Dell PowerConnect 7048P User Manual - Page 139

might trigger many other protocols. However, it is possible to intentionally pre-configure a unit. You can view the preconfigured/unassigned units by using the show switch CLI command. If a new switch is added to a stack of switches that are powered and running and already have an elected Management Unit, the newly added switch becomes a stack member rather than the Management Unit. You can preconfigure information about a stack member and its ports before you add it to the stack. The preconfiguration takes place on the Management Unit. If there is saved configuration information on the Management Unit for the newly added unit, the Management Unit applies the configuration to the new unit; otherwise, the Management Unit applies the default configuration to the new unit. Removing a Switch from the Stack The main point to remember when you remove a unit from the stack is to disconnect all the links on the stack member to be removed. Also, be sure to take the following actions: • Remove all the STP participating ports and wait to stabilize the STP. • Remove all the member ports of any Port-Channels (LAGs) so there will not be any control traffic destined to those ports connected to this member. • Statically re-route any traffic going through this unit. When a unit in the stack fails, the Master unit removes the failed unit from the stack. No changes or configuration are applied to the other stack members; however, the dynamic protocols will try to reconverge as the topology could change because of the failed unit. When there are no connected ports on the failed unit, the stack will be intact without any changes. If you remove a unit and plan to renumber the stack, issue a no member unit command in Stack Configuration mode to delete the removed switch from the configured stack member information. Managing a Switch Stack 139