Cisco Nexus 5000 Series Switch Fabric Manager Software Configuration Guide, NX-OS 4.0 (OL-16598-01, June 2008)

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7-3
Nexus 5000 Series Switch Fabric Manager Software Configuration Guide
OL-16598-01
Chapter 7 Using Cisco Fabric Services
CFS Distribution
Uncoordinated Distribution
Uncoordinated distributions are used to distribute information that is not expected to conflict with that
from a peer. Parallel uncoordinated distributions are allowed for a feature.
Coordinated Distribution
Coordinated distributions allow only one feature distribution at a given time. CFS uses locks to enforce
this. A coordinated distribution is not allowed to start if locks are taken for the feature anywhere in the
network. A coordinated distribution consists of three stages:
1. A network lock is acquired.
2. The configuration is distributed and committed.
3. The network lock is released.
Coordinated distribution has two variants:
• CFS driven —The stages are executed by CFS in response to an feature request without intervention
from the feature.
• Feature driven—The stages are under the complete control of the feature.
Coordinated distributions are used to distribute information that can be manipulated and distributed
from multiple switches, for example, the port security configuration.
Unrestricted Uncoordinated Distributions
Unrestricted uncoordinated distributions allow multiple parallel distributions in the network in the
presence of an existing coordinated distribution. Unrestricted uncoordinated distributions are allowed to
run in parallel with all other types of distributions.
Enabling/Disabling CFS Distribution on a Switch
If the switch is provisioned with Fibre Channel ports, CFS over Fibre Channel is enabled by default. CFS
over IP must be explicitly enabled.
You can globally disable CFS on a switch to isolate the features using CFS from network-wide
distributions while maintaining physical connectivity. When CFS is globally disabled on a switch, CFS
operations are restricted to the switch.
To globally disable or enable CFS distribution on a switch using Fabric Manager, perform this task:
Step 1 Choose any CFS feature. For example, expand Switches > Events and then choose CallHome in the
Physical Attributes pane.
The Information pane shows that feature, with a CFS tab.
Step 2 Click the CFS tab to display the CFS state for each switch in the network for that feature.
Step 3 Click a value in the Global State column. The value changes to a drop-down menu.
Step 4 From the drop-down menu, choose disable or enable.
Step 5 Repeat steps 3 and 4 for all switches that you want to disable or enable CFS.
Step 6 Set the Config Action column to commit.