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This chapter contains the following sections:
Cisco Nexus devices support Fibre Channel over Ethernet (FCoE), which allows Fibre Channel and Ethernet traffic to be carried on the same physical Ethernet connection between the switch and the servers.
The Fibre Channel portion of FCoE is configured as a virtual Fibre Channel interface. Logical Fibre Channel features (such as interface mode) can be configured on virtual Fibre Channel interfaces.
FCoE VLANs and Virtual Fiber Channel (vFC) interfaces have these guidelines and limitations:
Each vFC interface must be bound to an FCoE-enabled Ethernet or EtherChannel interface or to the MAC address of a remotely connected adapter. FCoE is supported on 10-Gigabit, 25-Gigabit, 40-Gigabit, and 100-Gigabit Ethernet interfaces.
A virtual Fibre Channel interface must be bound to an interface before it can be used. The binding is to a physical Ethernet interface (when the converged network adapter (CNA) is directly connected to the Cisco Nexus device), a MAC address (when the CNA is remotely connected over a Layer 2 bridge), or an EtherChannel.
The Ethernet or EtherChannel interface that you bind to the vFC interface must be configured as follows:
The Ethernet or EtherChannel interface must be a trunk port (use the switchport mode trunk command).
The FCoE VLAN that corresponds to a vFC’s VSAN must be in the allowed VLAN list.
Set the MTU 9216 and QoS polices to the interface. You can use default (service-policy type qos input default-fcoe-in-policy) or custom QoS policies.
You must not configure an FCoE VLAN as the native VLAN of the trunk port.
 Note |
The native VLAN is the default VLAN on a trunk. Any untagged frames transit the trunk as native VLAN traffic. |
You should use an FCoE VLAN only for FCoE.
Do not use the default VLAN, VLAN1, as an FCoE VLAN.
You must configure the Ethernet interface as PortFast (use the spanning-tree port type edge trunk command).
Note |
You are not required to configure trunking on the server interface even if the switch interface is configured with trunking enabled. All non-FCoE traffic from the server is passed on the native VLAN. |
The vFC interface can be bound to Ethernet port channels with multiple member ports connected to FCoE Initialization Protocol (FIP) snooping bridges.
Each vFC interface is associated with only one VSAN.
You must map any VSAN with associated vFC interfaces to a dedicated FCoE-enabled VLAN.
FCoE is not supported on private VLANs.
If the converged access switches (in the same SAN fabric or in another) need to be connected to each other over Ethernet links for a LAN alternate path, then you must explicitly configure such links to exclude all FCoE VLANs from membership.
You must use separate FCoE VLANs for FCoE in SAN-A and SAN-B fabrics.
FCoE connectivity to pre-FIP CNAs over virtual port channels (vPCs) is not supported.
Note |
Virtual interfaces are created with the administrative state set to down. You must explicitly configure the administrative state to bring the virtual interface into operation. |
Configuring Virtual Interfaces
A unique, dedicated VLAN must be configured at every converged access switch to carry traffic for each VSAN in the SAN (for example, VLAN 1002 for VSAN 1, VLAN 1003 for VSAN 2, and so on). If Multiple Spanning Tree (MST) is enabled, a separate MST instance must be used for FCoE VLANs.
| Command or Action | Purpose | |
|---|---|---|
|
Step 1 |
switch# configure terminal |
Enters global configuration mode. |
|
Step 2 |
switch(config)# vlan vlan-id |
Enters VLAN configuration mode. The VLAN number range is from 1 to 4096. |
|
Step 3 |
switch(config-vlan)# fcoe [vsan vsan-id] |
Enables FCoE for the specified VLAN. If you do not specify a VSAN number, a mapping is created from this VLAN to the VSAN with the same number. Configures the mapping from this VLAN to the specified VSAN. |
|
Step 4 |
switch(config-vlan)# exit |
Exits VLAN configuration mode. You must exit this mode to execute the configured commands on your Cisco Nexus device. |
|
Step 5 |
(Optional) switch(config)# show vlan fcoe |
(Optional)
Displays information about the FCoE configuration for a VLAN. |
|
Step 6 |
(Optional) switch(config-if)# copy running-config startup-config |
(Optional)
Saves the change persistently through reboots and restarts by copying the running configuration to the startup configuration. |
This example shows how to map VLAN 200 to VSAN 2:
switch(config)# vlan 200switch(config-vlan)# fcoe vsan 2You can create a virtual Fibre Channel interface. You must bind the virtual Fibre Channel interface to a physical interface before it can be used.
| Command or Action | Purpose | |
|---|---|---|
|
Step 1 |
switch# configure terminal |
Enters global configuration mode. |
|
Step 2 |
switch(config)# interface vfc vfc-id |
Creates a virtual Fibre Channel interface (if it does not already exist) and enters interface configuration mode. The virtual Fibre Channel interface ID range is from 1 to 8192. |
|
Step 3 |
switch(config-if)# bind {interface {ethernet slot/port | port-channel channel-number} | mac-address MAC-address} |
Binds the virtual Fibre Channel interface to the specified interface. |
|
Step 4 |
(Optional) switch(config-if)# no bind {interface {ethernet slot/port | port-channel channel-number} | mac-address MAC-address} |
(Optional)
Unbinds the virtual Fibre Channel interface from the specified interface. |
|
Step 5 |
(Optional) switch(config)# no interface vfc vfc-id |
(Optional)
Deletes a virtual Fibre Channel interface. |
This example shows how to bind a virtual Fibre Channel interface to an Ethernet interface:
switch# configure terminal
switch(config)# interface vfc 4
switch(config-if)# bind interface ethernet 1/4
This example shows how to bind a virtual Fibre Channel interface to port-channel.:
switch# configure terminal
switch(config)# interface vfc 3
switch(config-if)# bind interface port-channel 1
This example shows how to bind a virtual Fibre Channel interface to a MAC address:
switch# configure terminal
switch(config)# interface vfc 2
switch(config-if)# bind mac-address 00:0a:00:00:00:36
This example shows how to delete a virtual Fibre Channel interface:
switch# configure terminal
switch(config)# no interface vfc 4
This example shows how to unbind a virtual Fibre Channel interface from an ethernet interface:
switch# configure terminal
switch(config)# int vfc17
switch(config-if)# no bind interface ethernet 1/17
switch(config-if)# exit
A unique, dedicated VLAN must be configured at every converged access switch to carry traffic for each Virtual Fabric (VSAN) in the SAN (for example, VLAN 1002 for VSAN 1, VLAN 1003 for VSAN 2, and so on). If MST is enabled, a separate MST instance must be used for FCoE VLANs.
| Command or Action | Purpose | |
|---|---|---|
|
Step 1 |
switch# configure terminal |
Enters global configuration mode. |
|
Step 2 |
switch(config)# vsan database |
Enters VSAN configuration mode. |
|
Step 3 |
switch(config-vsan)# vsan vsan-id interface vfc vfc-id |
Configures the association between the VSAN and virtual Fibre Channel interface. The VSAN number must map to a VLAN on the physical Ethernet interface that is bound to the virtual Fibre Channel interface. |
|
Step 4 |
(Optional) switch(config-vsan)# no vsan vsan-id interface vfc vfc-id |
(Optional)
Disassociates the connection between the VSAN and virtual Fibre Channel interface. |
This example shows how to associate a virtual Fibre Channel interface to a VSAN:
switch# configure terminalswitch(config)# vsan databaseswitch(config-vsan)# vsan 2 interface vfc 4You can create a virtual Fibre Channel (vFC), and implicitly bind it to an Ethernet interface or a port-channel using a single command. For this, the vFC identifier must match the Ethernet interface or port-channel identifier. The Ethernet interface can be a module (slot or port) interface (slot/QSFP-module/port).
Ensure you have installed the correct license for FCoE.
Ensure you have enabled FCoE.
|
Step 1 |
Enter global configuration mode: switch# configure terminal |
|
Step 2 |
Create a VFC (if it does not already exist): Additionally, vfc slot/port binds the vFC to an Ethernet slot/port interface. The vFC slot/QSFP-module/port binds the vFC to a breakout interface. switch(config) # interface vfc {id | slot/port | slot/QSFP-module/port } |
|
Step 3 |
Bring up the vFC interface: switch(config-if) # no shutdown |
|
Step 4 |
Exit the interface configuration mode: switch(config-if) # exit |
This example shows how to implicitly bind a virtual Fibre Channel interface to an Ethernet interface:
switch# configure terminal
switch(config)# interface eth1/11
switch(config-if)# switchport mode trunk
switch(config-if)# mtu 9216
switch(config-if)# service-policy type qos input default-fcoe-in-policy
switch(config-if)# no shutdown
switch(config)# interface vfc1/11
switch(config-if)# no shutdown
switch(config-if)# exit
switch(config)#
switch(config)# vsan database
switch(config-vsan-db)# vsan 10
switch(config-vsan-db)# exit
switch(config)#
switch(config)# vlan 10
switch(config-vlan)# fcoe vsan 10
switch(config-vlan)# exit
switch(config)#
switch(config)# vsan database
switch(config-vsan-db)# vsan 10 interface vfc1/11
switch(config-vsan-db)# exit
switch(config)#
switch(config)# show interface vfc1/11
vfc1/11 is trunking (Not all VSANs UP on the trunk)
Bound interface is Ethernet1/11
Hardware is Ethernet
Port WWN is 20:0b:00:de:fb:9d:0e:a0
Admin port mode is F, trunk mode is on
snmp link state traps are enabled
Port mode is TF
Port vsan is 10
Operating Speed is 10 Gbps
Admin Speed is auto
Trunk vsans (admin allowed and active) (1,10)
Trunk vsans (up) (10)
Trunk vsans (isolated) ()
Trunk vsans (initializing) (1)
11 fcoe in packets
1692 fcoe in octets
0 fcoe out packets
0 fcoe out octets
Interface last changed at Mon Dec 16 09:03:33 2019
switch(config)#
|
Step 1 |
Enter global configuration mode: switch# configure terminal |
|
Step 2 |
Create a vFC that implicitly binds to the Ethernet port-channel based on its number: The port number range is from 1 to 4096. switch(config) # interface vfc-port-channel port number |
|
Step 3 |
Bring up the vFC port: switch(config-if) # no shutdown |
|
Step 4 |
Exit from the current interface configuration mode: switch(config-if) # exit |
The example shows how you can create a vFC-port-channel that implicitly binds to Ethernet port-channel:
switch# configure terminal
switch(config)# interface port-channel 10
switch(config-if)# switchport
switch(config-if)# switchport mode trunk
switch(config-if)# mtu 9216
switch(config-if)# service-policy type qos input default-fcoe-in-policy
switch(config-if)# no shutdown
switch(config-if)# exit
switch(config)# interface eth1/49
switch(config-if)# channel-group 10 force
switch(config-if)# no shutdown
switch(config-if)# exit
switch# configure terminal
switch(config)# interface vfc-port-channel 10
switch(config-if)# no shutdown
switch(config-if)# exit
switch(config)# vlan 10
switch(config-vlan)# fcoe vsan 10
switch(config-vlan)# exit
switch(config)#
switch(config)# vsan database
switch(config-vsan-db)# vsan 10 interface vfc-port-channel 10
switch(config-vsan-db)# exit
switch(config)# show interface vfc-port-channel 10
vfc-po10 is trunking (Not all VSANs UP on the trunk)
Bound interface is port-channel10
Hardware is Ethernet
Port WWN is 25:1b:00:de:fb:9d:0e:a0
Admin port mode is F, trunk mode is on
snmp link state traps are enabled
Port mode is TF
Port vsan is 10
Operating Speed is 40 Gbps
Admin Speed is auto
Trunk vsans (admin allowed and active) (1,10)
Trunk vsans (up) (10)
Trunk vsans (isolated) ()
Trunk vsans (initializing) (1)
11 fcoe in packets
1236 fcoe in octets
0 fcoe out packets
0 fcoe out octets
Interface last changed at Mon Dec 16 08:56:13 2019
To display configuration information about virtual interfaces, perform one of the following tasks:
|
Command |
Purpose |
|---|---|
| switch# show interface vfc vfc-id |
Displays the detailed configuration of the specified Fibre Channel interface. |
| switch# show interface brief |
Displays the status of all interfaces. |
| switch# show vlan fcoe |
Displays the mapping of FCoE VLANs to VSANs. |
This example shows how to display a virtual Fibre Channel interface bound to an Ethernet interface:
switch# show interface vfc 11vfc11 is trunking (Not all VSANs UP on the trunk)
Bound interface is Ethernet1/11
Hardware is Ethernet
Port WWN is 20:0a:00:de:fb:9d:0e:df
Admin port mode is F, trunk mode is on
snmp link state traps are enabled
Port mode is TF
Port vsan is 10
Operating Speed is 10 Gbps
Admin Speed is auto
Trunk vsans (admin allowed and active) (1,10)
Trunk vsans (up) (10)
Trunk vsans (isolated) ()
Trunk vsans (initializing) (1)
2 fcoe in packets
152 fcoe in octets
0 fcoe out packets
0 fcoe out octets
Interface last changed at Wed Dec 18 10:36:58 2019This example shows how to display a virtual Fibre Channel interface bound to a MAC address:
switch# show interface vfc 11
vfc11 is trunking (Not all VSANs UP on the trunk)
Bound MAC is 0090.faf8.7513
Hardware is Ethernet
Port WWN is 20:0a:00:de:fb:9d:0e:df
Admin port mode is F, trunk mode is on
snmp link state traps are enabled
Port mode is TF
Port vsan is 10
Operating Speed is 10 Gbps
Admin Speed is auto
Trunk vsans (admin allowed and active) (1,10)
Trunk vsans (up) (10)
Trunk vsans (isolated) ()
Trunk vsans (initializing) (1)
3 fcoe in packets
228 fcoe in octets
0 fcoe out packets
0 fcoe out octets
Interface last changed at Mon Dec 16 09:09:02 2019This example shows how to display the status of all the interfaces on the switch (some output has been removed for brevity):
switch# show interface brief
--------------------------------------------------------------------------------
Port VRF Status IP Address Speed MTU
--------------------------------------------------------------------------------
mgmt0 -- up 9.9.9.9 1000 1500
--------------------------------------------------------------------------------
Ethernet VLAN Type Mode Status Reason Speed Port
Interface Ch #
--------------------------------------------------------------------------------
Eth1/1 1 eth trunk up none 100G(D) 1
Eth1/2 1 eth trunk up none 100G(D) 1
Eth1/3 -- eth routed down Administratively down auto(D) --
Eth1/4 -- eth routed down XCVR not inserted auto(D) --
Eth1/5 -- eth routed down Administratively down auto(D) --
Eth1/6 -- eth routed down Administratively down auto(D) --
Eth1/7 1 eth trunk up none 40G(D) 601
Eth1/8 -- eth routed down XCVR not inserted auto(D) --
Eth1/14 -- eth routed down XCVR not inserted auto(D) --
Eth1/16 -- eth routed down XCVR not inserted auto(D) --
Eth1/17 -- eth routed down XCVR not inserted auto(D) --
Eth1/18/1 1 eth trunk up none 10G(D) 181
Eth1/18/2 1 eth trunk up none 10G(D) 560
Eth1/18/3 1 eth trunk up none 10G(D) 560
Eth1/18/4 1 eth trunk up none 10G(D) 560
Eth1/19 -- eth routed down Administratively down auto(D) --
Eth1/20 -- eth routed down Administratively down auto(D) --
Eth1/21 -- eth routed down XCVR not inserted auto(D) --
Eth1/22 -- eth routed down XCVR not inserted auto(D) --
Eth1/23 -- eth routed down XCVR not inserted auto(D) --
Eth1/24 -- eth routed down XCVR not inserted auto(D) --
Eth1/25 1 eth trunk up none 100G(D) 2500
Eth1/26 1 eth trunk up none 40G(D) 26
Eth1/27 -- eth routed down XCVR not inserted auto(D) --
Eth1/28 -- eth routed down XCVR not inserted auto(D) --
Eth1/29 -- eth routed down XCVR not inserted auto(D) --
Eth1/31 1 eth trunk up none 40G(D) 559
Eth1/32 -- eth routed down XCVR not inserted auto(D) --
Eth1/33 -- eth routed down XCVR not inserted auto(D) --
Eth1/34 -- eth routed down XCVR not inserted auto(D) --
Eth1/35 -- eth routed down Administratively down auto(D) --
Eth1/36/1 -- eth routed down Administratively down auto(D) --
Eth1/36/2 -- eth routed down Administratively down auto(D) --
Eth1/36/3 -- eth routed down Administratively down auto(D) --
Eth1/36/4 -- eth routed down Administratively down auto(D) --
------------------------------------------------------------------------------------------
Port-channel VLAN Type Mode Status Reason Speed Protocol
Interface
------------------------------------------------------------------------------------------
Po1 1 eth trunk up none a-100G(D) lacp
Po26 1 eth trunk up none a-40G(D) none
Po181 1 eth trunk up none a-10G(D) none
Po559 1 eth trunk up none a-40G(D) none
Po560 1 eth trunk up none a-10G(D) none
Po601 1 eth trunk up none a-40G(D) none
Po2500 1 eth trunk up none a-100G(D) none
-------------------------------------------------------------------------------
Interface Vsan Admin Admin Status SFP Oper Oper Port
Mode Trunk Mode Speed Channel
Mode (Gbps)
-------------------------------------------------------------------------------
fc1/9/1 1 E on trunking swl TE 8 224
fc1/9/2 1 E on trunking swl TE 8 224
fc1/9/3 1 E on trunking swl TE 8 224
fc1/9/4 1 E on trunking swl TE 8 224
fc1/10/1 1 E on trunking swl TE 8 224
fc1/10/2 1 E on trunking swl TE 8 224
fc1/10/3 1 E on trunking swl TE 8 224
fc1/10/4 1 E on trunking swl TE 8 224
fc1/11/1 1 E on trunking swl TE 8 224
fc1/11/2 1 E on trunking swl TE 8 224
fc1/11/3 1 E on trunking swl TE 8 224
fc1/11/4 1 E on trunking swl TE 8 224
fc1/12/1 1 auto on down swl -- -- --
fc1/12/2 1 auto on down swl -- -- --
fc1/12/3 1 auto on down swl -- -- --
fc1/12/4 1 auto on down swl -- -- --
fc1/13/1 1 E on trunking swl TE 8 225
fc1/13/2 1 E on trunking swl TE 8 225
fc1/13/3 1 E on trunking swl TE 8 225
fc1/13/4 1 E on trunking swl TE 8 225
fc1/15/1 501 auto off up swl F 32 --
fc1/15/2 501 F on trunking swl TF 32 114
fc1/15/3 501 F off up swl F 32 --
fc1/15/4 1 F on trunking swl TF 32 118
fc1/30/1 1 E off notConnected swl -- -- --
fc1/30/2 1 E off notConnected swl -- -- --
fc1/30/3 1 E on trunking swl TE 32 --
fc1/30/4 1 E on notConnected swl -- -- --
-------------------------------------------------------------------------------
Interface Vsan Admin Status Oper Oper IP
Trunk Mode Speed Address
Mode (Gbps)
-------------------------------------------------------------------------------
san-port-channel114 501 on trunking TF 32 --
san-port-channel118 1 on trunking TF 32 --
san-port-channel224 1 on trunking TE 88 --
san-port-channel225 1 on trunking TE 32 --
-------------------------------------------------------------------------------
Interface Vsan Admin Admin Status Bind Oper Oper
Mode Trunk Info Mode Speed
Mode (Gbps)
-------------------------------------------------------------------------------
vfc1 501 F on trunking Ethernet1/26 TF 40
vfc2 501 F on trunking e02f.6d08.cda9 TF auto
vfc560 1 F on trunking port-channel560 TF 30
vfc1/25 501 F on trunking Ethernet1/25 TF 100
-------------------------------------------------------------------------------
Interface Vsan Admin Admin Status Bind Oper Oper
Mode Trunk Info Mode Speed
Mode (Gbps)
-------------------------------------------------------------------------------
vfc-po559 1 F on trunking port-channel559 TF 40
vfc-po601 501 F on trunking port-channel601 TF 40
This example shows how to display the mapping between the VLANs and VSANs on the switch:
switch# show vlan fcoeVLAN VSAN Status-------- -------- --------15 15 Operational20 20 Operational25 25 Operational30 30 Non-operationalThe following example shows how to configure the FCoE VLAN and a virtual Fibre Channel interface:
|
Step 1 |
Enable the associated VLAN and map the VLAN to a VSAN. |
||
|
Step 2 |
Configure the VLAN on a physical Ethernet interface. |
||
|
Step 3 |
Create a virtual Fibre Channel interface and bind it to a physical Ethernet interface.
|
||
|
Step 4 |
Associate the virtual Fibre Channel interface to the VSAN. |
||
|
Step 5 |
(Optional) Display membership information for the VSAN. |
||
|
Step 6 |
(Optional) Display the interface information for the virtual Fibre Channel interface. |
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