Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

 
 

Routing Protocols

  • BGP support for deterministic path forwarding (DPF) in a CLOS network (EX4100-48MP, EX4100-24MP, EX4100-48P, EX4100-48T, EX4400-48MXP, EX4400-48P, EX4400-48T, QFX5120-32C, QFX5120-48T, QFX5120-48Y, and QFX5120-48YM)—BGP Deterministic Path Forwarding (DPF) divides a physical fabric into multiple logical fabrics so that different flows can be mapped to different logical fabrics to serve the requirements of the flows. Single hop External BGP (EBGP) might not meet all DC flow requirements, especially for drop and latency sensitive AI ML flows. BGP DPF colors the single-hop EBGP session on each link with a fabric color. If a link belongs to the red fabric, the EBGP session over the link is colored red. A route with no color community is advertised over any colored or uncolored EBGP sessions.

    To configure fabric colors for BGP neighbors include the fabric-color com-name statement at the [edit protocols bgp] hierarchy level. You can also configure this feature at the BGP group or neighbor level.

    To advertise colored IPv4 or IPv6 routes, include the fabric-advertise statement at the [edit protocols bgp] hirearchy level.

    [See BGP Deterministic Path Forwarding in a CLOS Network .]

  • IS-IS multi-instance support on a single interface (ACX5448, MX204, MX240, MX301, MX304, MX480, MX960,MX2008, MX2010, MX2020, MX10003, MX10004, MX10008, MX10016, QFX5100VC, QFX10002-60C, QFX5110, QFX5120, QFX5200, QFX5210, QFX10002, QFX10008, and QFX10016)—We have enhaced the IS-IS multi-instance feature to support multiple IS-IS instances on the same logical interface with instance identifier TLV 7.

    Include the instance-id statement at the [edit protocols isis-instance name hierarchy level.

    [See How to Configure Multiple Independent IGP Instances of IS-IS.]

  • Proactive IPv6 Neighbor Detection (QFX5110)—Proactive IPv6 neighbor detection enables Junos OS to periodically discover and verify the reachability of IPv6 hosts connected to an interface. When enabled, the system sends Neighbor Solicitation messages for a configured IPv6 address range and updates the IPv6 neighbor cache upon receiving Neighbor Advertisements. You enable the feature globally and configure host discovery parameters per interface, including discovery interval and aging time out. The system refreshes learned neighbors when the aging timer expires and retries unresolved addresses based on the configured discovery interval. This feature helps operators proactively validate host reachability and maintain accurate neighbor cache entries in environments where host routes are not dynamically learned.

  • NDP Proxy Support with VRRP (SRX1500, SRX5400, QFX5110, QFX5120-32C, QFX5120-48T, QFX5120-48Y, QFX5120-48YM, QFX5200 and QFX5210)—NDP proxy support with VRRP enables a router to use the VRRP virtual MAC address when replying to IPv6 Neighbor Solicitation requests and DAD requests on behalf of other hosts. When you configure an interface with NDP proxy or DAD proxy and VRRP, only the VRRP master generates proxy Neighbor Advertisements. VRRP backup routers drop proxy requests and do not send proxy Neighbor Advertisement responses. This behavior supports both interface restricted and interface unrestricted proxy modes and maintains consistent address resolution during VRRP failover by keeping the MAC address stable. The feature also supports proxying for protocol installed IPv6 user host routes when user route proxy is enabled.