Dell Force10 S55T S55 Configuration Guide FTOS 8.3.5.3 - Page 717

Figure 40-2. Electing the S55 Stack Manager Force10# #show system brief Stack MAC : 00:01:e8:55:00:85 Reload Type : normal-reload -- Stack Info -- Unit UnitType Status ReqTyp CurTyp 0 Member online S55 S55 1 Management online S55 S55 2 Standby online S55 S55 3 Member not present 4 Member not present 5 Member not present 6 Member not present 7 Member not present Force10#show system stack-unit 0 | grep priority Master priority : 0 Force10#show system stack-unit 1 | grep priority Master priority : 0 Force10#show system stack-unit 2 | grep priority Master priority : 0 Force10#show system stack-unit 0| grep "Burned In MAC" Burned In MAC : 00:01:e8:d5:ef:81 Force10#show system stack-unit 0 | grep "Burned In MAC" Burned In MAC : 00:01:e8:d5:ef:81 Force10#show system stack-unit 1 | grep "Burned In MAC" Burned In MAC : 00:01:e8:d5:f9:6f Force10#show system stack-unit 2 | grep "Burned In MAC" Version 8.3.5.1 8.3.5.1 8.3.5.1 Ports 52 52 52 MAC Addressing on S-Series Stacks The S-Series has three MAC addressees: the chassis MAC, interface MAC, and null interface MAC. All interfaces in the stack use the interface MAC address of the management unit (stack manager), and the chassis MAC for the stack is the master's chassis MAC. The stack continues to use the master's chassis MAC address even after a failover. The MAC address is not refreshed until the stack is reloaded and a different unit becomes the stack manager. Note: If the removed management unit is brought up as a standalone unit or as part of a different stack, there is a possibility of MAC address collisions. In Figure 40-3 and Figure 40-4, a standalone is added to a stack. The standalone and the stack master have the same priority, but the standalone has a lower MAC address, so the standalone reboots. In Figure 40-4 and Figure 40-5, a standalone is added to a stack. The standalone has a higher priority than the stack, so the stack (excluding the new unit) reloads. Stacking S-Series Switches | 717