Руководство По Проектированию для Cisco Cisco Nexus 5010 Switch
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Figure 18 illustrates the consequences of a peer link failure in a double-sided vPC topology for single-attached
hosts. As previously described, single-attached hosts or hosts attached with active-standby network interface card
(NIC) teaming connect to orphaned ports. When the peer link fails as shown in Figure 18, all vPC ports on the
secondary vPC device are shut down, including the uplink to the Cisco Nexus 7000 Series Switch. As a result,
some hosts, such as Host 3 and Host 4, may become isolated. Host 3 becomes isolated because it is single-
attached to the secondary vPC device. Host 4 becomes isolated because its NIC teaming configuration is such that
the active NIC is connected to the secondary vPC device.
Thus, you should make sure that servers are dual-connected and that teaming is properly configured. If a choice
needs to be made for single-connected servers, they should connect to the operational primary device.
Figure 18. Peer Link Failures Do Not Cause Split Subnets Scenarios but May Isolate Active-Standby Connected Hosts - A
Problem Now Solved with vpc orphan ports suspend
Enter the following command to see any orphan ports:
Nexus5000#show vpc orphan-ports
The vpc orphan ports suspend Command
Apply the command vpc orphan-ports suspend to all interfaces that are not part of a vPC so that these interfaces
are shut down on the vPC secondary device when the peer link goes down.
As Figure 19 illustrates, if the peer link goes down, the vPC shuts down the orphan ports that are configured with
vpc orphan-ports suspend, which forces teaming to take the path through the vPC primary switch.