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Ethernet Switching and Bridging

  • Flexible VLAN tagging (vSRX and vSRX 3.0)—Starting in Junos OS Release 22.1R1, vSRX and vSRX 3.0 instances deployed on KVM and VMware platforms support flexible VLAN tagging on revenue and reth interfaces.

    You use VLAN tagging to indicate which packet belongs to which VLAN by tagging the packet with a VLAN tag in the Ethernet frame. Flexible VLAN tagging supports transmission of 802.1Q VLAN single-tag frames on logical interfaces on the Ethernet port. With this feature support you can avoid multiple virtual functions on the network interface card (NIC) and reduce the need of additional interfaces.

    [See Configuring VLAN Tagging and flexible-vlan-tagging (Interfaces).]

  • Support for alternate LLDP destination addresses (EX2300, EX2300-C, EX3400, EX4400-24MP, EX4400-24P, EX4400-24T, EX4400-48MP, EX4400-48P, EX4400-48T, EX4600, EX4650, and EX9200)—Starting in Junos OS Release 22.1R1, we support alternate LLDP destination MAC addresses as specified in the IEEE 802.1AB-2016 standard. Our new CLI statements ensure that LLDP packets arrive at the correct destination MAC address. If you don't specify a configuration, then the the device sends the packets to the nearest-bridge MAC address, which is 01:80:c2:00:00:0e. The new CLI statements are:

    • set protocols lldp dest-mac-type <mac-type>—For packets sent out of all interfaces.
    • set protocols lldp interface <intf-name> dest-mac-type <mac-type>—For packets sent out of a specific interface.

    [See Configuring LLDP.]