The following additional restrictions and guidelines are in place when operating in SmartFabric mode:
- Interconnecting switches in Slots A1/A2 with switches in Slots B1/B2, regardless of chassis, is not supported.
- When operating with multiple chassis, switches in Slots A1/A2 or Slots B1/B2 in one chassis must be interconnected only with other Slots A1/A2 or Slots B1/B2 switches respectively. Connecting switches that reside in Slots A1/A2 in one chassis with switches in Slots B1/B2 in another is not supported.
- Physical uplinks must be symmetrical. If one switch in a SmartFabric has two uplinks, the other switch must have two uplinks of the same speed. Single-armed uplinks are not currently supported.
- You cannot have a pair of switches in SmartFabric mode uplink to another pair of switches in SmartFabric mode. A SmartFabric can uplink to a pair of switches in Full Switch mode.
- VLANs 4004 and 4020 are reserved for internal switch communication and must not be assigned to an interface.
- In SmartFabric mode, although you can use the CLI to create any non-restricted VLANs, but you cannot assign interfaces to them. For this reason, do not use the CLI to create VLANs in SmartFabric mode.
- VLAN 1 is automatically created as the Default/Native VLAN, but it is not required to be used. See Define VLANs for more information.
- Do not create a VLAN or subnet on the Fabric that is in use for the management network on the MX Chassis or MX IOMs.