BGP AS# & Public IP assignment query for Gurus..:-)
Hello BGP gurus,
need some clarification on BGP AS# & Public IP space assignments...
If Ripe assigns me a public ip block of 22.214.171.124-126.96.36.199(188.8.131.52/20), then..
1.Can I use individual subnets (184.108.40.206/24, 220.127.116.11/24 etc..) any where in the world as long as my ISP at that place is advertising them..?
2. Also, at those places, incase if I want to advertise my individual subnet via ISP BGP peering, (use BGP for redundancy, load balance via 2ISPs) do I have to request for seperate AS# at each location ..?
3.If I know a AS#, how do I find out, to whom that AS# is assigned to.
4. When RIPE assigns public block, will it also assign AS# or it need to be seperately requested...?
Re: BGP AS# & Public IP assignment query for Gurus..:-)
1. Yes you can. You can even advertise an aggregated 18.104.22.168/20 using your own AS# and advertise 22.214.171.124/24 using another AS# (or your ISP AS#) in other part of the world. Because the more specific route still applies.
2. No need, you can advertised them using Private AS#, you just have to talk to your ISP to agree what Private AS# to use.
3. You can check from IANA or use the NICs WHOIS. ARIN, RIPE-NCC, APNIC, AFRINIC, LACNIC.
4. AFAIK they are seperate. The justification for both are different. Read their policy on IP Address block and AS# allocation.
[EDIT] Before you chop-chop your IP Address netblock, check with your upstream ISP (directly connected) the minimum number of netblocks they allow. Some ISP may allow /24 but some may not allow it.
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