I have a Cisco 1811 at a SOHO office. It has 2 router ports and 8 switch ports. Currently one of its 2 router ports is connecting with an ADSL ISP and another one is disabled. A GRE/IPSEC VPN is setup on this Internet connection to the Head Office.
I want to increase the bandwidth between HO and SOHO. It's too expensive to change the existing ADSL to a fiber or wireless high speed. So I want to introduce another ADSL line to another router port. Is that possible to setup another tunnel on the new ADSL and load balance the existing tunnel with the new tunnel? Thanks!