This virtual trunking protocol pdf includes a list of references, but its sources remain unclear because it has insufficient inline citations. Please help to improve this article by introducing more precise citations. Virtual Link Trunking or VLT is a proprietary aggregation protocol developed by Force10 and available in their datacenter-class or enterprise-class network switches. Beside increasing bandwidth another reason for link aggregation is redundancy.
The switches running in a stacked configuration always have to run the same firmware, which means that in case of a firmware upgrade the network manager has to implement the new firmware on all stack-members at the same time, resulting in an outage of the entire stack. Multiple Spanning Tree or Cisco’s proprietary per VLAN spanning tree. Spanning Tree Protocol is relatively slow in convergence, which can result in periods that traffic can’t be forwarded over the network – and thus leads to outages of the applications. VLT should address all these issues, making it possible to create a loop free redundant network topology without using the Spanning Tree Protocol.
Prior to supporting standardized IEEE 802. 16 reserved for Spanning Tree Protocol. F10’s open-cloud networking, 27 April 2011.