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Configure 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 fabric login (FLOGI) request/response and
confirmed use of the configured FC-MAP value for the VLAN.
FLOGI and fabric discovery (FDISC) request/response packets are trapped to the CPU. They are forwarded
after the necessary ACLs are installed.
Impact on Other Software Features
When you enable FIP snooping on a switch, other software features are impacted. The following table
lists the impact of FIP snooping.
Table 20. Impact of Enabling FIP Snooping
Impact Description
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 Restrictions
The following restrictions apply when you configure FIP snooping.
• The maximum number of FCoE VLANs supported on the switch is eight.
• The maximum number of FIP snooping sessions supported per ENode server is 32. To increase the
maximum number of sessions to 64, use the fip-snooping max-sessions-per-enodemac
command.
• The maximum number of FCFs supported per FIP snooping-enabled VLAN is twelve.
Configuring FIP Snooping
You can enable FIP snooping globally on all FCoE VLANs on a switch or on an individual FCoE VLAN.
By default, FIP snooping is disabled.
FCoE Transit
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