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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 the Data 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 nondefault untagged VLAN membership.
Important Points to Remember
• Enable DCBx on the switch before enabling the FIP Snooping feature.
• To enable the feature on the switch, congure FIP Snooping.
• To allow FIP frames to pass through the switch on all VLANs, enable FIP snooping globally on a switch.
• A switch can support a maximum eight VLANs. Congure at least one FCF/bridge-to-bridge port mode interface for any FIP snooping-
enabled VLAN.
• You can congure multiple FCF-trusted interfaces in a VLAN.
• When you disable FIP snooping:
• ACLs are not installed, FIP and FCoE trac is not blocked, and FIP packets are not processed.
• The existing per-VLAN and FIP snooping conguration is stored. The conguration is re-applied the next time you enable the FIP
snooping feature.
•
To support FIP-Snooping and set CAM-ACL, usecam-acl l2acl 4 ipv4acl 4 ipv6acl 0 ipv4qos 2 l2qos 1 l2pt 0
ipmacacl 0 vman-qos 0 ecfmacl 0 fcoeacl 2
command.
CAM ACL Table
-- Chassis Cam ACL --
Current Settings(in block sizes)
1 block = 128 entries
L2Acl : 4
Ipv4Acl : 4
Ipv6Acl : 0
Ipv4Qos : 2
L2Qos : 1
L2PT : 0
IpMacAcl : 0
VmanQos : 0
VmanDualQos : 0
EcfmAcl : 0
FcoeAcl : 2
FCoE Transit
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