

Where I live in South africa, there is no Fibre in an 600km Radius. I use mangle to mark different clients with different routing marks.

If I use Vlans how would I go about setting that up?

Is there a way to connect a secont RB1100AH to add more ports?

On the switch connect each adsl service to an access port each on their own vlan. Then Vlan trunk from switch to router.

Sent from my GT-I9100 using Tapatalk 2

So I put a normal 8 port switch between my routerboard that handles the PPPOE connection and the pysical adsl modem?

Then I setup an Vlan between the Routerboard and the adsl, each with their on VLAN TAG?

spot on.

example.

switch:
port1 - vlan 101 - mode access/untagged
port2 - vlan 102 - mode access/untagged
port3 - vlan 103 - mode access/untagged
port4 - vlan 104 - mode access/untagged
port5 - vlan 105 - mode access/untagged
port6 - vlan 106 - mode access/untagged
port7 - vlan 107 - mode access/untagged
port8 - vlan all - mode trunk/tagged

connect port8 to mikrotik ether1 and the others to you adsl services.

mikrotik:
/interface vlan then create the pppoe-client on the vlan interfaces for your adsl.