Cisco Cisco Nexus 5010 Switch Installationsanleitung
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Cisco Nexus 5500 Series NX-OS Software Upgrade and Downgrade Guide, Release 7.0(8)N1(1)
Minimizing the Impact of a Disruptive Upgrade
Figure 17
vPC Peered Dual-Supervisor Virtual Modular System Dual-Homed FEXs and
Singled-Homed FEXs
Singled-Homed FEXs
Figure 18
Cisco Nexus Devices Connected to Downstream Switches
To upgrade the access layer without a disruption to hosts, follow these tasks:
•
Upgrade the first vPC switch (vPC primary switch). During this upgrade, the switch is reloaded.
When the switch is reloaded, the servers or the downstream switch detects a loss of connectivity to
the first switch and starts forwarding traffic to the second (vPC secondary) switch.
When the switch is reloaded, the servers or the downstream switch detects a loss of connectivity to
the first switch and starts forwarding traffic to the second (vPC secondary) switch.
•
Verify that the upgrade of the switch has completed successfully. At the completion of the upgrade,
the switch restores vPC peering, connected Cisco Nexus Fabric Extenders, and all the links.
the switch restores vPC peering, connected Cisco Nexus Fabric Extenders, and all the links.
•
Upgrade the second switch. Repeating the same process on the second switch causes the second
switch to reload during the upgrade process. During this reload, the first (upgraded) switch forwards
all the traffic to/from servers.
switch to reload during the upgrade process. During this reload, the first (upgraded) switch forwards
all the traffic to/from servers.
•
Verify that the upgrade of the second switch has completed successfully.
Note
Flows that are forwarded to a switch during an upgrade on the switch, fails over to the second switch.
Also, flows are redistributed when vPC peers are active. The traffic disruption is limited to the time
required for the server or host to detect the link-down and link-up events and to redistribute the flows.
Also, flows are redistributed when vPC peers are active. The traffic disruption is limited to the time
required for the server or host to detect the link-down and link-up events and to redistribute the flows.
Nexus 5020
Nexus 5010
Nexus 2000
Nexus 2000
Aggregation
237884
237890
Nexus 5010
Nexus 5020