Change the cluster lead to the secondary fabric interconnect. Upgrade the secondary fabric interconnect. For vNICs configured with failover, verify that the traffic has failed over by using Cisco UCS Manager, or tools such as vCenter. Stop all the traffic that is active through a fabric interconnect. You can use fabric evacuation during the upgrade process as follows: 1. This traffic fails over to the primary fabric interconnect. Upgrading the secondary fabric interconnect in a system disrupts active traffic on the fabric interconnect. Fabric evacuation is not supported on direct-attached rack servers. Note For UCS 2200 I/O modules, you can also select the Port Channel option and all I/O module-connected server ports will be automatically added to a port channel.Ĭisco UCS Manager introduces fabric evacuation, which is the ability to evacuate all traffic that flows through a fabric interconnect from all servers attached to it through an IOM or FEX while upgrading a system. You must also configure the IOM ports and the global chassis discovery policy. Make sure there is physical connectivity between the fabric interconnect and IOMs. Configure Fabric interconnect ports that should be connected to downlink IOM cards as server ports. The primary functions of this module are to facilitate blade server I/O connectivity (internal and external), multiplex all I/O traffic up to the fabric interconnects, and help monitor and manage the Cisco UCS infrastructure. IOM settings are pushed via Cisco UCS Manager and are not managed directly. The best analogy is to think of it as a remote line card that's embedded in the blade server chassis, allowing connectivity to the external world. The Fabric Extender (also referred to as the IOM, or FEX) logically extends the fabric interconnects to the blade server. Each IOM is connected directly to a single fabric interconnect. Each IOM, when connected with the fabric interconnect server port, behaves as a line card to fabric interconnect, hence IOMs should never be cross-connected to the fabric interconnect. You must configure the connectivity between the fabric interconnect server ports and IOMs. Internal connectivity from blade servers to IOMs is transparently provided by Cisco UCS Manager using 10BASE-KR Ethernet standard for backplane implementations, and no additional configuration is required. Each fabric interconnect is connected to IOMs in the UCS chassis, which provides connectivity to each blade server.
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