real world BGP issue
I have a scenario at work, that i am trying to think through.
Being a service provider network, we peer with commercial peers like google (direct peering, one hop away), L3, akamai etc.
We also have peering with academic research networks. These routes are non commercial routes.
Our clients, when they form bgp peering with us, they receive both commercial and non commercial routes from us.
One of our client complained recently, that they do not wish to see commercial routes coming into them through us. As we tag commercial and non commercial routes with community vlaues, we just advised them of the tag for the commercial routes and they have now taken care of the requirement by filtering our those routes (not sure if they used prefix list or changed local preference value). This happened around mid march.
Some of our other clients are complaining that thier link connecting them to our AS is barely busy, there is hardly any traffic traversing that link (for commercial and non commercial destinations alike). This has been on going since mid march. They have another interconnect with another service provider, and they see that link being extra busy.
This is becoming a reqular occurance now. Please suggest as to why it may be happening. We have not changed anything at our end. I am not sure if the client/clients have made any changes on thier side. How do I troubleshoot this issue.