Administrator Guide

FIP Snooping Prerequisites
Before you enable FCoE transit and configure FIP snooping on a switch, ensure that certain conditions are
met.
A FIP snooping bridge requires data center bridging exchange protocol (DCBx) and priority-based flow
control (PFC) to be enabled on the switch for lossless Ethernet connections (refer to
theData Center Bridging (DCB) chapter). Dell Networking recommends also enabling enhanced transmission
selection (ETS); however, ETS is recommended but not required.
If you enable DCBx and PFC mode is on (PFC is operationally up) in a port configuration, FIP snooping is
operational on the port. If the PFC parameters in a DCBx exchange with a peer are not synchronized, FIP and
FCoE frames are dropped on the port after you enable the FIP snooping feature.
For VLAN membership, you must:
• create the VLANs on the switch which handles FCoE traffic (use the interface vlan command).
• configure each FIP snooping port to operate in Hybrid mode so that it accepts both tagged and
untagged VLAN frames (use the portmode hybrid command).
• configure tagged VLAN membership on each FIP snooping port that sends and receives FCoE traffic and
has links with an FCF, ENode server, or another FIP snooping bridge (use the tagged port-type
slot/port command).
The default VLAN membership of the port must continue to operate with untagged frames. FIP snooping is
not supported on a port that is configured for non-default untagged VLAN membership.
FIP Snooping Restrictions
The following restrictions apply when you configure FIP snooping.
• The maximum number of FCoE VLANs supported on the switch is eight.
• The maximum number of FIP snooping sessions supported per ENode server is 32. To increase the
maximum number of sessions to 64, use the fip-snooping max-sessions-per-enodemac
command.
• The maximum number of FCFs supported per FIP snooping-enabled VLAN is 12.
• Links to other FIP snooping bridges on a FIP snooping-enabled port (bridge-to-bridge links) are not
supported on the switch.
Configuring FIP Snooping
You can enable FIP snooping globally on all FCoE VLANs on a switch or on an individual FCoE VLAN.
By default, FIP snooping is disabled.
To enable FCoE transit on the switch and configure the FCoE transit parameters on ports, follow these steps.
1 Enable the FCoE transit feature on a switch.
CONFIGURATION mode.
FCoE Transit 345