Cisco Nexus 5500 Series NX-OS Software Upgrade and Downgrade Guide, Release 7.3(1)N1(1)
This command also displays if the upgrade is disruptive or the reason why the upgrade is disruptive, if the Cisco Nexus Fabric Extender needs to be rebooted, and the reason why it needs to be rebooted.
Note We recommend that you log in to the console port to begin the upgrade process. In virtual port channel vPC topologies, you should start with the device that is the primary device.
Table 1 summarizes the terms used in the install all command output to verify module and software image compatibility. Table 1 show install all impact Command and Output Terminology. Ability of the module to boot or not boot based on image compatibility.
Type of software upgrade mechanism—disruptive or nondisruptive. The following images are upgraded during the installation:. The install-all command provides the following benefits:. Note After a successful power sequence upgrade, you must switch off the power to the system and then power it up. The summary displayed by the installer during the installation process indicates the current version of the BIOS and power sequencer and the target version. A few conditions have to be met for the system to be upgraded through 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 an ISSU are not met or if you intend to downgrade the software version, the installation process is disruptive. 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.Cisco v irtual P ort C hannel vPC is a virtualization technology, launched inwhich allows links that are physically connected to two different Cisco Nexus Series devices to appear as a single port channel to a third endpoint.
The endpoint can be a switchserverrouter or any other device such as Firewall or Load Balancers that support the link aggregation technology EtherChannel. The diagram below clearly illustrates the differences in both logical and physical topology between a non-vPC deployment and a vPC deployment :. Finally, a Quiz is included at the last section and we are waiting for your comments and answers! The Nexus, and series switches take port-channel functionality to the next level by enabling links connected to different devices to aggregate into a singlelogical link.
The peer switches run a control protocol that synchronizes the state of the port channel and maintains it. The following general guidelines and recommendations should be taken into account when deploying vPC technology at a Cisco Nexus Data Center :. This is the adjacent device, which is connected via the vPC Peer-link. A vPC setup consists of two Nexus devices in a pair.
The vPC peer-link is the most important connectivity element in the vPC setup. This link is used to synchronize the state between vPC peer devices via vPC control packets which creates the illusion of a single control plane. In addition the vPC peer-link provides the necessary transport for multicastbroadcastunknown unicast traffic and for the traffic of orphaned ports.
The Peer Keepalive Link provides a Layer 3 communications path that is used as a secondary test in order to determine whether the remote peer is operating properly. In particular, it helps the vPC switch to determine whether the peer link itself has failed or whether the vPC peer is down.
The default timers are an interval of 1 second with a timeout of 5 seconds. This is the common domain configured across two vPC peer devices and this value identifies the vPC. A vPC domain id per device is permitted. This is the interface that is a member of one of the vPCs configured on the vPC peers.
This protocol is used for stateful synchronization and configuration. It utilizes the peer link and does not require any configuration by the administrators. The Cisco Fabric Services over Ethernet protocol is used to perform compatibility checks in order to validate the compatibility of vPC member ports to form the channel, to synchronize the IGMP snooping status, to monitor the status of the vPC member ports, and to synchronize the Address Resolution Protocol ARP table.
V irtual S witching S ystem VSS is a virtualization technology that pools multiple Cisco Catalyst Switches into one virtual switchincreasing operational efficiency, boosting nonstop communications, and scaling system bandwidth capacity.
Both technologies are similar from the perspective of the downstream switch but there are differences, mainly in that the control plane works on the upstream devices. Multi-Chassis Port Channel. Loop Free Topology. Spanning Tree as failsafe protocol. Maximum physical Nodes.