Dell PowerConnect 7048P User Manual - Page 138
Adding a Switch to the Stack, unassigned
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• If the Management Unit function is disabled, the unit remains a nonManagement Unit. If the entire stack is powered OFF and ON again, the unit that was the Management Unit before the reboot will remain the Management Unit after the stack resumes operation. You can manually set the unit number for the switch. To avoid unit-number conflicts, one of the following scenarios takes place when you add a new member to the stack: • If the switch has a unit number that is already in use, then the unit that you add to the stack changes its configured unit number to the lowest unassigned unit number. • If the switch you add does not have an assigned unit number, then the switch sets its configured unit number to the lowest unassigned unit number. • If the unit number is configured and there are no other devices using the unit number, then the switch starts using the configured unit number. • If the switch detects that the maximum number of units already exist in the stack making it unable to assign a unit number, then the switch sets its unit number to unassigned and does not participate in the stack. Adding a Switch to the Stack When adding a new member to a stack, make sure that only the stack cables, and no network cables, are connected before powering up the new unit. Make sure the links are not already connected to any ports of that unit. This is important because if STP is enabled and any links are UP, the STP reconvergence will take place as soon as the link is detected. After the stack cables on the new member are connected to the stack, you can connect the power. Do not connect a new member to the stack after it is powered up. Also, do not connect two functional, powered-up stacks together. Hot insertion of units into the stack is not supported. If there are any unassigned units already configured on the stack, remove them prior to adding a new unit to stack. This is important because when there is any preconfigured unit and the Master holds some configuration of that unit, as soon as the unit is detected, the configuration is applied, which 138 Managing a Switch Stack
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1,195
-
1,196
-
1,197
-
1,198
-
1,199
-
1,200
-
1,201
-
1,202
-
1,203
-
1,204
-
1,205
-
1,206
-
1,207
-
1,208
-
1,209
-
1,210
-
1,211
-
1,212
-
1,213
-
1,214
-
1,215
-
1,216
-
1,217
-
1,218
-
1,219
-
1,220
-
1,221
-
1,222
-
1,223
-
1,224
-
1,225
-
1,226
-
1,227
-
1,228
-
1,229
-
1,230
-
1,231
-
1,232
-
1,233
-
1,234