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What’s Changed in Release 21.3R1

EVPN

  • Support for displaying SVLBNH information—You can now view shared VXLAN load balancing next hop (SVLBNH) information when you display the VXLAN tunnel endpoint information for a specified ESI and routing instance by using the show ethernet-switching vxlan-tunnel-end-point esi esi-identifier esi-identifier instance instance svlbnh command.

General Routing

  • Enhancement to the show chassis pic command—You can now view additional information about the optics when you run the show chassis pic command. The output now displays the following additional field: MSA Version: Multi-source Agreements (MSA) version that the specified optics is compliant to. Values supported are: SFP+/SFP28 &-8212; SFF-8472 (versions 9.3 - 12.3), QSFP+/QSFP28 &-8212; SFF 8363 (versions 1.3 - 2.10), and QSFP-DD &-8212; CMIS 3.0, 4.0, 5.0. Previously, the show chassis pic command did not display this additional field.

    [See show chassis pic.]

  • Enhancement to the show interfaces (Aggregated Ethernet) command—You can now view additional information about the MAC statistics when you run the show interfaces extensive ae command. The output now displays the following additional field: MAC statistics: Receive Transmit Broadcast packets 0 0 Multicast packets 0 0. Previously, the show interfaces extensive ae command did not display this additional field.

    [See show chassis pic.]

Junos XML API and Scripting

  • Changes to how command-line arguments are passed to Python action scripts (ACX Series, EX Series, MX Series, PTX Series, QFX Series, SRX Series, vMX, and vSRX)—When a custom YANG RPC invokes a Python action script and passes command-line arguments to the script, the device prefixes a hyphen (-) to single-character argument names, and it prefixes two hyphens (—) to multi-character argument names. The prefix enables you to use standard command-line parsing libraries to handle the arguments. In earlier releases, the device passes the unmodified argument names to the script.

    [See Creating Action Scripts for YANG RPCs on Devices Running Junos OS.]

Layer 2 Ethernet Services

  • Link selection support for DHCP—We have introduced the link-selection statement at the [edit forwarding-options dhcp-relay relay-option-82] hierarchy level, which allows DHCP relay to add suboption 5 to option 82. Suboption 5 allows DHCP proxy clients and relay agents to request an IP address for a specific subnet from a specific IP address range and scope. Prior to this release, the DHCP relay dropped packets during the renewal DHCP process and the DHCP server used the leaf's address as a destination to acknowledge the DHCP renewal message.

    [See relay-option-82.]

Network Management and Monitoring

  • Changes in contextEngineID for SNMPv3 INFORMS (ACX Series, EX Series, MX Series, PTX Series, QFX Series, and SRX Series)—Now the contextEngineID of SNMPv3 INFORMS is set to the local engine-id of Junos devices. In earlier releases, the contextEngineID of SNMPv3 INFORMS was set to remote engine-id.

    [See SNMP MIBs and Traps Supported by Junos OS.]