My company is providing IT services (internet service, WiFi, IPTV, ...etc) to hotels. More and more of our clients ask us about this Multi-homing ISP redundancy solution. I am building a test enviroment and I have found 2 ISPs and I will try this out.
I just want to know how it works between two ISPs. So my router, which has two connections to two different ISPs, will advertise my IP block to them through BGP. I will configure my router (1841) to only accept default route. So for the outgoing traffic, my router should be able to evenly distribute traffics on these two ISPs. However what about incoming traffic? Will they always take the primary link or they can be evenly distributed as well?
Another question is regarding to the AS. The primary ISP asked me to apply for an AS number and they told us that we can use this AS number for other hotels (we have hotels all over in North America and they will very likely use different ISPs). Can we use the same AS number for different hotels in different states or even countries? We don't own any public IP blocks. We will need get individual IP block from each primary ISP for each hotel. Will this cause any problems or we need to apply for individual AS for each hotel?