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Ethernet Switching and Bridging

  • Support for multiple TPID configurations per VLAN on QFX5100, QFX5110, QFX5120, QFX5200, and QFX5210—Starting in Junos OS Release 22.4R1, the QFX5100, QFX5110, QFX5120, QFX5200, and QFX5210 switches support up to four Tag Protocol Identifier (TPID) configurations per VLAN. The system supports the following values for the TPID configuration: 0x8100, 0x9200, 0x88a8, and 0x9100. You have to define a TPID in the CLI for aggregated Ethernet interfaces and the Ethernet interfaces for the device, before you send or receive a TPID.

    [See Configuring Tag Protocol IDs (TPIDs) on QFX Series Switches and tag-protocol-id (TPIDs Expected to Be Sent or Received).]

  • Support for transmitting maximum VLAN Name TLVs in LLDP—Junos OS Release 22.4R1 supports transmission of more than 5 VLAN name type, length, and value (TLVs) in the Link Layer Discovery Protocol (LLDP) data units. The LLDP data units can carry as many TLVs as possible. The number of VLAN TLVs is decided dynamically based on the maximum transmission unit (MTU) of the interface and other necessary TLVs that the protocol data units need to carry. The command set protocols lldp interface <name> transmit-max-vlan-tlv enables the system to send the maximum VLAN TLVs in the LLDP data units.

    The TLVs advertise information to peers. TLVs are used by LLDP neighbors to discover a device’s capabilities.

    [See Configuring the Transmission of Maximum VLAN Name TLVs in LLDP, show lldp, and show lldp neighbors-vlan-name-tlv-list interface.]