Routing

We are preparing to get connectivity into a carrier hotel and we are wanting as much traffic as we can send to go through that connection, but day one we will only have a 10GB connection. We are taking full BGP tables from the carrier hotel and our current primary DIA provider and so the carrier hotel will be the preferred path for all routes we receive there as it will be the shortest ASN path. I have not done any traffic engineering or load balancing before so I am at a loss for where to start and I am solely responsible for making this happen.

Is there a way for us to route all traffic to the carrier hotel until that interface reaches say 9GB utilization and then route to a "less preferred" path until utilization drops below a certain point?

Hi,

Well, you could choose preferred path based on higher localpref that you set within import policy from primary path.

Also, there is fairly new feature called "BGP bandwidth community", but it needs to be supported by both your hardware and ISP.

https://community.juniper.net/blogs/moshiko-nayman/2024/05/13/bgp-link-bandwidth-with-junos