Q&A: Is there a GRE tunnel traffic bandwidth limit?
Is there a GRE tunnel traffic bandwidth limit?
There is no specific bandwidth limit on the GRE tunnels. However, there is a 1 Gbps default rate-limit on our routers for traffic passing between our core and customer VRF, which is where customer GRE tunnels originate/terminate. This is designed to protect both our customers and our infrastructure in the event of a rapidly-increasing large DDoS attack (occurring before mitigation has been enabled). This can be adjusted by Silverline SOC depending on a customer's contracted bandwidth. SOC can also apply individual rate-limiters on specific GRE tunnels, if needed.