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    NSM4000 Ethernet Interfaces Overview

    An NSM4000 appliance has four Ethernet interfaces; three interfaces can be used and one is reserved for future use. The Ethernet interfaces are labeled 0, 1, 2, and 3 for the NSM4000 appliance.

    You can use the Ethernet interfaces as follows:

    • eth0—Use the eth0 interface to configure the virtual IP (VIP) address of a fabric and the IP address of the node as well as to access the managed devices. The VIP address and the IP address of the node should be on the same subnet.

      The eth0:0 subinterface provides access to the NSM4000 Network Management Platform GUI. You can access the GUI by using the VIP address of the fabric.

    • eth1—Use the eth1 interface as an administrative interface for an NSM4000 node. Use SSH to access an NSM4000 node through this interface. The eth0 interface and the eth1 interface can be on different subnets.

      If you configure eth1, you cannot access the NSM4000 nodes using the eth0 interface. You can access the CLI of the NSM4000 virtual appliance only through the eth1 interface.

    • eth2—The eth2 interface is reserved for future use.
    • eth3—Use the eth3 interface as the device management interface for SSH access to managed devices when the managed devices are on an out-of-band management subnet or on a subnet not accessible through the eth0 interface.

      Note: If the managed devices are not accessible through the default gateway, you must configure static routes. Any static route configured manually is populated in the main routing table, which is used to route traffic through the eth0 interface.

    • When you configure an appliance as an NSM4000 node, you can configure the Ethernet interfaces as follows:
      • Configure only the eth0 interface.

        When only Ethernet interface0 (eth0) is used, the NSM4000 nodes in the fabric, the virtual IP (VIP) address of the fabric, and the devices being managed by NSM4000 are on the same subnet.

      • Configure the eth0 and eth3 interfaces.

        When Ethernet interfaces eth0 and eth3 are used, the NSM4000 nodes in the fabric and VIP address of the fabric are on the same subnet and are reachable through eth0. The devices being managed by NSM4000 are on the same subnet, which is different from the one reachable through eth0, and are reachable through eth3.

      • Configure the eth0 and eth1 interfaces.

        When Ethernet interfaces eth0 and eth1 are used, the NSM4000 nodes in the fabric and the VIP address of the fabric might or might not be on the same subnet. The eth1 interface provides SSH access to the NSM4000 nodes.

        The VIP address and the devices being managed by NSM4000 are on the same subnet.

      • Configure the eth0, eth1, and eth3 interfaces.

        When Ethernet interfaces eth0, eth1, and eth3 are used, the NSM4000 nodes in the fabric and the VIP address of the fabric might or might not be on the same subnet. The NSM4000 nodes are reachable (SSH access) only through the eth1 interface.

        The managed devices can be reached through the eth0 interface if they are configured on the same subnet as the VIP address; on any other subnet, the managed devices can be reached through the eth3 interface.

        Note: If the managed devices are not reachable through the default gateway configured for the eth3 interface, you must configure static routes for the eth3 interface. The eth3 interface refers to the devint routing table.

        Any static route configured manually is populated in the main routing table, which is used to route traffic through the eth0 interface.

    • When you configure an appliance as a specialized node used for fault monitoring and performance monitoring (FMPM), you can use only the Ethernet interfaces eth0 and eth1.

      Ethernet interface eth1 provides SSH access to FMPM nodes.

    Table 1 summarizes the functions of Ethernet interfaces on the NSM4000 appliance.

    Table 1: NSM4000 Appliance Ethernet Interfaces

    Interface

    Function

    eth0

    SSH and device management, if only the eth0 is used

    eth0

    GUI interface

    eth1

    SSH access to the NSM4000 nodes

    Note: SSH is disabled on the eth0 and eth3 interfaces when eth1 is configured.

    eth2

    Reserved for future use

    eth3

    Device management when managed devices are on an out-of-band management subnet and not reachable by the Ethernet interface eth0

    Published: 2014-10-30