Stacking | 569
Master Switch Recovers from Failure
Problem: The master switch recovers from a failure after a reboot and rejoins the stack:
• As a member unit if there is already a standby
• As a standby if there is no standby in the stack
Protocol and control plane recovery requires time before the switch is fully online.
Resolution: When the entire stack is reloaded, the recovered master switch becomes the master unit of the
stack.
Stack Unit in Card-Problem State Due to Incorrect FTOS Version
Problem: A stack unit enters a Card-Problem state because the switch has a different FTOS version than
the master unit (Figure 31-19). The switch does not come online as a stack unit.
Resolution: To restore a stack unit with an incorrect FTOS version as a member unit, disconnect the
stacking cables on the switch and install the correct FTOS version. Then add the switch to the stack as
described in Adding a Stack Unit. To verify that the problem has been resolved and the stacked switch is
back online, use the
show system brief command (Figure 31-20).
Figure 31-19. Card Problem Error - Different FTOS Versions
FTOS#show system brief
Stack MAC : 00:1e:c9:f1:01:57
Reload Type : normal-reload [Next boot : normal-reload]
-- Stack Info --
Unit UnitType Status ReqTyp CurTyp Version Ports
----------------------------------------------------------------------------------------------
---------------------------
0 Management online MXL-10/40GbE MXL-10/40GbE 8-3-16-79 56
1 Member card problem MXL-10/40GbE unknown 56
2 Standby online MXL-10/40GbE MXL-10/40GbE 8-3-16-79 56
3 Member not present
4 Member not present
5 Member not present
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