Users Guide

Table 28. 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 by default and the
maximum number of sessions you can configure is 64. 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.
• The maximum number of FCoE VLANs supported on the switch is eight.
• The maximum number of FIP snooping sessions (including NPIV sessions) supported per ENode
server is 16
• Links to other FIP snooping bridges on a FIP snooping-enabled port (bridge-to-bridge links) are not
supported on the switch.
• fip-snooping port-mode fcf/fcoe-trusted CLI is not allowed on cascade, extended ports, or a LAG
which contains these ports.
• fip-snooping enable/fip-snooping fc-map CLIs are not allowed on VLAN interfaces which has
cascade or extended port as one of its members either directly or indirectly via LAG.
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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