White Papers
FIP Snooping on an NPIV Proxy Gateway
When you congure an S5000 as an NPIV proxy gateway and enable Fibre Channel capability, FIP snooping is automatically enabled on all
VLANs using the default FIP snooping settings.
To identify the SAN fabric to which FCoE storage trac is sent, use an FCoE map. FIP snooping is automatically congured on the FCoE
VLAN specied in the FCoE map using the FC-MAP parameter in the map:
• When you apply an FCoE map to a server-facing Ethernet interface in ENode port mode
• When you apply an FCoE map to a fabric-facing FC interface
NOTE: When you congure an S5000 switch as an NPIV proxy gateway, only the fip-snooping max-sessions-per-
enodemac command is supported to congure FIP snooping.
For more information, refer to
NPIV Proxy Gateway.
FIP Snooping in an S5000 Stack
FIP snooping is not supported on stack units in an S5000 stack.
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 27. 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-conguration 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 congure FIP snooping.
• The maximum number of FCoE VLANs supported:
• on an S5000 NPIV proxy gateway is 12.
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FCoE Transit