Dell PowerStore PowerStore T and Q Networking Guide for Storage Services

Configure Virtual Link Trunking interconnect

Perform the following steps if you have chosen to implement VLT for your Layer 2 interconnectivity between the two Top of the Rack (ToR) PowerSwitch Series.

1. Establish a terminal connection to the first ToR switch (Switch1).
2. Enter global configuration mode.

   configure terminal

3. Disable L2 mode on the 100 GbE ports that to use for VLTi on Switch1.

   interface range ethernet 1/1/25-1/1/26
   description VLTi
   no switchport
   mtu 9216
   exit
   

4. Create a VLTi domain and select 100 GbE ports as discovery interfaces.

   vlt-domain 1
   discovery-interface ethernet 1/1/25-1/1/26
   

   • vlt-domain, and port numbers should be the same on both switches.
   • Ports 25 and 26 are both 100 GbE ports on the Dell S4148-ON PowerSwitch Series. Other switches may have different port numbers that are assigned to the 100 GbE ports.
5. Specify the management IP of the other ToR switch as VLT backup (required for heartbeat).
   • For Switch1, use the Switch2 IP address for the backup destination.
   • For Switch2, use the Switch1 IP address for the backup destination.

   backup destination 100.0.100.11
   

6. Enable peer-routing to prepare to configure your uplinks. Peer routing enables or disables L3 routing to peers.
   NOTE:Steps to configure uplinks to the customer networks are not described in this guide.

   peer-routing

7. Set the priority of the switch.

   primary-priority 1

   Valid priority values range from 1 to 65535. The switch with the lower priority setting takes precedence of the switch with the higher priority value. Do not set the same priority value to the two ToR switches.
8. Enter a VLT MAC address to avoid conflicts on the network.
   NOTE:You cannot use all zeros (00:00:00:00:00) for the VLT MAC address.

   vlt-mac 00:00:00:00:00:01

   Use the same VLT MAC address when configuring switch 2.
9. Repeat the above steps for the second switch.
   While doing so, reverse the switch IP address in step 5 as demonstrated in the code sample below.

   Table 1. Code sample of VLTi configuration stepsCode sample of VLTi configuration steps

   Switch 1	Switch 2
   configure terminal interface range ethernet 1/1/25-1/1/26 description vlti no switchport mtu 9216 exit vlt-domain 1 discovery-interface ethernet 1/1/25-1/1/26 backup destination 100.0.100.11 peer-routing primary-priority 1 vlt-mac 00:00:00:00:00:01	configure terminal interface range ethernet 1/1/25-1/1/26 description vlti no switchport mtu 9216 exit vlt-domain 1 discovery-interface ethernet 1/1/25-1/1/26 backup destination 100.0.100.10 peer-routing primary-priority 8192 vlt-mac 00:00:00:00:00:01