Dell PowerEdge XL 5133-4 MXL 10/40GbE Switch IO Module FTOS Command Reference - Page 112
FIP Snooping on VLANs, FC-MAP Value, Bridge-to-FCF Links, Impact on other Software Features
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www.dell.com | support.dell.com FIP Snooping on VLANs FIP snooping is enabled globally on an Aggregator on all 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. • At least one interface is auto-configured for FCF (FIP snooping bridge-FCF) mode on a FIP snooping-enabled VLAN. Multiple FCF trusted interfaces are auto-configured in a VLAN. • A maximum of eight VLANS are supported for FIP snooping on an Aggregator. FIP snooping processes FIP packets in traffic only from the first eight incoming VLANs. FC-MAP Value The FC-MAP value that is applied globally by the Aggregator on all FCoE VLANs to authorize FCoE traffic is auto-configured. The FC-MAP value is used to check the FC-MAP value for the MAC address assigned to ENodes in incoming FCoE frames. If the FC-MAP value does not match, FCoE frames are dropped. A session between an ENode and an FCF is established by the switch-bridge only when the FC-MAP value on the FCF matches the FC-MAP value on the FIP snooping bridge. Bridge-to-FCF Links A port directly connected to an FCF is auto-configured in FCF mode. Initially, all FCoE traffic is blocked; only FIP frames are allowed to pass. FCoE traffic is allowed on the port only after a successful FLOGI request/response and confirmed use of the configured FC-MAP value for the VLAN. Impact on other Software Features FIP snooping affects other software features on an Aggregator as follows: • MAC address learning: MAC address learning is not performed on FIP and FCoE frames, which are denied by ACLs dynamically created by FIP snooping on server-facing ports in ENode mode. • MTU auto-configuration: MTU size is set to mini-jumbo (2500 bytes) when a port is in Switchport mode, the FIP snooping feature is enabled on the switch, and FIP snooping is enabled on all or individual VLANs. • Link aggregation group (LAG): FIP snooping is supported on port channels on ports on which PFC mode is on (PFC is operationally up). 98 | FIP Snooping