Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

Enable the Fibre Channel capability on an Aggregator that you want to configure as an NPG for the Fibre Channel protocol. When you enable Fibre Channel capability, FCoE transit with FIP snooping is automatically enabled on all VLANs on the switch, using the default FCoE transit settings.

1. Enable the Fibre Channel capability on an Aggregator for the Fibre Channel protocol.

   CONFIGURATION mode

   feature fc

Configure the priority-based flow control (PFC) and enhanced traffic selection (ETS) settings in a DCB map before you apply them on downstream server-facing ports on an Aggregator.

1. Create a DCB map to specify PFC and ETS settings for groups of dot1p priorities.

   CONFIGURATION mode

   dcb-map name

2. Configure the PFC setting (on or off) and the ETS bandwidth percentage allocated to traffic in each priority group. Configure whether the priority group traffic should be handled with strict-priority scheduling. The sum of all allocated bandwidth percentages must be 100 percent. Strict-priority traffic is serviced first. Afterward, bandwidth allocated to other priority groups is made available and allocated according to the specified percentages. If a priority group does not use its allocated bandwidth, the unused bandwidth is made available to other priority groups.

   Restriction: You can enable PFC on a maximum of two priority queues.

   Repeat this step to configure PFC and ETS traffic handling for each priority group, for example: priority-group 0 bandwidth 60 pfc off priority-group 1 bandwidth 20 pfc on priority-group 2 bandwidth 20 pfc on priority-group 4 strict-priority pfc off

   DCB MAP mode

   priority-group group_num { bandwidth percentage | strict-priority} pfc { on | off}

3. Specify the priority group ID number to handle VLAN traffic for each dot1p class-of-service: 0 through 7. Leave a space between each priority group number. For example, priority-pgid 0 0 0 1 2 4 4 4 where dot1p priorities 0, 1, and 2 are mapped to priority group 0; dot1p priority 3 is mapped to priority group 1; dot1p priority 4 is mapped to priority group 2; dot1p priorities 5, 6, and 7 are mapped to priority group 4.

   All priorities that map to the same egress queue must be in the same priority group.

   DCB MAP mode

   priority-pgid dot1p0_group_num dot1p1_group_num dot1p2_group_num dot1p3_group_num dot1p4_group_num dot1p5_group_num dot1p6_group_num dot1p7_group_num

Important Points to Remember

• If you remove a dot1p priority-to-priority group mapping from a DCB map ( no priority pgid command), the PFC and ETS parameters revert to their default values on the interfaces on which the DCB map is applied. By default, PFC is not applied on specific 802.1p priorities; ETS assigns equal bandwidth to each 802.1p priority.

  As a result, PFC and lossless port queues are disabled on 802.1p priorities, and all priorities are mapped to the same priority queue and equally share port bandwidth.

• To change the ETS bandwidth allocation configured for a priority group in a DCB map, do not modify the existing DCB map configuration. Instead, create a new DCB map with the desired PFC and ETS settings, and apply the new map to the interfaces to override the previous DCB map settings. Then, delete the original dot1p priority-to-priority group mapping.
• If you delete the dot1p priority-to-priority group mapping ( no priority pgid command) before you apply the new DCB map, the default PFC and ETS parameters are applied on the interfaces. This change may create a DCB mismatch with peer DCB devices and interrupt the network operation.

You can apply a DCB map only on a physical Ethernet interface and can apply only one DCB map per interface.

1. Enter CONFIGURATION mode on a server-facing port or port channel to apply a DCB map.

   You cannot apply a DCB map on a port channel. However, you can apply a DCB map on the ports that are members of the port channel.

   CONFIGURATION mode

   interface { tengigabitEthernet slot/ port }

2. Apply the DCB map on an Ethernet port or port channel. The port is configured with the PFC and ETS settings in the DCB map.

   Repeat this step to apply a DCB map to more than one port or port channel.

   INTERFACE mode

   dcb-map name

   Dell# interface tengigabitEthernet 0/0
                                             Dell(config-if-te-0/0)# dcb-map SAN_DCB1
                                          

Create a dedicated VLAN to send and receive Fibre Channel traffic over FCoE links between servers and a fabric over an NPG. The NPG receives FCoE traffic and forwards decapsulated FC frames over FC links to SAN switches in a specified fabric.

1. Create the dedicated VLAN for FCoE traffic. Range: 2–4094.

   VLAN 1002 is commonly used to transmit FCoE traffic.

   CONFIGURATION mode

   interface vlan vlan-id

When you apply an FCoE map to an Ethernet port , the port is automatically configured as a tagged member of the FCoE VLAN.

An FCoE map consists of:

• An association between the dedicated VLAN, used to carry FCoE traffic, and the SAN fabric where the storage arrays are installed. Use a separate FCoE VLAN for each fabric to which the FCoE traffic is forwarded. Any non-FCoE traffic sent on a dedicated FCoE VLAN is dropped.
• The FC-MAP value, used to generate the fabric-provided MAC address (FPMA). The FPMA is used by servers to transmit FCoE traffic to the fabric. You can associate an FC-MAP with only one FCoE VLAN and conversely, associate an FCoE VLAN with only one FC-MAP.
• FCF priority, the priority used by a server CNA to select an upstream FCoE forwarder (FCF).
• FIP keepalive (FKA) advertisement timeout.

The values for the FCoE VLAN, fabric ID and FC-MAP must be unique. Apply an FCoE map on downstream server-facing Ethernet ports and upstream fabric-facing Fibre Channel ports.

1. Create an FCoE map that contains parameters used in the communication between servers and a SAN fabric.

   CONFIGURATION mode

   fcoe-map map-name

2. Configure the association between the dedicated VLAN and the fabric where the desired storage arrays are installed. The fabric and VLAN ID numbers must be the same. Fabric and VLAN ID range: 2–4094.

   For example: fabric id 10 vlan 10

   FCoE MAP mode

   fabric-id fabric-num vlan vlan-id

3. Add a text description of the settings in the FCoE map. Maximum: 32 characters.

   FCoE MAP mode

   description text

4. Specify the FC-MAP value used to generate a fabric-provided MAC address, which is required to send FCoE traffic from a server on the FCoE VLAN to the FC fabric specified in Step 2. Enter a unique MAC address prefix as the FC-MAP value for each fabric. Range: 0EFC00–0EFCFF. Default: None.

   FCoE MAP mode

   fc-map fc-map-value

5. Configure the priority used by a server CNA to select the FCF for a fabric login (FLOGI). Range: 1–255. Default: 128.

   FCoE MAP mode

   fcf-priority priority

6. Enable the monitoring FIP keepalive messages (if it is disabled) to detect if other FCoE devices are reachable. Default: FIP keepalive monitoring is enabled.

   FCoE MAP mode

   keepalive

7. Configure the time interval (in seconds) used to transmit FIP keepalive advertisements. Range: 8–90 seconds. Default: 8 seconds.

   FCoE MAP mode

   fka-adv-period seconds

You can apply multiple FCoE maps on an Ethernet port or port channel. When you apply an FCoE map on a server-facing port or port channel:

• The port is configured to operate in hybrid mode (accept both tagged and untagged VLAN frames).
• The associated FCoE VLAN is enabled on the port or port channel.

When you enable a server-facing Ethernet port, the servers respond to the FIP advertisements by performing FLOGIs on upstream virtualized FCF ports. The NPG forwards the FLOGIs as FDISC messages to a SAN switch.

1. Configure a server-facing Ethernet port or port channel with an FCoE map.

   CONFIGURATION mode

   interface { tengigabitEthernet slot/ port | port-channel num}

2. Apply the FCoE/FC configuration in an FCoE map on the Ethernet port. Repeat this step to apply an FCoE map to more than one port.

   INTERFACE or INTERFACE PORT_CHANNEL mode

   fcoe-map map-name

   Dell# interface tengigabitEthernet 0/0
                                             Dell(config-if-te-0/0)# 
                                             fcoe-map SAN_FABRIC_A
                                                Dell# interface port-channel 3
                                             
                                             Dell(config-if-te-0/0)# dcb-map SAN_DCB1
                                             Dell(config-if-po-3)# fcoe-map SAN_FABRIC_A
                                             
                                          

3. Enable the port for FCoE transmission using the map settings.

   INTERFACE mode

   no shutdown

The Aggregator, with the FC ports, are configured by default to operate in N port mode to connect to an F port on an FC switch in a fabric. You can apply only one FCoE map on an FC port.

When you apply an FCoE map on a fabric-facing FC port, the FC port becomes part of the FCoE fabric, whose settings in the FCoE map are configured on the port and exported to downstream server CNA ports.

Each Aggregator, with the FC port, is associated with an Ethernet MAC address (FCF MAC address). When you enable a fabric-facing FC port, the FCoE map applied to the port starts sending FIP multicast advertisements using the parameters in the FCoE map over server-facing Ethernet ports. A server sees the FC port, with its applied FCoE map, as an FCF port.

1. Configure a fabric-facing FC port.

   CONFIGURATION mode

   interface fibrechannel slot/ port

2. Apply the FCoE and FC fabric configurations in an FCoE map to the port. Repeat this step to apply an FCoE map to more than one FC port.

   INTERFACE FIBRE_CHANNEL mode

   fabric map-name

   Dell# interface fi 0/9
                                             Dell(config-if-fc-0/9)# fabric SAN_FABRIC_A
                                          

3. Enable the port for FC transmission.

   INTERFACE FIBRE_CHANNEL mode

   no shutdown

Important Points to Remember

You can apply a DCB or FCoE map to a range of Ethernet or Fibre Channel interfaces by using the interface range command; for example:

Dell(config)# interface range tengigabitEthernet 0/1 - 4

Dell(config)# interface range fibrechannel 0/9 - 10

Enter the keywords interface range followed by an interface type and port range. A port range must contain spaces before and after the dash. Separate each interface type and port range with a space, comma, and space as shown in the preceding examples.

1. Configure a DCB map with PFC and ETS settings:

   Dell(config)# dcb-map SAN_DCB_MAP

   Dell(config-dcbx-name)# priority-group 0 bandwidth 60 pfc off

   Dell(config-dcbx-name)# priority-group 1 bandwidth 20 pfc on

   Dell(config-dcbx-name)# priority-group 2 bandwidth 20 pfc on

   Dell(config-dcbx-name)# priority-group 4 strict-priority pfc off

   Dell(conf-dcbx-name)# priority-pgid 0 0 0 1 2 4 4 4

2. Apply the DCB map on a downstream (server-facing) Ethernet port:

   Dell(config)# interface tengigabitethernet 0/1

   Dell(config-if-te-0/0)#dcb-map SAN_DCB_MAP

3. Create the dedicated VLAN to be used for FCoE traffic:

   Dell(conf)#interface vlan 1002

4. Configure an FCoE map to be applied on downstream (server-facing) Ethernet and upstream (core-facing) FC ports:

   Dell(config)# fcoe-map SAN_FABRIC_A

   Dell(config-fcoe-name)# fabric-id 1002 vlan 1002

   Dell(config-fcoe-name)# description "SAN_FABRIC_A"

   Dell(config-fcoe-name)# fc-map 0efc00

   Dell(config-fcoe-name)# keepalive

   Dell(config-fcoe-name)# fcf-priority 128

   Dell(config-fcoe-name)# fka-adv-period 8

5. Enable an upstream FC port:

   Dell(config)# interface fibrechannel 0/9

   Dell(config-if-fc-0)# no shutdown

6. Enable a downstream Ethernet port:

   Dell(config)#interface tengigabitEthernet 0/1

   Dell(conf-if-te-0)# no shutdown