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Enabling a Standalone Fabric Interconnect for Cluster Configuration
You can add a second fabric interconnect to an existing Cisco UCS domain that uses a single standalone fabric
interconnect. To do this, you must enable the standalone fabric interconnect for cluster operation by configuring
it with the virtual IP address of the cluster, and then add the second fabric interconnect to the cluster.
Procedure
PurposeCommand or Action
Enters local management mode.UCS-A# connect local-mgmt
Step 1
Enables cluster operation on the standalone fabric interconnect
with the specified IP address. When you enter this command,
UCS-A(local-mgmt) # enable
cluster virtual-ip-addr
Step 2
you are prompted to confirm that you want to enable cluster
operation. Type yes to confirm.
The IP address must be the virtual IP address for the cluster
configuration, not the IP address assigned to the fabric
interconnect that you are adding to the cluster.
The following example enables a standalone fabric interconnect with a virtual IP address of 192.168.1.101
for cluster operation:
UCS-A# connect local-mgmt
UCS-A(local-mgmt)# enable cluster 192.168.1.101
This command will enable cluster mode on this setup. You cannot change it
back to stand-alone. Are you sure you want to continue? (yes/no): yes
UCS-A(local-mgmt)#
What to Do Next
Add the second fabric interconnect to the cluster.
Ethernet Switching Mode
The Ethernet switching mode determines how the fabric interconnect behaves as a switching device between
the servers and the network. The fabric interconnect operates in either of the following Ethernet switching
modes:
End-Host Mode
End-host mode allows the fabric interconnect to act as an end host to the network, representing all server
(hosts) connected to it through vNICs. This is achieved by pinning (either dynamically pinned or hard pinned)
vNICs to uplink ports, which provides redundancy toward the network, and makes the uplink ports appear as
server ports to the rest of the fabric. When in end-host mode, the fabric interconnect does not run the Spanning
Tree Protocol (STP) and avoids loops by denying uplink ports from forwarding traffic to each other, and by
Cisco UCS Manager GUI Configuration Guide, Release 2.0
72 OL-25712-04
Enabling a Standalone Fabric Interconnect for Cluster Configuration