Administrator Guide

Congure RSTP on VLT Peers to Prevent Forwarding Loops (VLT Peer 1)
Dell_VLTpeer1(conf)#protocol spanning-tree rstp
Dell_VLTpeer1(conf-rstp)#no disable
Dell_VLTpeer1(conf-rstp)#bridge-priority 4096
Congure RSTP on VLT Peers to Prevent Forwarding Loops (VLT Peer 2)
Dell_VLTpeer2(conf)#protocol spanning-tree rstp
Dell_VLTpeer2(conf-rstp)#no disable
Dell_VLTpeer2(conf-rstp)#bridge-priority 0
Conguring VLT
To congure VLT, use the following procedure.
Prerequisites: Before you begin, make sure that both VLT peer switches are running the same Dell Networking OS version and are
congured for RSTP as described in RSTP Conguration. For VRRP operation, ensure that you congure VRRP groups and L3 routing on
each VLT peer as described in VLT and VRRP interoperability in the Conguration Notes section.
To congure virtual link trunking and create a VLT domain in which two S5000 switches are physically connected and treated as a single
port channel by access devices, congure the following settings on each VLT peer device.
1 Congure the VLT interconnect for the VLT domain. The primary and secondary switch roles in the VLT domain are automatically
assigned after you congure both sides of the VLTi.
NOTE
: If you use a third-party ToR unit, Dell Networking recommends using static LAGs on the VLTi between VLT
peers to avoid potential problems if you reboot the VLT peers.
2 Enable VLT and create a VLT domain ID. VLT automatically selects a system MAC address.
3 Congure a backup link for the VLT domain.
4 (Optional) Manually recongure the default VLT settings, such as the MAC address and VLT primary/secondary roles.
5 Connect the peer switches in a VLT domain to an attached access device (switch or server).
Conguring a VLT Interconnect
To congure a VLT interconnect, follow these steps.
1 Congure the port channel for the VLT interconnect on a VLT switch and enter Interface Conguration mode.
CONFIGURATION mode
interface port-channel id-number
Enter the same port-channel number congured with the peer-link port-channel command as described in Enabling VLT and
Creating a VLT Domain.
NOTE
: To be included in the VLTi, the port channel must be in Default mode (no switchport or VLAN assigned).
2 Remove an IP address from the interface.
INTERFACE PORT-CHANNEL mode
no ip address
3 Add one or more port interfaces to the port channel.
INTERFACE PORT-CHANNEL mode
Virtual Link Trunking (VLT)
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