Best Practices for HP BladeSystem Deployments using HP Serviceguard Solutions for HP-UX 11i (May 2010)

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Figure 10: Onboard Administrator Window showing Device Bay 7 Port Mapping
From the Port Mapping view, the embedded network ports, FC HBA ports from Mezzanine Slot 1 and
Ethernet ports from Mezzanine Slot 2 are shown mapped to their respective interconnect bay ports.
Note in this example configuration, ports 3 and 4 of the Quad-Port Mezzanine HBA are not mapped
because there are no interconnect modules in enclosure interconnect bays 7 and 8. Although these
ports are unavailable, the LOM ports on the blade server provide network redundancy, while at least
two ports of the Quad-Port Mezzanine card can provide additional network connectivity.
To utilize the redundant components available for the server blade in this configuration example, a
Virtual Connect server profile has been created as shown in figure 11. The server profile has been
configured to use LOM port 1 for the primary site LAN and LOM port 4 for the private Serviceguard
heartbeat LAN, with are assigned to interconnect bays 1 and 2, respectively. Note that LOM ports 2
and 3 were not used in this case because the standby site and secondary heartbeat LAN connections
have been configured to use the Ethernet ports on the Mezzanine Card Slot 2, which are assigned to
interconnect bays 5 and 6. If no additional Ethernet Mezzanine cards were available, all 4 internal
ports could have been used to achieve a redundant network configuration by using ports 1 and 4 as
the primary/standby pair for the site network and ports 2 and 3 as primary/standby pair for the
Serviceguard heartbeat network. This configuration now provides Ethernet hardware redundancy for
both the site and Serviceguard heartbeat LANs. In the event of either a LOM, Ethernet Mezzanine
card, or interconnect module failure, Serviceguard can recover from the failure by performing a local
LAN failover.
Since this configuration only has one 2-port Fiber Channel Mezzanine HBA installed in Mezzanine
Slot 1, it is only possible to configure the server profile to use each port assigned to interconnect bays
3 and 4. Although a 2
nd
Fiber Channel Mezzanine card is not available, the ports of the one Fiber
Channel Mezzanine card are using separate interconnect modules, thus eliminating the interconnect
modules as a potential SPOF. However; for the highest level of availability, it is a recommended best
practice to use two Fiber Channel Mezzanine cards for compete redundancy.