Dell PowerEdge XL 5133-4 MXL 10/40GbE Switch IO Module FTOS Command Reference - Page 111
FIP Snooping in a Switch Stack, How FIP Snooping is Implemented
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The following sections describe how to configure the FIP snooping feature on a switch that functions as a FIP snooping bridge so that it can perform the following functions: • Perform FIP snooping (allowing and parsing FIP frames) globally on all VLANs or on a per-VLAN basis. • Set the FCoE MAC address prefix (FC-MAP) value used by an FCF to assign a MAC address to an FCoE end-device (server ENode or storage device) after a server successfully logs in. • Set the FCF mode to provide additional port security on ports that are directly connected to an FCF. • Check FIP snooping-enabled VLANs to ensure that they are operationally active. • Process FIP VLAN discovery requests and responses, advertisements, solicitations, FLOGI/FDISC requests and responses, FLOGO requests and responses, keep-alive packets, and clear virtual-link messages. FIP Snooping in a Switch Stack FIP snooping supports switch stacking as follows: • A switch stack configuration is synchronized with the standby stack unit. • Dynamic population of the FCoE database (ENode, Session, and FCF tables) is synchronized with the standby stack unit. The FCoE database is maintained by snooping FIP keep-alive messages. • In case of a failover, the new master switch starts the required timers for the FCoE database tables. Timers run only on the master stack unit. Note: As a best practice, Dell Force10 recommends that you do not configure FIP Snooping on a stacked Aggregator. How FIP Snooping is Implemented As soon as the Aggregator is activated in an M1000e chassis as a switch-bridge, existing VLAN-specific and FIP snooping auto-configurations are applied. The Aggregator snoops FIP packets on VLANs enabled for FIP snooping and allows legitimate sessions. By default, all FCoE and FIP frames are dropped unless specifically permitted by existing FIP snooping-generated ACLs. FIP Snooping | 97