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Routing Protocols

  • BGP support for deterministic path forwarding (DPF) in a CLOS network (QFX5130-32CD, QFX5130-48C, QFX5130-48CM, QFX5700, QFX5700E, QFX5230-64CD, QFX5240-64OD, and QFX5240-64QD)—BGP DPF partitions a physical fabric into multiple logical fabrics for distinct 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 .]

  • GLB multi-link support on IP Fabric (QFX5240-64OD and QFX5240-64QD)—We are extending Global Load Balancing (GLB) on the QFX5240 platform to support multiple paths between spine and top-of-rack switches on a 3-stage CLOS IP fabric.

    To enable GLB for multi-link on a 3-CLOS IP fabric, include the glb-multilink-mode max-val|avg-val statement at [edit forwarding-options enhanced-hash-key] hierarchy level. By default, the spine advertises the average quality of all links. Make sure you enable GLB globally at [edit protocols bgp] hierarchy level.

    [See Configure GLB on 3-CLOS IP Fabric with Multilinks.]