Graceful Restart (GR)is a feature that allows a router to maintain forwarding even when the routing process (e.g., the rpd process in Junos) is restarting, minimizing disruption to the network.
Step-by-Step Breakdown:
* Graceful Restart Function:During aGR event, the forwarding plane continues to forward packets based on existing routes, while the control plane (rpd process) is restarting. This prevents traffic loss and maintains routing stability.
* Minimizing Disruptions:GR is particularly useful in ensuring continuous packet forwarding during software upgrades or routing protocol process restarts.
Juniper Reference:
* Graceful Restart in Junos: GR ensures high availability by maintaining forwarding continuity during control plane restarts, enhancing network reliability.