White Papers

Table Of Contents
Table 26. 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 on an NPIV Proxy Gateway
When you configure 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 traffic is sent, use an FCoE map. FIP snooping is automatically configured on
the FCoE VLAN specified 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 configure an S5000 switch as an NPIV proxy gateway, only the fip-snooping max-sessions-
per-enodemac command is supported to configure 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-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
FCoE Transit 303