Help me understand the BGP protocol better

[florinmarian]

Hello, friends!
After about half a year ago you taught me to correctly configure a BGP session through which I announced my two subnets through the two ISPs I have at home, the time has come to complicate the architecture.

I want to stop the BGP announcement for one of the two subnets and announce it for a remote datacenter that has the BYOIP function.
I announced them which AS I will use, which subnet I will announce and I saw that the datacenter added my AS to their "AS-SET" group.
What will have to happen next besides the fact that I have to stop announcing that subnet through the first ISPs?
I haven't received any IP address from the datacenter and that's why I'm very confused.
Thank you!

[Ruben Cocheno]

@florinmarian 

What is the provider in question? This type of setup is common in  DDOS providers where you announce your Prefixes through a GRE tunnel with them for scrubbing.

Get back to the provider and ask for some guidance is the best option here...

[florinmarian]

Hey!
Thanks for the reply. I will end up with a complete setup myself, but I was curious what the possibilities are with this setup.
Wouldn't a GRE tunnel also mean an increase in latency? (Romania - Germany, round trip)? If so, what is the advantage of BGP?
I'm missing something and I'd love to know what it is

[Richard Burts]

I want to address several aspects of this recent post:

- "Wouldn't a GRE tunnel also mean an increase in latency" Yes the GRE tunnel would result in some increase in latency. Hard to say how much. I have had several customers who use a service like what Ruben describes. For every one of them the tradeoff of increased latency vs being confident that their traffic was better protected, was well worth it.

- "what is the advantage of BGP?" If you want to advertise something to the Internet then BGP is what you use. There is not another alternative for how to dynamically advertise addresses spaces to the Internet.