Cluster I/O Protocols (CIP) Configuration and Management Manual (H06.16+, J06.05+)

to the others. The number of bonded interfaces and the number of slaves in each is limited only
by the number of data LAN interfaces on the CLIM. Typically, the bonded interface takes up the
MAC address of its first slave.
A bonded interface can be configured to use one of several policies for fault tolerance and
bandwidth aggregation. CIP supports all current policy modes as long as their prerequisites are
met. See “climconfig.bondmode Description” (page 306) for descriptions of the bonding modes.
Interface resources are configured and created for the bonded interface, not the individual slave
interfaces. CLIM-to-CLIM failover can switch a bonded interface to a configured failover interface
by command or if the bonded interface indicates a failure. This occurs only if all its slaves have
failed.
As of J06.10 and H06.21, the DL380 G6 CLIM is available, which has 2 embedded NICs, one
for eth0 and eth1 and the other for eth2 and eth3. It also has one external PCI NIC for eth4 and
eth5. This allows you to create 2 bonded interfaces that are spread across two NICs, for example
eth1 and eth4 as bond0, and eth2 and eth5 as bond 1. In this configuration losing one NIC will
not result in losing an entire bond.
CLIM-to-CLIM Failover
CIP supports failover of individual interfaces from one CLIM to interfaces on other CLIMs under the
same Provider. Failover of an entire CLIM is treated as failover of all its interfaces. Table 3:
CLIM-to-CLIM Failover describes the various scenarios of failure and resulting failover action:
Table 3 CLIM-to-CLIM Failover
Resulting Failover ActionProbable CausesFailure Definition
Initiate failover of all interfaces on the
CLIM
Failure in all processors to receive
heartbeat from CLIM for more than a
heartbeat time
• ServerNet path failure between all
processors and the CLIM
• CLIM panic halt or hang
• CLIM reboot
• CLIM CLIMCMD clim stop
command
• CLIM software problem
Initiate interface failover.
• NIC hardware failure
Failure indication on data LAN
interface or on all interfaces in a
bonded interface
No failover actionLoss of link pulse on data LAN
interface or on all interfaces in a
• Transient condition
• Recoverable failure in bonded
interface
bonded interface for less than link
pulse time
• Cable briefly disconnected
• Cable permanently disconnected
• Switch or network down
Initiate interface failoverLoss of link pulse on data LAN
interface or on all interfaces in a
• Cable permanently disconnected
• Switch or network down
The CIP Subsystem for Internet Protocols (IP CIP) 43