Monitoring BGP peers?

Question

Cisco

Greetings.
We have our own AS, connected to 4 different operators, BGP, we get full view from each. The ASR 1002-X is used as a border. Behind it is a public service with rather high accessibility requirements. Periodically, one of the operators of such a plan has problems - traffic on part of the received routes is lost on the operator's network or behind it. Now this is very poorly diagnosed - as a rule, until requests from customers about the unavailability of the service begin to go. We find out which of the peers is messing up, turn off peering with it - traffic starts to go through other peers, at this time we deal with the operator's TP. Can this process be improved somehow? Ideally, the piece of iron itself would transfer traffic to other operators in case of problems. Or monitoring and manual switching.
There was an idea to set up periodic pings of different resources (ip sla monitor) located in the networks of our operators, with the source interface looking at the operator. But it happens that traffic is lost at the border of the operator with higher operators.
Maybe somehow PFR can be used for these purposes?

Answer 1

to be honest, a rather rare occurrence, at one time I had several bgp peers, have you tried to somehow permanently solve the problem with the operator? and say to abandon the problematic operator?

Answer 2

In two years, the problem manifested itself in three out of four operators. I would like a universal solution.

Answer 3

The problem is multifaceted; in case of loss of synchronization / violation of update-intervals, it makes sense to implement an analog of a reflector. Did I understand correctly that some of the routes on the problem feast work? If there is some problematic remote subnet, you can play around with an analogue of this option or another implementation of the reverse route. It will be interesting if a solution is announced that is implemented by the features of the router, and not by a service on a platform with a separate operating system.