3Com SuperStack 4 Configuration Manual page 224

236 C 9: XRN F
HAPTER ABRIC
[SW5500}set unit 1 name unit3
[SW5500]sysname hello
Configure Switch D:
[SW5500]change unit-id 1 to auto-numbering
[SW5500}set unit 1 name unit
[[SW5500]sysname hello
In the example, it is assumed that the system will automatically change the unit IDs
of Switch B, Switch C and Switch D to 2, 3 and 4 after you choose
auto-numbering for unit-id.