Stacking Dell PowerConnect 7000 Series Switches |
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console#show switch |
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Switch | Management | Standby | Preconfig | Switch | Code | |
Status | Status | Model ID | Model ID | Status | Version | |
1 | Stack Mbr | Standby | PCT7048 | PCT7048 | OK | 4.0.0.6 |
2 | Unassigned |
| PCT7048 | PCT7048 | Not Present | 0.0.0.0 |
3 | Mgmt Switch |
| PCT7048 | OK | 4.0.0.6 | |
4 | Stack Mbr |
| PCT7048 | PCT7048 | OK | 4.0.0.6 |
When the failed unit resumes normal operation, the previous configuration that exists for that unit is reapplied by the master unit.
Scenario 2
Consider the same example with a
Figure 4. Stack Split
Switch 1
Switch 2 Standby
Switch 3
Switch 4
Stack 1
Switch 1
Switch 2 Master
Switch 3
Switch 4
Stack 2
If the link between Switch 2 and Switch 3 is removed, the stack is split into two different stacks with Switches 1 and 2 in one stack and Switches 3 and 4 in another.
The master unit for each stack is determined by the following criteria:
•Switch 3 was configured as master prior to the split, so it will continue to be the master unit for Stack 2 (units 3 and 4).
•If Switch 2 is configured as the standby, it becomes the master for Stack 1 (units 1 and 2).
•If none of the units in Stack 1 are configured as master or standby, then Stack 1 will have no master after the split. The election process will start on these two units, and either Switch 1 or Switch 2 will come up as a master based on which switch has the highest base MAC address.
In this specific example, there will not be any change in the configuration in Stack 2. Stack 1 will come up with the previously saved configuration on the new master elected.
Note that stack splits are less likely when the switches are cabled in a ring. For example, if Switch 4 was connected to Switch 1 and the link between Switch 2 and Switch 3 was removed, all switches would remain members of the single stack with Switch 3 continuing as the master.
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