NextGen Port Extender Supported Features, Protocols, and Services

The following table shows the supported features, protocols, and services. Junos OS Release 25.4R1 or later is required, unless otherwise specified.

Table 1: Supported Features, Protocols, and Services
Feature/Service	Description
Class of Service	Class of service (COS), hierarchical quality of service (HQOS), scheduling and queueing, classifiers, policers and rewrite rules are supported on the extended ports. Configuration of COS and HQOS is only supported on the AD. Classification and rewrite support is implemented on the AD, including behavior aggregation and multifield classifers.
Connectivity Fault Management	Support down maintenance endpoint (MEP) and up MEP continuity check messages (CCM) on extended ports and aex logical members. Support loopback ping and link trace on non-aex and aex logical members. MIP support for extended port non-aex and aex logical members. ITU-T Y.1731 support for Ethernet frame delay measurement (ETH-DM) in MEF 35 mode only. ITU-T Y.1731 support for Ethernet synthetic loss measurement (ETH-SLM) in MEF 35 mode only. Re-anchor CFM sessions when anchor FPC goes down. Support for CFM session distribution in enhanced CFM mode only.
EVPN-MPLS	Extended port as single-homed CE interface. Extended port as CE interface in all-active or single-active ESI mode. EVPN E-LAN over MPLS without IRB (L2 gateway). EVPN E-LAN over MPLS with IRB (L3 gateway). EVPN-Etree over MPLS without IRB (L2 gateway). Extended ports don't support `family mpls`. MPLS is supported on the core-facing ports on the AD.
EVPN-VPWS	Extended port as single-homed CE interface. Extended port as CE interface in all-active or single-active ESI mode. Local switching with and without single-active or all-active multihomed interface. Egress link protection for CE-PE access link failure.
EVPN-VXLAN	Default configuration.
EVPN-VPWS Flexible Cross-Connect	VLAN-unaware with extended port as single-homed CE interface. VLAN-unaware with extended port as CE interface in all-active or single-active ESI mode. VLAN-aware with extended port as single-homed CE interface. VLAN-aware with extended port as CE interface in all-active or single-active ESI mode.
Layer 2	L2 bridging on extended ports. L2VPN services on extended ports. L2circuit services on extended ports.
Layer 3 Protocols and Services	BFD (centralized mode only), BGP, OSPF, ISIS, and Multicast on extended ports. Integrated routing and bridging (IRB) L3VPN, SR-MPLS as transport, interface-based tunnels and next hop-based tunnels on extended ports as CEs. Extended ports don't support `family mpls`. MPLS is supported on the cascade port/uplink port connection.
LACP	Load balancing for cascade ports and extended ports. Extended ports configured for slow or fast periodic intervals. Centralized LACP. EVPN core isolation on extended ports.
Link Fault Management	IEEE 802.3ah LFM discovery on extended ports and aex extended ports.
LLDP	AD and extended ports. Aex members from the same or different SDs. Telemetry support for LLDP openconfig model. SNMP support for lldp.mib.
STP	RSTP, MSTP, and VSTP support: AD and extended ports Aex on the same SD or different SDs Non-stop bridging (NSB) for RSTP, MSTP, and VSTP on stand-alone and extended port aex. Telemetry support for STP openconfig model. SNMP support for rfc4188.mib.
VPLS	MAC learning and MAC move on extended ports. Flood route and next hop management on* extended ports.
VRRP	Extended ports and aex. VRRP v2 and v3. IPv4 and IPv6. Untagged, single tag, and dual tagged Ethernet. VRRP session inheritance. Track route and track interface. SNMP Get. Openconfig. VRRP proxy for IPv4. IRB support for CE interface in a bridge domain only.