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Ethernet Switching and Bridging

  • Support for basic Layer 2 features (PTX10002-36QDD)—The following Layer 2 basic learning, bridging and flooding features are supported:

    • Enterprise style bridging (support both trunk and access mode)

    • Service provider style bridging (also known as sub-interface mode)

    • Handle BUM (broadcast, unknown unicast and multicast) traffic, including split horizon

    • MAC learning and aging

    • Static MAC addresses

    • Trunk port and VLAN membership

    • 802.1Q Ethertype - 8100

    • 802.1Q VLAN tagging: Single tagging with normalized to bridge domain tag at ingress

    • Clear all MAC address information

    • Global MAC limit

    • Global source MAC aging time

    • MAC moves

    • LACP and LLDP

    • Disable MAC learning at global and interface level

    • Native VLAN ID for Layer 2 logical interfaces

    • Single VLAN-tagged Layer 2 logical interfaces

    • Interface statistics

      Note:

      The show ethernet-switching statistics command and child logical interface statistics for aggregated Ethernet are not supported.

    • Flexible Ethernet services

      Note:

      Enterprise-style Layer 2 logical interfaces cannot be allowed under flexible-ethernet- services encapsulation.

    • Virtual switch

    • Persistent MAC learning (sticky MAC)

    • Service provider bridging:

      • Multiple logical interfaces on a same physical interface which are part of same bridge domain

      • Ethernet bridge encapsulation

    [See Layer 2 Bridging, Address Learning, and Forwarding User Guide.]

  • Support for interface MAC limit action (PTX10002-36QDD)—You can specify the action (drop, drop and log, log, or shut down) that Junos OS Evolved takes when packets with new source MAC addresses are received after the MAC address limit is reached.

    [See Configuring MAC Limiting and packet-action.]

  • Support for IRB (PTX10002-36QDD)—Support for IRB enables routing of Layer 3 traffic between a bridge domain and another routed interface. Support includes:

    • All Layer 2 protocols already supported on the router

    • Layer 3 protocols: BGP, IGMP, IS-IS, OSPF, PIM, and RIP

    • Per-IRB logical interface MAC and statistics

    • IRB Layer 3 multicast support with flooding only

    • Address family support for IPv4 and IPv6, and support for IPv4 MTUs and IPv6 MTUs with different MTU values

    • IRB interface in VRF routing instances

    • Directed subnet broadcast support with IRB

    • Support for VRRP on IRB

    [See Integrated Routing and Bridging, Configuring a Layer 2 Virtual Switch with a Layer 2 Trunk Port, and Understanding VRRP.]

  • Support for LLDP, xSTP, and BPDU protection (PTX10002-36QDD)—Support includes:

    • RSTP, VSTP, MSTP, STP, root protection for STP, concurrent configuration of RSTP and VSTP, virtual switch, and BPDU protection for spanning-tree protocols

    • Bridge protocol data unit (BPDU) protection for EVPN-VXLAN

    • LLDP support, including:

      • LLDP on em0 interfaces

      • Disabling of LLDP time, length, and value (TLV) messages

    [See Configuring STP, Understanding BPDU Protection for EVPN-VXLAN, and Device Discovery Using LLDP.]