21 Jul
2015
21 Jul
'15
1:23 p.m.
On Tue, Jul 21, 2015 at 11:18 AM, Brian Kantor <Brian(a)ucsd.edu> wrote:
Not really tricky... Just advertise the same address space from
multiple locations. The users of that address space would then need to
set up tunnels to ALL of the locations the address space is advertised
from. You could set it up so that the address space was only
advertised when the tunnel was operational.
For example, HamWAN advertises 44.24.240/20 from a handful of
locations. Each of those locations have tunnels to each other, so no
matter what location the inbound traffic comes in on, it is tunneled
to the appropriate internal address. If one of these edge routers goes
down, the address space stops getting advertised and inbound traffic
starts going to the other locations instead. This is a pretty vanilla
use of BGP.
Tom KD7LXL
Wouldn't
that also provide for fail-over redundancy? If the region or
home gateway went down - the other would keep traffic flowing.
I believe Tom is speaking of dividing up the address space among several
routers, which would require some tricky route advertisement to provide
any kind of redundancy.
- Brian