Dell PowerConnect 8100 User's Configuration Guide - Page 826

FIP Snooping The FCoE Initialization Protocol (FIP) is used to perform the functions of FC_BB_E device discovery, initialization, and maintenance. FIP uses a separate EtherType from FCoE to distinguish discovery, initialization, and maintenance traffic from other FCoE traffic. FIP frames are standard Ethernet size (1518 Byte 802.1q frame), whereas FCoE frames are a maximum of 2240 bytes. FIP Snooping is supported on the PC80xx switches. FIP snooping is a frame inspection method used by FIP Snooping Bridges to monitor FIP frames and apply policies based upon the L2 header information in those frames. FIP snooping allows for: • Auto configuration of Ethernet ACLs based on information in the Ethernet headers of FIP frames. • Emulation of FC point-to-point links within the DCB Ethernet network. • Enhanced FCoE security/robustness by preventing FCoE MAC spoofing. The role of FIP snooping-enabled ports on the switch falls under one of the following types: • Perimeter or Edge port (connected directly to a Fibre Channel end node or ENode). • Fibre Channel forwarder (FCF) facing port (that receives traffic from FCFs targeted to the ENodes). NOTE: The PowerConnect 8024/8024F FIP Snooping Bridge feature supports the configuration of the perimeter port role and FCF-facing port roles and is intended for use only at the edge of the switched network. The default port role in an FCoE-enabled VLAN is as a perimeter port. FCFfacing ports are configured by the user. Enabling and Disabling FIP Snooping When FIP snooping is globally enabled on the switch, FC-BB-5 Annex D ACLs are installed on the switch, and FIP frames are snooped. FIP snooping will not allow FIP or FCoE frames to be forwarded over a port until the port is operationally enabled for PFC. VLAN tagging must be enabled on the interface in order to carry the dot1p values through the network. Establishing 826 Configuring Data Center Bridging Features