Cisco Cisco Nexus 5010 Switch Guida Alla Risoluzione Dei Problemi
During testing it was also necessary to shutdown the northbound port-channel as it did not pass
the "show spanning-tree issu-impact" non-edge, Criteria 3, check and this would have lead to a
disruptive upgrade. This northbound port-channel was listed not as a vPC Edge in the "show
spanning-tree vlan 1" command.
the "show spanning-tree issu-impact" non-edge, Criteria 3, check and this would have lead to a
disruptive upgrade. This northbound port-channel was listed not as a vPC Edge in the "show
spanning-tree vlan 1" command.
Loss of peer keepalive link
After the loss of the peer keepalive mgmt0 link no disruption in the traffic was recorded. In this
topology, the management interface (mgmt0) is used as keepalive link, hence does not impact the
data traffic generated during testing.
topology, the management interface (mgmt0) is used as keepalive link, hence does not impact the
data traffic generated during testing.
The devices notice mgmt0 interface going down, and peer keepalives failing, but since peer link is
up data place communication can continue.
up data place communication can continue.
bdsol-n5548-08# show int ethernet 1/1-2 | i rate
30 seconds input rate 5623248 bits/sec, 9489 packets/sec
30 seconds output rate 7036030160 bits/sec, 577861 packets/sec
input rate 2.83 Mbps, 4.74 Kpps; output rate 3.54 Gbps, 290.64 Kpps
30 seconds input rate 7036025712 bits/sec, 577854 packets/sec
30 seconds output rate 5627216 bits/sec, 9498 packets/sec
input rate 3.54 Gbps
, 290.64 Kpps; output rate 2.83 Mbps, 4.75 Kpps
Disabling vPC feature
This test will describe what happens when vPC is disabled on one of the switches during live data
transfer.
transfer.
VPC feature can be disabled using the following command in the global configuration mode:
bdsol-n5548-08# show int ethernet 1/1-2 | i rate
30 seconds input rate 5623248 bits/sec, 9489 packets/sec
30 seconds output rate 7036030160 bits/sec, 577861 packets/sec
input rate 2.83 Mbps, 4.74 Kpps; output rate 3.54 Gbps, 290.64 Kpps
30 seconds input rate 7036025712 bits/sec, 577854 packets/sec
30 seconds output rate 5627216 bits/sec, 9498 packets/sec
input rate 3.54 Gbps
, 290.64 Kpps; output rate 2.83 Mbps, 4.75 Kpps
Disabling the vPC feature on either primary or secondary vPC peer leads to instant loss of data
connectivity. This is due to the peer based nature of vPC. As soon as the feature is disabled, all
vPC functionality on the switch ceases to function, the peer link goes down, vPC keepalive status
is Suspended and port-channel 101 of the testing environment goes down. This is evident in the
show vPC output of the peer switch which still has vPC feature enabled.
connectivity. This is due to the peer based nature of vPC. As soon as the feature is disabled, all
vPC functionality on the switch ceases to function, the peer link goes down, vPC keepalive status
is Suspended and port-channel 101 of the testing environment goes down. This is evident in the
show vPC output of the peer switch which still has vPC feature enabled.
bdsol-n5548-08# show int ethernet 1/1-2 | i rate
30 seconds input rate 5623248 bits/sec, 9489 packets/sec
30 seconds output rate 7036030160 bits/sec, 577861 packets/sec