Community discussions

MikroTik App
 
User avatar
honeyfairy
just joined
Topic Author
Posts: 13
Joined: Sat Nov 21, 2020 1:25 am
Contact:

Is it possible to use one of our assigned Public IPs on external router connected to another ISP?

Sat Jan 23, 2021 12:04 am

We have a block of addresses that has been assigned to us by Afrinic (RIR for this region)
We are announcing this IP block via an eBGP session with Vultr (making use of this service: https://www.vultr.com/features/bgp/)

Now, could we route, direct or point one of our public ip addresses to a router that is not connected to the Vultr cloud?

So Ideally, if we could advertise it like this to the world:
To reach 122.122.122.100 go via: 224.224.224.1
To reach 122.122.122.200 go via: 45.11.11.11.33
Is this possible?

See diagram for clarity:
ebgp.png
You do not have the required permissions to view the files attached to this post.
 
User avatar
CZFan
Forum Guru
Forum Guru
Posts: 1977
Joined: Sun Oct 09, 2016 8:25 pm
Location: South Africa, Krugersdorp (Home town of Brad Binder)
Contact:

Re: Is it possible to use one of our assigned Public IPs on external router connected to another ISP?

Sat Jan 23, 2021 1:00 am

Yes, you can route it further into your network
MTCNA, MTCTCE, MTCRE & MTCINE
 
User avatar
jvanhambelgium
Member
Member
Posts: 393
Joined: Thu Jul 14, 2016 9:29 pm
Location: Belgium

Re: Is it possible to use one of our assigned Public IPs on external router connected to another ISP?

Sat Jan 23, 2021 1:20 pm

It all depends actually.
"this other ISP" might not be interested in playing TRANSIT for IP-space not belonging to them, OR you might have the make the correct commercial agreements and pay for this transit.
Now the IP space you received from Vultr is effectively part of their (larger) allocations with a RIR ? Or did you obtain PI (Provider Independent) space from the RIR ?
Technically there are certainly possibilities depending on the agreements you have.
 
User avatar
16again
Frequent Visitor
Frequent Visitor
Posts: 82
Joined: Fri Dec 29, 2017 12:23 pm

Re: Is it possible to use one of our assigned Public IPs on external router connected to another ISP?

Sat Jan 23, 2021 7:22 pm

If routers aren't directly connected, it won't work. They are unaware of your eBGP session, and a single /32 isn't advertised to them
To be able to use your IP address elsewhere, encapsulate this IP in GRE tunnel between vultr and your on prem CCR

Who is online

Users browsing this forum: Baidu [Spider], nickrod50 and 255 guests