Dell Force10 S4810P Configuration Manual page 442

Automatic and manual RPM failover
RPM failover is the process of the standby RPM becoming the primary RPM. FTOS fails over to the
standby RPM when:
1. Communication is lost between the standby and primary RPMs
2. You request a failover via the CLI
3. You remove the primary RPM
Use the command
FTOS#show redundancy
-- RPM Status
------------------------------------------------
RPM Slot ID:
RPM Redundancy Role:
RPM State:
RPM SW Version:
Link to Peer:
-- PEER RPM Status
------------------------------------------------
RPM State:
RPM SW Version:
-- RPM Redundancy Configuration
------------------------------------------------
Primary RPM:
Auto Data Sync:
Failover Type:
Auto reboot RPM:
Auto failover limit:
-- RPM Failover Record
------------------------------------------------
Failover Count:
Last failover timestamp:
Last failover Reason:
Last failover type:
-- Last Data Block Sync Record:
------------------------------------------------
Line Card Config:
Start-up Config:
Runtime Event Log:
Running Config:
FTOS#
Communication between RPMs
E-Series RPMs have three CPUs: Control Processor (CP), Routing Processor 1 (RP1), and Routing
Processor 2 (RP2). The CPUs use Fast Ethernet connections to communicate to each other and to the line
card CPUs (LP) using Inter-Processor Communication (IPC). The CP monitors the health status of the
other processors by sending a heartbeat message. If any CPU fails to acknowledge a consecutive number
of heartbeat messages, or the CP itself fails to send heartbeat messages (IPC timeout), the primary RPM
requests a failover to the standby RPM, and FTOS displays a message similar to
442
| High Availability
from EXEC Privilege mode to display the reason for the last failover.
show redundancy
--
0
Primary
Active
7.6.1.0
Up
--
Standby
7.6.1.0
--
rpm0
Full
Hot Failover
Enabled
3 times in 60 minutes
--
0
None
None
None
--
succeeded
succeeded
succeeded
succeeded
May 19 2008 11:34:06
May 19 2008 11:34:06
May 19 2008 11:34:06
May 19 2008 11:34:07
Message 4.