Reference Guide

352 | FCoE Transit

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As soon as you enable the FCoE transit feature on a switch-bridge, the existing VLAN-specific and FIP

snooping configurations are applied. The FCoE database is populated when the switch connects to a

converged network adapter (CNA) or FCF port and compatible DCB configurations are synchronized. By

default, all FCoE and FIP frames are dropped unless specifically permitted by existing FIP

snooping-generated ACLs. You can reconfigure any of the FIP snooping settings.

If you disable FCoE transit, FIP and FCoE traffic are handled as normal Ethernet frames and no FIP

snooping ACLs are generated. The VLAN-specific and FIP snooping configuration is disabled and stored

until you re-enable FIP snooping and the configurations are re-applied.

Enabling FIP Snooping on VLANs

You can enable FIP snooping globally on a switch on all VLANs or on a specified VLAN. When you

enable FIP snooping on VLANs:

• FIP frames are allowed to pass through the switch on the enabled VLANs and are processed to

generate FIP snooping ACLs.

• FCoE traffic is allowed on VLANs only after a successful virtual-link initialization (fabric login

FLOGI) between an ENode and an FCF. All other FCoE traffic is dropped.

• You must configure at least one interface in FCF mode on each FIP snooping-enabled VLAN.

• On an S5000 NPIV proxy gateway:

• A maximum of 12 VLANs are supported for FIP snooping.

• The maximum number of FCFs supported on a FIP snooping-enabled VLAN is 12.

• On an S5000 switch not configured as an NPIV proxy gateway:

• A maximum of eight VLANs are supported for FIP snooping.

• The maximum number of FCFs supported on a FIP snooping-enabled VLAN is 12.

Note: When you configure the S5000 as an NPIV proxy gateway and enable Fibre Channel capability

(feature fc command), FIP snooping is automatically enabled on all VLANs on the switch using the default

FIP snooping settings.

Note: When you enable FCoE transit, FIP solicitation responses from an FCF may be forwarded on an

FCoE VLAN to multiple ENodes.