VPN support for inserting Services Processing Cards

These high-end SRX Series devices have a chassis-based distributed processor architect-ure. The flow processing power is shared and is based on the number of Services Proces-sing Cards (SPCs). You can scale the processing power of the device by installing a new SPC. Previously, whenever you installed a new SPC on a device either in standalone mode or in chassis cluster mode, the distributed VPNs on the device were disrupted. This feature enables you to insert an SPC on a device, in a chassis cluster, without disrup-ting the traffic on the existing VPN tunnels created by the IKE and IPsec workload. Now when you insert a new SPC in each chassis of the cluster, the existing tunnels are not affected and traffic continues to flow over them without any disruption.