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DELL S50V User Manual

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Boot the chassis with dual RPMs
When you boot the system with two RPMs installed, the RPM in slot R0 is the primary RPM by default. 
Both RPMs should be running the same version of FTOS. You can configure either RPM to be the primary 
upon the next chassis reboot using the command 
redundancy primary
 from CONFIGURATION mode.
Version compatibility between RPMs
In general, the two RPMs should have the same FTOS version. However, FTOS tolerates some degree of 
difference between the two versions, as described in 
. View the configuration loaded on each 
RPM using the 
show redundancy 
command as shown in 
.
Table 18-1.  System Behavior with RPMs with Mismatched FTOS Versions
Mismatch Condition
Example
Behavior
different FTOS versions with 
only first two digits matching
Primary: 7.4.2.0
Standby: 7.4.1.0
The link to the standby RPM is up, and FTOS block syncs only the 
startup-config. The failover type is warm upgrade. FTOS displays 
different FTOS versions with 
first two digits not matching
Primary: 7.6.1.0
Standby: 7.5.1.0
The link to the standby RPM is down, and the standby RPM is in a boot 
loop. FTOS displays 
different FTOS versions with 
only first three digits matching
Primary: 7.4.2.0
Standby: 7.4.2.1
The link to the peer RPM is up, and FTOS performs a complete block 
sync. The failover type is hot failover. FTOS displays 
Message 2  FTOS Version Incompatibility Error
************************************************
 *
 *     Warning !!!  Warning !!!  Warning !!!
 *
 * ----------------------------------------------
 *
 *       Incompatible SW Version detected !!
 *
 *       This RPM -> 7.4.2.0
 *       Peer RPM -> 7.4.1.0
 *
 ************************************************
00:00:12: %RPM0-U:CP %IRC-4-IRC_VERSION: Current RPM 7.4.2.0 Peer RPM 7.4.1.0 - Different 
software version detected
00:00:12: %RPM0-U:CP %IRC-6-IRC_COMMUP: Link to peer RPM is up
00:00:14: %RPM0-U:CP %RAM-6-ELECTION_ROLE: RPM0 is transitioning to Primary RPM.
Message 3  Boot Failure on Standby RPM
System failed to boot up. Please reboot the chassis !!!
00:12:46: %RPM1-U:CP %TME-0-RPM BRINGUP FAIL: FTOS failed to bring up the system
    Communication between RPMs is not up, check the software version and reboot chassis.
FTOS(standby)(bootfail)#