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Dell SmartFabric OS10 User Guide Release 10.5.3

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VLT interconnect

A VLT interconnect (VLTi) synchronizes states between VLT peers. OS10 automatically adds VLTi ports to VLANs spanned across VLT peers, but does not add VLTi ports to VLANs configured on only one peer.

  • VLAN ID 4094 is reserved as an internal control VLAN for the VLT domain, and it is not user configurable.
  • Port-channel 1000 is reserved for the VLTi link and is not user configurable.
  • The VLTi synchronizes L2 and L3 control-plane information across the two nodes. The VLTi is used for data traffic only when there is a link failure that requires VLTi to reach the final destination.
  • Traffic with an unknown destination MAC address, multicast, or broadcast traffic can cause flooding across the VLTi.
  • MAC, ARP, IPv6 neighbors that are learnt over VLANs on VLT peer nodes synchronize using the VLTi.
  • LLDP, flow control, port monitoring, and jumbo frame features are supported on a VLTi. By default, VLTi ports are set to the maximum supported MTU value.

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