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  • Support for VLAN rewrite operations on CCC interfaces (MX480 and MX960)—Starting in Junos OS Release 21.2R1, you can configure VLAN rewrite operations on CCC interfaces.

    [See Configuring Q-in-Q Tunneling and VLAN Q-in-Q Tunneling and VLAN Translation.]

  • Support for coexistence of source IP hash with consistent hash (MX Series)—Starting in Junos OS Release 21.2R1, source IP hash, which allows the flow from a particular source IP to always be hashed to the same link while load-balancing the flows across multiple paths, supports consistent hash, which prevents the reordering of flows to active paths in an ECMP group when one or more paths fail.


    This feature is applicable only to external BGP (EBGP) ECMP paths.

    [See Configuring Load Balancing Using Source or Destination IP Only and Configuring Consistent Load Balancing for ECMP Groups.]

  • AMS on MPC10E line card (MX240, MX480, and MX960 with MX-SPC3)—Starting in Junos OS Release 21.2R1, we support load balancing and high availability (HA) features on aggregated multiservices (AMS) interfaces for Layer 4 and Layer 7 services such as stateful firewall, intrusion detection service (IDS), and the Traffic Load Balancer (TLB) application.