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This chapter describes how to configure virtual Ethernet (vEthernet or vEth) interfaces.
This chapter includes the following sections:
•Information About vEthernet Interfaces
•Configuring vEthernet Interfaces
•Verifying the vEthernet Interface Configuration
•Monitoring the vEthernet Interface Configuration
•Configuration Examples for vEthernet Interfaces
•Feature History for vEthernet Interfaces
Virtual Ethernet (vEthernet or vEth) interfaces are logical interfaces. Each vEthernet interface corresponds to a switch interface that is connected to a virtual port. The interface types are as follows:
•VM (interfaces connected to VM NICs)
•Service console
•vmkernel
vEthernet interfaces are created on the Cisco Nexus 1000V to represent virtual ports in use on the distributed virtual switch.
vEthernet interfaces are mapped to connected ports by MAC address as well as DVPort number. When a server administrator changes the port profile assignment on a vNIC or hypervisor port, the same vEthernet interface is reused. This is a change in Release 4.2(1)SV1(4a). In previous releases, the VSM assigned a new vEthernet interface.
When bringing up a vEthernet interface where a change in the port profile assignment is detected, the VSM automatically purges any manual configuration present on the interface. You can use the following command to prevent purging of the manual configuration:
no svs veth auto-config-purge
vEthernet interface configuration has the following guideline and limitation:
•MTU cannot be configured on a vEthernet interface.
The following table lists the default settings for vEthernet interface configuration.
This section includes the following topics:
•Configuring Global vEthernet Properties
•Configuring a vEthernet Access Interface
•Configuring a Private VLAN on a vEthernet Interface
•Enabling or Disabling a vEthernet Interface
You can use this procedure to enable or disable the following automatic controls for vEthernet interfaces:
•Deleting unused vEthernet interfaces
•Purging of manual vEthernet configurations
•Creating vEthernet interfaces
Before beginning this procedure, you must know or do the following:
•You are logged in to the CLI in EXEC mode.
1. config t
2. (Optional) [no] svs veth auto-delete
3. (Optional) [no] svs veth auto-config-purge
4. (Optional) [no] svs veth auto-setup
5. show running-config all | grep "svs-veth"
6. copy running-config startup-config
You can use this procedure to configure a vEthernet interface for use as an access interface.
Before beginning this procedure, you must know or do the following:
•You are logged into the CLI in EXEC mode.
•If you do not add a description to the vEthernet interface, then one of the following descriptions is added at attach time. If you add a description and then remove it using the no description command, then one of the following descriptions is added to the interface:
–For a VM—VM-Name, Network Adapter number
–For a VMK—VMware VMkernel, vmk number
–For a VSWIF—VMware Service Console, vswif number
1. config t
2. interface vethernet interface-number
3. (Optional) description string
4. switchport access vlan vlan-id
5. switchport mode access
6. show interface interface-number
7. copy running-config startup-config
You can use this procedure to configure a private VLAN (PVLAN) on a vEthernet interface.
Before beginning this procedure, you must know or do the following:
•You are logged into the CLI in EXEC mode.
1. config t
2. interface vethernet interface-number
3. (Optional) description string
4. switchport access vlan vlan-id
5. switchport mode private-vlan host
6. switchport private-vlan host-association primary-vlan-id
7. show interface
8. copy running-config startup-config
The following example shows how to configure a vEthernet interface to use in a private vlan:
n1000v# config t
n1000v(config)# interface vethernet 1
n1000v(config-if)# switchport access vlan 5
n1000v(config-if)# switchport mode private-vlan host
n1000v(config-if)# switchport private-vlan host-association 5
n1000v(config-if)# show interface vethernet 1
Vethernet1 is up
Port description is gentoo, Network Adapter 1
Hardware is Virtual, address is 0050.5687.3bac
Owner is VM "gentoo", adapter is Network Adapter 1
Active on module 4
VMware DVS port 1
Port-Profile is vm
Port mode is access
5 minute input rate 1 bytes/second, 0 packets/second
5 minute output rate 94 bytes/second, 1 packets/second
Rx
655 Input Packets 594 Unicast Packets
0 Multicast Packets 61 Broadcast Packets
114988 Bytes
Tx
98875 Output Packets 1759 Unicast Packets
80410 Multicast Packets 16706 Broadcast Packets 0 Flood Packets
6368452 Bytes
0 Input Packet Drops 0 Output Packet Drops
You can use this procedure to enable or disable a vEthernet interface.
1. config t
2. interface vethernet interface-number
3. [no] shutdown
4. show interface
5. copy running-config startup-config
Before beginning this procedure, you must know or do the following:
•You are logged into the CLI in EXEC mode.
The following example shows how to enable a vEthernet interface:
n1000v# config t
n1000v(config)# interface vethernet 100
n1000v(config)# no shutdown
n1000v(config-if)# show interface veth100 status
--------------------------------------------------------------------------------
Port Name Status Vlan Duplex Speed Type
--------------------------------------------------------------------------------
Veth100 -- up 1 auto auto --
n1000v(config-if)#
You can use the following commands to display the vEthernet interface configuration:
The following example shows how to display vEthernet 1:
n1000v# show interface veth1
Vethernet1 is up
Port description is gentoo1, Network Adapter 1
Hardware is Virtual, address is 0050.56bd.42f6
Owner is VM "gentoo1", adapter is Network Adapter 1
Active on module 33
VMware DVS port 100
Port-Profile is vlan48
Port mode is access
Rx
491242 Input Packets 491180 Unicast Packets
7 Multicast Packets 55 Broadcast Packets
29488527 Bytes
Tx
504958 Output Packets 491181 Unicast Packets
1 Multicast Packets 13776 Broadcast Packets 941 Flood Packets
714925076 Bytes
11 Input Packet Drops 0 Output Packet Drops
n1000v#
The following example shows how to display information for all vEthernet interfaces:
n1000v# show interface virtual
--------------------------------------------------------------------------------
Port Adapter Owner Mod Host
--------------------------------------------------------------------------------
Veth1 Vm1-kl61 2
Veth2 VM1-kl65 5
Veth3 VM2-kl61 2
Veth1 Net Adapter 1 austen-gentoo1 33 austen-strider.austen.
Veth2 Net Adapter 2 austen-gentoo1 33 austen-strider.austen.
n1000v#
The following example shows how to display the descriptions for all vEthernet interfaces:
n1000v# show interface virtual description
--------------------------------------------------------------------------------
Interface Description
--------------------------------------------------------------------------------
Veth1 gentoo1, Network Adapter 1
Veth2 gentoo1, Network Adapter 2
Veth3 VMware VMkernel, vmk1
Veth4 VMware Service Console, vswif1
The following example shows how to display the virtual port mapping for all vEthernet interfaces:
n1000v# show interface virtual port-mapping
-------------------------------------------------------------------------------
Port Hypervisor Port Binding Type Status Reason
-------------------------------------------------------------------------------
Veth1 DVPort5747 static up none
Veth2 DVPort3361 static up none
The following example shows how to display the running configuration information for all vEthernet interfaces:
n1000v# show running-config interface veth1
version 4.2(1)SV1(4)
interface Vethernet1
inherit port-profile vlan48
description gentoo1, Network Adapter 1
vmware dvport 2968 dvswitch uuid "d4 02 20 50 16 4b 36 97-46 09 dc d8 5b c6 1e c1"
vmware vm mac 0050.56A0.0000
You can use the following commands to monitor the vEthernet interface configuration:
The following example shows how to display the counters for all vEthernet interfaces:
n1000v# show interface counters
--------------------------------------------------------------------------------
Port InOctets InUcastPkts InMcastPkts InBcastPkts
--------------------------------------------------------------------------------
mgmt0 42754 -- 0 --
Eth2/2 41423421 112708 125997 180167
Eth5/2 39686276 119152 93284 180100
Eth5/6 4216279 9530 31268 40
Veth1 0 0 0 0
Veth2 0 0 0 0
Veth3 0 0 0 0
Veth4 0 0 0 0
Veth5 0 0 0 0
Veth6 0 0 0 0
Veth7 0 0 0 0
Veth100 0 0 0 0
--------------------------------------------------------------------------------
Port OutOctets OutUcastPkts OutMcastPkts OutBcastPkts
--------------------------------------------------------------------------------
mgmt0 3358 -- -- --
Eth2/2 23964739 116150 516 52768
Eth5/2 26419473 111598 571 52420
Eth5/6 1042930 9548 536 14
Veth1 393589 0 6150 0
Veth2 393600 0 6150 0
Veth3 393600 0 6150 0
Veth4 0 0 0 0
Veth5 0 0 0 0
Veth6 0 0 0 0
Veth7 0 0 0 0
Veth100 0 0 0 0
n1000v#
The following example shows how to configure a vEthernet access interface and assign the access VLAN for that interface:
n1000v# configure terminal
n1000v(config)# interface vethernet 100
n1000v(config-if)# switchport
n1000v(config-if)# switchport mode access
n1000v(config-if)# switchport access vlan 5
n1000v(config-if)#
The following example shows how to configure a Layer 2 trunk interface, assign the native VLAN and the allowed VLANs, and configure the device to tag the native VLAN traffic on the trunk interface:
n1000v# configure terminal
n1000v(config)# interface vethernet 1
n1000v(config-if)# switchport
n1000v(config-if)# switchport mode trunk
n1000v(config-if)# switchport trunk native vlan 10
n1000v(config-if)# switchport trunk allowed vlan 5, 10
n1000v(config-if)#
For additional information related to implementing access and trunk port modes, see the following sections:
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No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature. |
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This section provides the feature history for vEthernet interfaces.