Concept Guide

Impact Description
Link aggregation group (LAG) FIP snooping is supported on port channels on ports on which PFC
mode is on (PFC is operationally up).
STP If you enable an STP protocol (STP, RSTP, PVSTP, or MSTP) on
the switch and ports enter a blocking state, when the state change
occurs, the corresponding port-based ACLs are deleted. If a port is
enabled for FIP snooping in ENode or FCF mode, the ENode/FCF
MAC-based ACLs are deleted.
FIP Snooping Prerequisites
Before you enable FCoE transit and congure 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 ow 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 conguration, 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 trac (use the interface vlan command).
• congure each FIP snooping port to operate in Hybrid mode so that it accepts both tagged and untagged VLAN frames (use the
portmode hybrid command).
• congure tagged VLAN membership on each FIP snooping port that sends and receives FCoE trac 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
congured for non-default untagged VLAN membership.
FIP Snooping Restrictions
The following restrictions apply when you congure 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.
Conguring 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 congure the FCoE transit parameters on ports, follow these steps.
1 Enable the FCoE transit feature on a switch.
CONFIGURATION mode.
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FCoE Transit