Cisco Cisco Nexus 5010 Switch Guida All'Installazione
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Cisco Nexus 5600 Series NX-OS Software Upgrade and Downgrade Guide, Release 7.1(1)N1(1)
Impact of Upgrades and Downgrades
Note
After a successful power sequence upgrade, you must switch off the power to the system and
then power it up.
then power it up.
Impact of Upgrades and Downgrades
Cisco NX-OS supports in-service software upgrades (ISSUs) that allow a Cisco Nexus device and any
connected FEXs to be upgraded without any traffic disruption (with a brief control plane disruption). A
few conditions have to be met for the system to be upgraded via an ISSU process—the access layer
topology should be ISSU compliant, the current and target versions should be ISSU capable, and the
network should be stable.
connected FEXs to be upgraded without any traffic disruption (with a brief control plane disruption). A
few conditions have to be met for the system to be upgraded via an ISSU process—the access layer
topology should be ISSU compliant, the current and target versions should be ISSU capable, and the
network should be stable.
If the conditions required for ISSU are not met or if you intend to downgrade the software version, the
installation process will be disruptive. For example, rebooting the Cisco Nexus device and any connected
FEX causes a disruption. If Cisco’s virtual port channel (vPC) is configured on Cisco Nexus devices, it
is possible to achieve an upgrade/downgrade with very minimal traffic disruption to servers/hosts.
installation process will be disruptive. For example, rebooting the Cisco Nexus device and any connected
FEX causes a disruption. If Cisco’s virtual port channel (vPC) is configured on Cisco Nexus devices, it
is possible to achieve an upgrade/downgrade with very minimal traffic disruption to servers/hosts.
Note
Doing a disruptive upgrade between incompatible images will result in loss of certain configurations
such as unified ports, breakout, and FEX configurations. See
such as unified ports, breakout, and FEX configurations. See
Note
The Cisco Nexus 5696Q cannot be downgraded from release 7.0(4)N1(1). The Cisco Nexus 56128
cannot be downgraded from release 7.0(2)N1(1). The Cisco Nexus 5672 cannot be downgraded from
release 7.0(1)N1(1a).
cannot be downgraded from release 7.0(2)N1(1). The Cisco Nexus 5672 cannot be downgraded from
release 7.0(1)N1(1a).
In-Service Software Upgrades
With a single supervisor system, such as the Cisco Nexus device, an ISSU on the Cisco Nexus device
causes the supervisor CPU to reset and load the new software version. The control plane is inactive, but
the data plane keeps forwarding packets that lead to an upgrade with no service disruption. After the
CPU loads the updated version of Cisco NX-OS, the system restores the control plane to a previously
known configuration and the runtime state and the data plane are synchronized. Because the data plane
keeps forwarding packets while the control plane is upgraded, any servers connected to the Cisco Nexus
device access layer should see no traffic disruption.
causes the supervisor CPU to reset and load the new software version. The control plane is inactive, but
the data plane keeps forwarding packets that lead to an upgrade with no service disruption. After the
CPU loads the updated version of Cisco NX-OS, the system restores the control plane to a previously
known configuration and the runtime state and the data plane are synchronized. Because the data plane
keeps forwarding packets while the control plane is upgraded, any servers connected to the Cisco Nexus
device access layer should see no traffic disruption.
Table 2
Upgrade/Downgrade Impact
Current Cisco NX-OS Release
Upgrade to NX-OS Release
7.1(1)N1(1)
7.1(1)N1(1)
Downgrade from NX-OS Release
7.1(1)N1(1)
7.1(1)N1(1)
7.0(4)N1(1)—7.0(6)N1(1)
7.1(0)N1(1b)
7.1(0)N1(1a)
7.1(0)N1(1a)
Nondisruptive upgrade
1
2
1.
Disruptive upgrade when operating in 10G fabric mode.
2.
If there are unified ports configured as fiber channel (FC) and a disruptive upgrade is performed, then the FC interfaces must
be reconfigured, and the switch will require a second reload.
be reconfigured, and the switch will require a second reload.
Disruptive downgrade