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Article Number: 000102901

Dell Networking SmartFabric OS10 How to Set Up Virtual Link Trunking

Summary: Dell Networking SmartFabric OS10 How to set up Virtual Link Trunking (VLT)

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Article Content

Instructions

The steps in this article are applicable to switches running OS10 that support Virtual Link Trunking. This article does not contain the requirements for VLT, such as running the same software version. It is recommended to verify the requirements for VLT before implementing these steps.

For OS9 configuration, see How to set up Virtual Link Trunking (VLT) on Dell Networking OS9 Force10 Switches.


Note: Additional information can be found in Dell Networking SmartFabric OS10: Getting Started and Basics Guide
 
Note: Switch stacking is not supported in OS10. Virtual Link Trunking aggregates two identical physical switches to form a single logical extended switch. This single logical entity ensures high availability and high resilience for all its connected access, core switches, and clients.


VLT Configuration Overview

Spanning Tree on the VLT peer switches

Spanning tree is enabled by default and recommended to prevent loops in the VLT domain. Rapid per-vlan spanning-tree (RPVST) (default) and rapid spanning-tree protocol (RSTP) modes are supported on VLT ports.

OS10# configure terminal 
OS10(config)# spanning-tree mode rstp [or] rapid-pvst
 

Create a VLT Domain and Configure the VLT interconnect (VLTi)

OS10# configure terminal
 Enter configuration mode. 
OS10(config)# interface range ethernet 1/1/1-1/1/2
 Enter interface configuration mode 
OS10(conf-range-eth1/1/1-1/1/2)# no switchport
 Remove switchport from the VLTi ports. 
OS10(config)# vlt-domain 1
 Create a VLT domain by configuring the same domain ID on each peer.   
OS10(conf-vlt-1)# discovery-interface ethernet 1/1/1  
 Set the VLTi interfaces.  
OS10(conf-vlt-1)# discovery-interface ethernet 1/1/2  
 Set the VLTi interfaces. 

 

Configure the VLT Priority, VLT MAC Address, and VLT Backup Link

OS10# configure terminal 
 Enter configuration mode. 
OS10(config)# vlt-domain 1  
 Enter VLT domain configuration mode. 
OS10(conf-vlt-1)# primary-priority 4096 (primary peer)
OS10(conf-vlt-1)# primary-priority 8192 (secondary peer)  
 Specify the VLT priority for each peer switch. 
OS10(conf-vlt-1)# vlt-mac 00:11:22:33:44:55   
 Specify the VLT MAC address with a unique MAC address.   
OS10(conf-vlt-1)# backup destination 1.1.1.2 (primary peer)
OS10(conf-vlt-1)# backup destination 1.1.1.1 (secondary peer)  
 Specify the management IP address of the peer switch.   
This sets up the Heartbeat that monitors system up.   
 
Note: Each VLT domain in the network must use a separate unique MAC address. This MAC address must be the same on both switches in the VLT Domain. 

 

Configure a LAG for a connected end device

The following example uses Ethernet 1/1/10 on both VLT peers, in a LACP Port-Channel, to connect to one end device. 
  
OS10# configure terminal 
 Enter configuration mode. 
OS10(config)# interface port-channel  5 
 Specify the LAG to the end device. Use the same LAG number on both peers.   
OS10(conf-if-po-5)# vlt-port-channel 5
 Specify the LAG as VLT.   
OS10(conf-if-po-5)# exit
 Exit 
OS10(config)# interface ethernet 1/1/10
Enter interface configuration mode. 
OS10(conf-if-eth1/1/10)# channel-group 5 mode active
Specify the LAG on the port.  
 
Verify that the port channel is Up: 
OS10# show vlt 1 vlt-port-detail
VLT port channel ID : 5
VLT Unit ID    Port-Channel        Status      Configured ports     Active ports
----------------------------------------------------------------------------------
*1             port-channel5         up              1                   1
2              port-channel5         up              1                   1
 

Verifying and Monitoring

OS10# show vlt 1
Domain ID                   : 1
Unit ID                         : 1
Role                            : primary
Version                       : 1.0
Local System MAC address   : 90:b1:1c:f4:xx:xx
VLT MAC address           :  00:11:22:33:44:55 
IP address                       : fda5:74c8:xxxx:1::1
Delay-Restore timer        : 1000 seconds
Peer-Routing                   : Disabled
Peer-Routing-Timeout timer  : 0 seconds
VLTi Link Status
port-channel1000          : up
                                 
VLT Peer Unit ID  System MAC Address  Status  IP Address           Version
--------------------------------------------------------------------------
 2               90:b1:1c:f4:xx:xx   up      fda5:74c8:xxxx:1::2   1.0


OS10# show vlt 1 mismatch
          Peer-routing mismatch:
          No mismatch                
          VLAN mismatch:
          No mismatch        
          VLT VLAN mismatch:
          No mismatch


OS10# show running-configuration vlt
!
vlt domain 1
discovery-interface ethernet 1/1/1
discovery-interface ethernet 1/1/2
primary-priority 4096
vlt-mac 00:11:22:33:44:55 
backup destination 1.1.1.2
!
interface port-channel 5
vlt-port-channel 5

For more information about VLT or any additional SmartFabric OS10 configuration, see the User Guide for the relevant version on the SmartFabric OS10 Software Documentation page.

Article Properties

Affected Product
PowerSwitch S3048-ON, PowerSwitch S4048-ON, Software Defined Networking, Dell EMC Networking N3200-ON, PowerSwitch S4048T-ON, PowerSwitch S4112F-ON/S4112T-ON, PowerSwitch S4128F-ON/S4128T-ON, PowerSwitch S4148F-ON/S4148T-ON/S4148FE-ON , PowerSwitch S4148U-ON, PowerSwitch S4248FB-ON /S4248FBL-ON, PowerSwitch S5212F-ON, PowerSwitch S5224F-ON, PowerSwitch S5232F-ON, PowerSwitch S5248F-ON, PowerSwitch S5296F-ON, PowerSwitch S5448F-ON, PowerSwitch S6010-ON, PowerSwitch Z9100-ON, PowerSwitch Z9264F-ON, PowerSwitch Z9332F-ON, PowerSwitch Z9432F-ON, PowerSwitch Z9664F-ON, SmartFabric OS10 Software ...
Last Published Date

22 Mar 2024

Version

9

Article Type

How To

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