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    Understanding Chassis Cluster Fabric Links

    The data link is referred to as the fabric interface. It is used by the cluster's Packet Forwarding Engines to transmit transit traffic and to synchronize the data plane software’s dynamic runtime state. When the system creates the fabric interface, the software assigns it an internally derived IP address to be used for packet transmission.

    The fabric is a physical connection between two nodes of a cluster and is formed by connecting a pair of Ethernet interfaces back-to-back (one from each node).

    Unlike for the control link, whose interfaces are determined by the system, you specify the physical interfaces to be used for the fabric data link in the configuration.

    For SRX Series chassis clusters, the fabric link can be any pair of Ethernet interfaces spanning the cluster; for J Series chassis clusters, the fabric link can be any pair of Gigabit Ethernet interface.

    Note: For SRX Series chassis clusters made up of SRX100, SRX210, SRX220, SRX240, SRX550, or SRX650 devices, SFP interfaces on Mini-PIMs cannot be used as the fabric link.

    Table 1 shows the fabric interface types that are supported for SRX Series devices.

    Table 1: Supported Fabric Interface Types for SRX Series Devices

    SRX5000 line

    SRX3000 line

    SRX1400

    SRX650 and SRX550

    SRX240

    SRX220

    SRX210

    SRX100

    Fast Ethernet

    Fast Ethernet

    Fast Ethernet

    Fast Ethernet

     

    Fast Ethernet

    Fast Ethernet

    Gigabit Ethernet

    Gigabit Ethernet

    Gigabit Ethernet

    Gigabit Ethernet

    Gigabit Ethernet

    Gigabit Ethernet

    Gigabit Ethernet

     

    10-Gigabit Ethernet

    10-Gigabit Ethernet

    10-Gigabit Ethernet

         

    For details about port and interface usage for management, control, and fabric links, see SRX Series Chassis Cluster Slot Numbering and Port/Interface Naming and J Series Chassis Cluster Slot Numbering and Port/Interface Naming.

    The fabric data link does not support fragmentation. To accommodate this state, jumbo frame support is enabled by default on the link with an MTU size of 9014 bytes. To ensure that traffic that transits the data link does not exceed this size, we recommend that no other interfaces exceed the fabric data link's MTU size.

    Modified: 2017-04-03