White Papers

Table Of Contents
port on the FCoE VLAN. The FIP advertisement also contains a keepalive message to maintain connectivity between a SAN
fabric and downstream servers.
Configure an NPIV Proxy Gateway
You can directly connect an NPIV proxy gateway to a server or a server over a FIP snooping bridge.
If you connect the S5000 and a FIP snooping bridge using a port channel, configure the port channel on both devices (the
interface port-channel command on the S5000).
NOTE: DCB is enabled by default. Auto-negotiated DCBx is enabled for converged traffic by default on all S5000 Ethernet
ports. FCoE transit with FIP snooping is automatically enabled when you configure Fibre Channel capability (refer to
Enabling Fibre Channel Capability on the Switch).
To configure NPG operation, follow these configuration steps:
1. Enabling Fibre Channel Capability on the Switch
2. Creating a DCB Map
3. Applying a DCB Map on Server-Facing Ethernet Ports
4. Creating an FCoE VLAN
5. Applying an FCoE Map on Server-Facing Ethernet Ports
6. Applying an FCoE Map on Fabric-Facing FC Ports
Enabling Fibre Channel Capability on the Switch
To configure as an NPG for the Fibre Channel protocol, you must first enable an S5000 switch.
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. For more information, refer to Enable FIP Snooping on VLANs.
Enable the switch for the Fibre Channel protocol.
CONFIGURATION mode
feature fc
Creating a DCB Map
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 NPG.
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 or
whether priority group traffic should be handled with strict-priority scheduling.
DCB MAP mode
priority-group group_num {bandwidth percentage | strict-priority} pfc {on | off}
The sum of all allocated bandwidth percentages must be 100%.
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.
NOTE: 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
NPIV Proxy Gateway
565