Users Guide

• 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.

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 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.

• Atleast 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 values 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 in server-facing ports in ENode mode.

FIP Snooping