Users Guide

• Boot the Chassis with a Single RPM
• Boot the Chassis with Dual RPMs
• Automatic and Manual RPM Failover
• Support for RPM Redundancy by Dell Networking OS Version
• RPM Synchronization
Boot the Chassis with a Single RPM
You can boot the chassis with one RPM and later add a second RPM, which automatically becomes the standby RPM.
Dell Networking OS displays the following message when the standby RPM is online.
%RPM-2-MSG:CP0 %POLLMGR-2-ALT_RPM_STATE: Alternate RPM is present
%IRC-6-IRC_COMMUP: Link to peer RPM is up
%RAM-6-RAM_TASK: RPM1 is in Standby State.
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 must be
running the same version of Dell Networking OS.
To configure either RPM to be the primary after the next chassis reboot, use the redundancy primary command from
CONFIGURATION mode.
Version Compatibility Between RPMs
In general, the two RPMs should have the same Dell Networking OS version. However, Dell Networking OS tolerates some
degree of difference between the two versions, as described in the following table. To view the configuration loaded on each
RPM, use the show redundancy command, as shown in the example in Automatic and Manual RPM Failover.
Table 32. Mismatch Condition Behaviors
Mismatch Condition Example Behavior
Different Dell Networking OS versions
with only the first two digits matching.
Primary: 7.4.2.0
Standby: 7.4.1.0
The link to the standby RPM is up and
Dell Networking OS block syncs only the
startup-config. The failover type is warm
upgrade. Dell Networking OS displays
the following message.
Different Dell Networking OS versions
with the 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. Dell
Networking OS displays the second
message and a boot fail prompt.
Different Dell Networking OS versions
with only the first three digits matching.
Primary: 7.4.2.0
Standby: 7.4.2.1
The link to the peer RPM is up and Dell
Networking OS performs a complete
block sync. The failover type is hot
failover. Dell Networking OS displays the
following message.
Example of Dell Networking OS Version Incompatibility Error
************************************************
*
* Warning !!! Warning !!! Warning !!!
*
* ----------------------------------------------
*
* Incompatible SW Version detected !!
*
* This RPM -> 7.4.2.0
High Availability (HA) 337