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Servers

Server Edge Port Connectivity

  • The Server Edge Port Connectivity variables, define infrastructure elements that connect to the fabric on switched interface(s).
  • The infrastructure elements are not limited to servers, but any device that connect to a L2 switch port, i.e.: firewalls, load balancers and storage.

Variables and Options:

# Optional profiles to apply on Server facing interfaces
# Each profile can support all or some of the following keys according your own needs.
# Keys are the same used under Server Adapters.
# Keys defined under Server Adapters take precedence.
port_profiles:
  < port_profile_1 >:
    speed: < interface_speed | forced interface_speed | auto interface_speed >
    mode: < access | dot1q-tunnel | trunk >
    native_vlan: <native vlan number>
    vlans: < vlans as string >
    spanning_tree_portfast: < edge | network >
    spanning_tree_bpdufilter: < true | false >
    flowcontrol:
      received: < received | send | on >
    qos_profile: < qos_profile_name >
    ptp:
      enable: < true | false >
    storm_control:
      all:
        level: < Configure maximum storm-control level >
        unit: < percent | pps > | Optional var and is hardware dependant - default is percent)
      broadcast:
        level: < Configure maximum storm-control level >
        unit: < percent | pps > | Optional var and is hardware dependant - default is percent)
      multicast:
        level: < Configure maximum storm-control level >
        unit: < percent | pps > | Optional var and is hardware dependant - default is percent)
      unknown_unicast:
        level: < Configure maximum storm-control level >
        unit: < percent | pps > | Optional var and is hardware dependant - default is percent)
    port_channel:
      description: < port_channel_description >
      mode: < active | passive | on >

# Dictionary of servers, a device attaching to a L2 switched port(s)
servers:

  # Server name, this will be used in the switchport description
  < server_1 >:

    # rack is used for documentation purposes only
    rack: < rack_id >

    # A list of adapter(s), group by adapters leveraging the same port-profile.
    adapters:

      # Example of stand-alone adapter

        # Adapter speed - if not specified will be auto.
      - speed: < interface_speed | forced interface_speed | auto interface_speed >

        # Local server port(s)
        server_ports: [ < interface_name > ]

        # List of port(s) connected to switches
        switch_ports: [ < switchport_interface > ]

        # List of switche(s)
        switches: [ < device > ]

        # Port-profile name, to inherit configuration.
        profile: < port_profile_name >

        # Interface mode | required
        mode: < access | dot1q-tunnel | trunk >

        # Native VLAN for a trunk port | optional
        native_vlan: <native vlan number>

        # Interface vlans | required
        vlans: < vlans as string >

        # Spanning Tree
        spanning_tree_portfast: < edge | network >
        spanning_tree_bpdufilter: < true | false >

        # Flow control | Optional
        flowcontrol:
          received: < received | send | on >

        # QOS Profile | Optional
        qos_profile: < qos_profile_name >

        # PTP Enable | Optional
        ptp:
          enable: < true | false >

      < port_profile_2 >:
        mode: < access | dot1q-tunnel | trunk >
        vlans: < vlans as string >

        # Storm control settings applied on port toward server | Optional
        storm_control:
          all:
            level: < Configure maximum storm-control level >
            unit: < percent | pps > | Optional var and is hardware dependant - default is percent)
          broadcast:
            level: < Configure maximum storm-control level >
            unit: < percent | pps > | Optional var and is hardware dependant - default is percent)
          multicast:
            level: < Configure maximum storm-control level >
            unit: < percent | pps > | Optional var and is hardware dependant - default is percent)
          unknown_unicast:
            level: < Configure maximum storm-control level >
            unit: < percent | pps > | Optional var and is hardware dependant - default is percent)


      # Example of port-channel adpater
      - server_ports: [ < interface_name_1 > , < interface_name_2 > ]
        switch_ports: [ < switchport_interface_1 >, < switchport_interface_2 > ]
        switches: [ < device_1 >, < device_2 > ]
        profile: < port_profile_name >

        # Port- Channel
        port_channel:

          # Port-Channel Description.
          description: < port_channel_description >

          # Port-Channel Mode.
          mode: < active | passive | on >

  < server_2 >:
    rack: RackC
    adapters:
      - speed: < interface_speed | forced interface_speed | auto interface_speed >
        server_ports: [ < interface_name > ]
        switch_ports: [ < switchport_interface > ]
        switches: [ < device > ]
        profile: < port_profile_name >
      - server_ports: [ < interface_name_1 > , < interface_name_2 > ]
        switch_ports: [ < switchport_interface_1 >, < switchport_interface_2 > ]
        switches: [ < device_1 >, < device_2 > ]
        profile: < port_profile_name >
        port_channel:
          description: < port_channel_description >
          mode: '< active | passive | on >'
          short_esi: < 0000:0000:0000 >

Examples

port_profiles:

  VM_Servers:
    mode: trunk
    vlans: "110-111,120-121,130-131"
    spanning_tree_portfast: edge

  MGMT:
    mode: access
    vlans: "110"

  DB_Clusters:
    mode: trunk
    vlans: "140-141"


servers:

  server01:
    rack: RackB
    adapters:

      # Single homed interface from E0 toward DC1-LEAF1A_Eth5
      - server_ports: [ E0 ]
        switch_ports: [ Ethernet5 ]
        switches: [ DC1-LEAF1A ]
        profile: MGMT

      # MLAG dual-homed connection from E1 to DC1-LEAF2A_Eth10
      #                            from E2 to DC1-LEAF2B_Eth10
      - server_ports: [ E1, E2 ]
        switch_ports: [ Ethernet10, Ethernet10 ]
        switches: [ DC1-LEAF2A, DC1-LEAF2B ]
        profile: DB_Clusters
        port_channel:
          description: PortChanne1
          mode: active

  server03:
    rack: RackC
    adapters:

      # MLAG dual-homed connection from E0 to DC1-SVC3A_Eth10
      #                            from E1 to DC1-SVC3B_Eth10
      - server_ports: [ E0, E1 ]
        switch_ports: [ Ethernet10, Ethernet10 ]
        switches: [ DC1-SVC3A, DC1-SVC3B ]
        profile: VM_Servers
        port_channel:
          description: PortChanne1
          mode: active

Single attached server scenario

Single attached interface from E0 toward DC1-LEAF1A interface Eth5

servers:
  server01:
    rack: RackB
    adapters:
      - server_ports: [ E0 ]
        switch_ports: [ Ethernet5 ]
        switches: [ DC1-LEAF1A ]
        profile: MGMT

MLAG dual-attached server scenario

MLAG dual-homed connection:

  • From E0 to DC1-SVC3A interface Eth10
  • From E1 to DC1-SVC3B interface Eth10
servers:
  server01:
    rack: RackB
    adapters:
      - server_ports: [ E0, E1 ]
        switch_ports: [ Ethernet10, Ethernet10 ]
        switches: [ DC1-SVC3A, DC1-SVC3B ]
        profile: VM_Servers
        port_channel:
          description: PortChanne1
          mode: active

EVPN A/A ESI dual-attached server scenario

To help provide consistency when configuring EVPN A/A ESI values, arista.avd provides an abstraction in the form of a short_esi key. short_esi is an abbreviated 3 octets value to encode Ethernet Segment ID and LACP ID. Transformation from abstraction to network values is managed by a filter_plugin and provides following result:

  • EVPN ESI: 000:000:0303:0202:0101
  • LACP ID: 0303.0202.0101
  • Route Target: 03:03:02:02:01:01

Active/Active multihoming connections:

  • From E0 to DC1-SVC3A interface Eth10
  • From E1 to DC1-SVC4A interface Eth10
servers:
  server01:
    rack: RackB
    adapters:
      - server_ports: [ E0, E1 ]
        switch_ports: [ Ethernet10, Ethernet10 ]
        switches: [ DC1-SVC3A, DC1-SVC4A ]
        profile: VM_Servers
        port_channel:
          description: PortChanne1
          mode: active
          short_esi: 0303:0202:0101