White Papers

Stacking and VLT
Dell EMC Technical White Paper
Table of contents
Revisions............................................................................................................................................................................. 2
Acknowledgements ............................................................................................................................................................. 2
1 Introduction ................................................................................................................................................................... 4
2 Overview of stacking .................................................................................................................................................... 5
2.1 Stacking architecture .......................................................................................................................................... 5
2.2 Features of stacking ........................................................................................................................................... 5
2.3 Election of stack master ..................................................................................................................................... 6
2.4 Addition of a switch to the stack ......................................................................................................................... 6
2.5 Removal of the switch from the stack ................................................................................................................. 7
2.6 Stacking standby ................................................................................................................................................ 7
2.7 Failover roles ...................................................................................................................................................... 7
2.8 Creating a stack .................................................................................................................................................. 7
3 Overview of Virtual Link Trunking (VLT) .................................................................................................................... 11
3.1 VLT architecture ............................................................................................................................................... 11
3.2 VLT operation ................................................................................................................................................... 12
3.3 VLT functionality ............................................................................................................................................... 12
3.4 VLT backup ....................................................................................................................................................... 12
3.5 Link failover scenarios in VLT ........................................................................................................................... 13
3.6 VLT configuration.............................................................................................................................................. 14
4 Conclusion .................................................................................................................................................................. 16
5 Appendix ..................................................................................................................................................................... 17