How can I get to know that which Isp's Backhaul my local isp provider is using and how do i Get to know which Isp's are in my upstream and downstream?
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How to check my Local Isp's Upstrem Provider?
- Thread starter Gaurav_add
- Start date
- Replies 5
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BGP
Use ipinfo.io to get your public ASN
Use bgp.he.net to see BGP Peers
Use bgp.he.net to see BGP Peers
How to differentiate which Isp is to my upstream and which to my Downstream?
I don't think there is a strictly a concept like upstream or downstream here. There are just peers.
Typically I would categorize based on the route it takes to reach a specific destination. For example to reach x.y.z.w from a ASN, all the peers in the middle are upstream from source ASN.
In most cases, The "upstream" peer will happen to be equal or a larger ASN and downstream will be smaller or equal ASN(in terms of announced prefixes, peers etc)
In case of AS45942, It has Airtel, Tata, Unitas as upstreams. They are much larger ASNs and a good chunk of internet is accessible in AS45942 via these 3 peers.
Rest are probably just downstream or equal peers.
For a specific endpoint, You'll have to dig into how the traffic is routed via their peers.
Typically I would categorize based on the route it takes to reach a specific destination. For example to reach x.y.z.w from a ASN, all the peers in the middle are upstream from source ASN.
In most cases, The "upstream" peer will happen to be equal or a larger ASN and downstream will be smaller or equal ASN(in terms of announced prefixes, peers etc)
In case of AS45942, It has Airtel, Tata, Unitas as upstreams. They are much larger ASNs and a good chunk of internet is accessible in AS45942 via these 3 peers.
Rest are probably just downstream or equal peers.
For a specific endpoint, You'll have to dig into how the traffic is routed via their peers.
Last edited:
@ishanjain28 Thanks for helping me out.