NextGen Port Extender (NGPE)
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NextGen Port Extender (MX10004, MX10008, and MX304)—The NextGen Port Extender is a solution for managing an aggregation network environment, in which a central aggregation device connects to multiple satellite devices. The interfaces on each satellite device become extensions of the aggregation device and the whole cluster appears, from a management perspective, as a single device. EVPN-VXLAN tunneling transports all traffic between aggregation and satellite devices. The MX10004 and MX10008 are supported only with MX10K-LC4800 or MX10K-LC9600 FPCs.
[See https://www.juniper.net/documentation/us/en/software/junos/ngpe/index.html.]
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VPLS support for NextGen Port Extender (MX304, MX10004, and MX10008)—Use the NextGen Port Extender to provision VPLS services on the extended ports of the satellite device. The MX304, MX10004, and MX10008 routers act as the aggregation device.