Hi Alex,
Am 03.08.2012 00:11, schrieb Alex Balashov:
- Give only a single IP address to all customers and termination
providers (the same IP address), 195.5.5.5.
That would be difficult, unless you really have your anycast ducks in a row. A more common way to approach this problem is SRV records, though not all SIP endpoints out there implement SRV correctly or make use of it in the manner contemplated by a redundancy-oriented use of them.
I think I'll be fine if I prepend my ASN several times at one location (Spain or France). I will probably still get some tiny traffic from the direct upstream and maybe its customers, if they have configured it this way, but the traffic that is originating from my IPs at this location will also get routed via the direct upstream, so everything should be in order. Therefore that location will act as backup only (except the constant tiny traffic that it will probably receive).
I'll cut the rest of your answers as I have nothing to add. Just wanted to say a big thank you for the detailed answers! That helped.
Regards Markus