Configuring A Port For A Bridge-To-Fcf Link; Impact On Other Software Features; Fip Snooping Prerequisites - Dell Force10 MXL Blade Configuration Manual

Configuring a Port for a Bridge-to-FCF Link

If a port is directly connected to an FCF, configure the port mode as FCF. 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

When you enable FIP snooping on a switch, other software features are impacted 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).
• STP: If you enable an STP protocol (STP, RSTP, PVSTP, or MSTP) on the switch and ports enter a
blocking state, when the state change occurs, the corresponding port-based ACLs are deleted. If a port
is enabled for FIP snooping in ENode or FCF mode, the ENode/FCF MAC-based ACLs are deleted.

FIP Snooping Prerequisites

Before you configure FIP snooping on an MXL switch, ensure that the following conditions are met:
• A FIP snooping bridge requires DCBX and PFC to be enabled on the switch for lossless Ethernet
connections (refer to
is recommended but not required.
If you enable DCBX and PFC mode is on (PFC is operationally up) in a port configuration, FIP snoop-
ing is operational on the port. If the PFC parameters in a DCBX exchange with a peer are not synchro-
nized, FIP and FCoE frames are dropped on the port after you enable the FIP snooping feature.
• VLAN membership:
• You must create the VLANs on the switch which handles FCoE traffic (
• You must configure each FIP snooping port to operate in Hybrid mode so that it accepts both
tagged and untagged VLAN frames (
• You must configure tagged VLAN membership on each FIP snooping port that sends and receives
FCoE traffic and has links with an FCF, ENode server, or another FIP snooping bridge (
port-type slot/port command).
The default VLAN membership of the port should continue to operate with untagged frames. FIP
snooping is not supported on a port that is configured for non-default untagged VLAN member-
ship.
Data Center Bridging (DCB)). Dell recommends that you also enable ETS; ETS
portmode hybrid
interface vlan
command).
command).
tagged
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