MVRP considerations and limitations

• You can enable MVRP only on interfaces configured as switchport in both trunk and access modes.
• The interface must be configured in 'switchport access mode' only on the edge ports of the SLX-OS device where MVRP selects statically configured VLANs for propagation. The interfaces connecting the devices on the SLX devices should be only configured in 'switchport trunk mode' where MVRP dynamincally configures the VLANs. MVRPDUs received on ports configured in access mode are dropped; VLANs are neither learned nor propagated.
• MVRP can be learned for all allowed configurable VLANs, up to 4090 VLANs in number.
• MVRP can be enabled on all physical and PO interfaces without any CLI restrictions.
• A maximum of 2k dynamic VLANs are supported on each MVRP-enabled interface. However, the MVRP timer values require adjustment to less aggressive values based on the number of MVRP-enabled interfaces, VLANs to be learned dynamically on each associated interface, load on the system, and the topology.

  If MVRP is scaled to an extent with the default timer settings that are too aggressive, the device may become unresponsive and severe performance impact could occur. Extreme recommends that you increase the MVRP timer values to values that are less aggressive for effective MVRP operation.

• If you manually configure a VLAN that is currently a dynamically-learned VLAN, the VLAN is converted to the Static type and the device initiates an appropriate Syslog message. Though the VLAN is Static in type, its member switch ports are of the Dynamic type (dynamically learned).

  If you configure a Static VLAN on a MVRP-enabled dynamically-learned switch port, the ports are configured to the Static type and the device initiates an appropriate Syslog message.

  You cannot delete a Static VLAN with Dynamic ports through the CLI until all Dynamic ports are converted to Static.

• The device also supports the following Layer 2 features with MVRP:
  • Spanning Tree Protocol (STP)
  • Rapid Spanning Tree Protocol (RSTP)
  • Common Internal Spanning Tree (CIST)
• The following features are not supported with MVRP:
  • PVST and PVST+
  • RPVST and RPVST+
  • MSTIs for MSTP
  • MVRP over any ring protocols
  • MVRP with topology groups