Ones Stop Systems
EB7-X8G2-RAS | 9
APPENDIX B I/O Switching Via SNMP
68
9
APPENDIX B I/O Switching Via SNMP
The following instructions involve configuring 2 servers that are exactly identical to be able to switch I/Os at any given time. The switch I/O
feature can be used as a failover mechanism if one server went down or if the I/Os need to be designated to Server 2 for any reason. It should
be noted that this feature is not yet applicable to cases where the two host machines are not identical (i.e. taking the I/Os of a serial card away
from and IBM server and re-designating them to a Dell server).
Further, Server 1 and Server 2 must share the same processors, chipsets and overall architecture, for example, two IBM Blade servers.
In the next example we will use the EB7-x8G2RAS chassis with OSS’s fiber EIF card, 01-04978-05, connected to two IBM servers. Similarly, the
EB7-x8G2RAS chassis can accommodate two regular EIF cards in slots 0 and 1, each connected via an iPass cable to the two servers. Finally, this
test was performed under VMware ESX4.1.
Step 1: Make sure all systems are off – after doing so, connect both servers to the uplink EIF card in the OSS chassis. Do not turn the servers on
just yet. The dual uplink is labeled Server 1 and Server 2, which correspond to the specified fiber ports, as shown below.
Make sure the chassis is off
Insert and secure the I/O cards in slots 1 through 7 of the chassis
Step 2: Power on the OSS chassis.
BY DEFAULT, ALL I/O ARE ASSIGNED TO SERVER 1
In this example, we will refer to server 2 as the backup server, and server 1 as the main (primary) server.
Step 3: Hook the chassis up to some type of NAT with an addressing scheme of 192.168.X.X so you can access and or change the networking
properties
Step 4: Power on server 1 and boot it into the WMware ESX4.1 shell.
Once WMware ESX 4.1 is booted, connect to Server 1 via VSphere and mark our target PCIe device for pass-through as 08:00.0 and 08.00.1. This
device is a PCIe card plugged into the OSS chassis, whose I/Os we wish to re-direct, in this case an Oxford Semiconductor serial card.