vPC is down between cisco Nexus 3k and cisco Nexus 9k

[cfchiang]

From the image, we are actually add on two N9K switches.

1. We have chuck in the red cable and we try to configure VPC it showed error as port-channel110 is down (No operational members)

2. We have try another method not using VPC, We jus trunk it at both side switch ---> Then is ok, have no issue.

is both side Port-channel configuration.
N9K
====
interface port-channel110
switchport
switchport mode trunk
switchport trunk allowed vlan 461-468,1231-1233,1280-1283,2120-2121,2222
vpc 110

interface Ethernet1/29
switchport
switchport mode trunk
switchport trunk allowed vlan 461-468,1231-1233,1280-1283,2120-2121,2222
channel-group 110 mode active
no shutdown

N3K
===

interface port-channel110
switchport mode trunk
switchport trunk allowed vlan 461-468,1231-1233,1280-1283,2120-2121,2222
speed 40000
vpc 110

interface Ethernet1/51
switchport mode trunk
switchport trunk allowed vlan 461-468,1231-1233,1280-1283,2120-2121,2222
channel-group 110 mode active

[balaji.bandi]

is this config both the nexus9K and nexus3K identical ?

Looks some STP  issue, is the VLAN allowed in the vPC between nexus 9K and between 3K?

when you bring up port-channel 110 with vPC, can you check the logs on both the nexus ?

post below output from both the side ?

show vpc

show port-channel summary

show interface ethe 1/51 and 1/29 ?

[cfchiang]

Dear Balaji,

Kindly find below attachment for output.

[balaji.bandi]

One side you have setup up speed of 40GB - other side not (may be worth adding and test it)

peer does not have corresponding vpc  - may be worth redoing the config, by putting the speed config again

what is the Logs show when you bring up the Port-channel between devices ?

[cfchiang]

1. peer does not have corresponding vpc  - may be worth redoing the config, by putting the speed config again
Shall I re-setup the peer link?

2. what is the Logs show when you bring up the Port-channel between devices ?
How can i retrieve ya

Thank you.

[balaji.bandi]

Shall I re-setup the peer link?

not peer link, i mean port-channel 110 - recreate.

How can i retrieve ya

when you enabling port-channel 110 ( no shutdown)

look at the nexus 3K and 9K side below output see the logs

show logging last 50 (this show last 50lines ) - increase this to see more lines

[cfchiang]

N9k
===
SW-NEXUS9K-1FC17-02(config-if)# show logging last 50
2022 Jan 19 17:09:25 SW-NEXUS9K-1FC17-02 %ETH_PORT_CHANNEL-5-FOP_CHANGED: port-channel110: first operational port changed from none to Ethernet1/29
2022 Jan 19 17:09:25 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_BANDWIDTH_CHANGE: Interface port-channel110,bandwidth changed to 40000000 Kbit
2022 Jan 19 17:09:25 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_UP: Interface Ethernet1/29 is up in mode trunk
2022 Jan 19 17:09:25 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_UP: Interface port-channel110 is up in mode trunk
2022 Jan 19 17:09:33 SW-NEXUS9K-1FC17-02 %ETH_PORT_CHANNEL-5-FOP_CHANGED: port-channel110: first operational port changed from Ethernet1/29 to none
2022 Jan 19 17:09:33 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN: Interface port-channel110 is down (No operational members)
2022 Jan 19 17:09:33 SW-NEXUS9K-1FC17-02 %ETH_PORT_CHANNEL-5-PORT_DOWN: port-channel110: Ethernet1/29 is down
2022 Jan 19 17:09:33 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_BANDWIDTH_CHANGE: Interface port-channel110,bandwidth changed to 100000 Kbit
2022 Jan 19 17:09:33 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet1/29 is down (Link failure)
2022 Jan 19 17:09:33 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN: Interface port-channel110 is down (No operational members)
2022 Jan 19 17:09:34 SW-NEXUS9K-1FC17-02 %ETHPORT-5-SPEED: Interface Ethernet1/29, operational speed changed to 40 Gbps
2022 Jan 19 17:09:34 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DUPLEX: Interface Ethernet1/29, operational duplex mode changed to Full
2022 Jan 19 17:09:34 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/29, operational Receive Flow Control state changed to off
2022 Jan 19 17:09:34 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/29, operational Transmit Flow Control state changed to off
2022 Jan 19 17:09:34 SW-NEXUS9K-1FC17-02 %ETHPORT-5-SPEED: Interface port-channel110, operational speed changed to 40 Gbps
2022 Jan 19 17:09:34 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DUPLEX: Interface port-channel110, operational duplex mode changed to Full
2022 Jan 19 17:09:34 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface port-channel110, operational Receive Flow Control state changed to off
2022 Jan 19 17:09:34 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface port-channel110, operational Transmit Flow Control state changed to off
2022 Jan 19 17:09:37 SW-NEXUS9K-1FC17-02 %ETH_PORT_CHANNEL-5-PORT_UP: port-channel110: Ethernet1/29 is up
2022 Jan 19 17:09:37 SW-NEXUS9K-1FC17-02 %ETH_PORT_CHANNEL-5-FOP_CHANGED: port-channel110: first operational port changed from none to Ethernet1/29
2022 Jan 19 17:09:37 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_BANDWIDTH_CHANGE: Interface port-channel110,bandwidth changed to 40000000 Kbit
2022 Jan 19 17:09:37 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_UP: Interface Ethernet1/29 is up in mode trunk
2022 Jan 19 17:09:37 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_UP: Interface port-channel110 is up in mode trunk
2022 Jan 19 17:10:27 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DOWN_NONE: Interface port-channel110 is down (None)
2022 Jan 19 17:10:27 SW-NEXUS9K-1FC17-02 %ETH_PORT_CHANNEL-5-FOP_CHANGED: port-channel110: first operational port changed from Ethernet1/29 to none
2022 Jan 19 17:10:27 SW-NEXUS9K-1FC17-02 %ETH_PORT_CHANNEL-5-PORT_DOWN: port-channel110: Ethernet1/29 is down
2022 Jan 19 17:10:27 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DOWN_NONE: Interface port-channel110 is down (None)
2022 Jan 19 17:10:27 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_BANDWIDTH_CHANGE: Interface port-channel110,bandwidth changed to 100000 Kbit
2022 Jan 19 17:10:27 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DOWN_CFG_CHANGE: Interface Ethernet1/29 is down(Config change)
2022 Jan 19 17:10:27 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DOWN_NONE: Interface Ethernet1/29 is down (None)
2022 Jan 19 17:10:27 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN: Interface port-channel110 is down (No operational members)
2022 Jan 19 17:10:29 SW-NEXUS9K-1FC17-02 %ETHPORT-5-SPEED: Interface Ethernet1/29, operational speed changed to 40 Gbps
2022 Jan 19 17:10:29 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DUPLEX: Interface Ethernet1/29, operational duplex mode changed to Full
2022 Jan 19 17:10:29 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/29, operational Receive Flow Control state changed to off
2022 Jan 19 17:10:29 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/29, operational Transmit Flow Control state changed to off
2022 Jan 19 17:10:29 SW-NEXUS9K-1FC17-02 %ETHPORT-5-SPEED: Interface port-channel110, operational speed changed to 40 Gbps
2022 Jan 19 17:10:29 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DUPLEX: Interface port-channel110, operational duplex mode changed to Full
2022 Jan 19 17:10:29 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface port-channel110, operational Receive Flow Control state changed to off
2022 Jan 19 17:10:29 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface port-channel110, operational Transmit Flow Control state changed to off
2022 Jan 19 17:13:09 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DOWN_CFG_CHANGE: Interface port-channel110 is down(Config change)
2022 Jan 19 17:13:09 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN: Interface port-channel110 is down (No operational members)
2022 Jan 19 17:14:03 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN: Interface port-channel110 is down (No operational members) (message repeated 2 ti
mes)
2022 Jan 19 17:14:03 SW-NEXUS9K-1FC17-02 %ETHPORT-5-SPEED: Interface Ethernet1/29, operational speed changed to 40 Gbps
2022 Jan 19 17:14:03 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DUPLEX: Interface Ethernet1/29, operational duplex mode changed to Full
2022 Jan 19 17:14:03 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/29, operational Receive Flow Control state changed to off
2022 Jan 19 17:14:03 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/29, operational Transmit Flow Control state changed to off
2022 Jan 19 17:14:03 SW-NEXUS9K-1FC17-02 %ETHPORT-5-SPEED: Interface port-channel110, operational speed changed to 40 Gbps
2022 Jan 19 17:14:03 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_DUPLEX: Interface port-channel110, operational duplex mode changed to Full
2022 Jan 19 17:14:03 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface port-channel110, operational Receive Flow Control state changed to off
2022 Jan 19 17:14:03 SW-NEXUS9K-1FC17-02 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface port-channel110, operational Transmit Flow Control state changed to off

============================================================================================

N3k 
===
SW-NX3K-1FC17-02(config-if)# show logging last 50
2014 Jan 12 15:43:04 SW-NX3K-1FC17-02 last message repeated 1 time
2014 Jan 12 15:43:04 SW-NX3K-1FC17-02 %ETH_PORT_CHANNEL-5-PORT_DOWN: port-channel110: Ethernet1/51 is down
2014 Jan 12 15:43:04 SW-NX3K-1FC17-02 %ETH_PORT_CHANNEL-5-PORT_DOWN: port-channel110: port-channel110 is down
2014 Jan 12 15:43:04 SW-NX3K-1FC17-02 %ETH_PORT_CHANNEL-5-FOP_CHANGED: port-channel110: first operational port changed from Ethernet1/51 to none
2014 Jan 12 15:43:04 SW-NX3K-1FC17-02 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN: Interface port-channel110 is down (No operational members)
2014 Jan 12 15:43:04 SW-NX3K-1FC17-02 %ETHPORT-5-IF_DOWN_CFG_CHANGE: Interface Ethernet1/51 is down(Config change)
2014 Jan 12 15:43:06 SW-NX3K-1FC17-02 last message repeated 1 time
2014 Jan 12 15:43:06 SW-NX3K-1FC17-02 %ETHPORT-5-SPEED: Interface Ethernet1/51, operational speed changed to 40 Gbps
2014 Jan 12 15:43:06 SW-NX3K-1FC17-02 %ETHPORT-5-IF_DUPLEX: Interface Ethernet1/51, operational duplex mode changed to Full
2014 Jan 12 15:43:06 SW-NX3K-1FC17-02 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/51, operational Receive Flow Control state changed to off
2014 Jan 12 15:43:06 SW-NX3K-1FC17-02 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/51, operational Transmit Flow Control state changed to off
2014 Jan 12 15:43:06 SW-NX3K-1FC17-02 %ETHPORT-5-SPEED: Interface port-channel110, operational speed changed to 40 Gbps
2014 Jan 12 15:43:06 SW-NX3K-1FC17-02 %ETHPORT-5-IF_DUPLEX: Interface port-channel110, operational duplex mode changed to Full
2014 Jan 12 15:43:06 SW-NX3K-1FC17-02 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface port-channel110, operational Receive Flow Control state changed to off
2014 Jan 12 15:43:06 SW-NX3K-1FC17-02 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface port-channel110, operational Transmit Flow Control state changed to off
2014 Jan 12 15:43:09 SW-NX3K-1FC17-02 %ETH_PORT_CHANNEL-5-PORT_UP: port-channel110: Ethernet1/51 is up
2014 Jan 12 15:43:09 SW-NX3K-1FC17-02 %ETH_PORT_CHANNEL-5-FOP_CHANGED: port-channel110: first operational port changed from none to Ethernet1/51
2014 Jan 12 15:43:09 SW-NX3K-1FC17-02 %ETHPORT-5-IF_UP: Interface Ethernet1/51 is up in mode trunk
2014 Jan 12 15:43:09 SW-NX3K-1FC17-02 %ETHPORT-5-IF_UP: Interface port-channel110 is up in mode trunk
2014 Jan 12 15:43:59 SW-NX3K-1FC17-02 %ETH_PORT_CHANNEL-5-FOP_CHANGED: port-channel110: first operational port changed from Ethernet1/51 to none
2014 Jan 12 15:43:59 SW-NX3K-1FC17-02 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN: Interface port-channel110 is down (No operational members)
2014 Jan 12 15:43:59 SW-NX3K-1FC17-02 %ETH_PORT_CHANNEL-5-PORT_DOWN: port-channel110: Ethernet1/51 is down
2014 Jan 12 15:43:59 SW-NX3K-1FC17-02 %ETH_PORT_CHANNEL-5-PORT_DOWN: port-channel110: port-channel110 is down
2014 Jan 12 15:43:59 SW-NX3K-1FC17-02 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet1/51 is down (Link failure)
2014 Jan 12 15:43:59 SW-NX3K-1FC17-02 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN: Interface port-channel110 is down (No operational members)
2014 Jan 12 15:44:01 SW-NX3K-1FC17-02 %ETHPORT-5-SPEED: Interface Ethernet1/51, operational speed changed to 40 Gbps
2014 Jan 12 15:44:01 SW-NX3K-1FC17-02 %ETHPORT-5-IF_DUPLEX: Interface Ethernet1/51, operational duplex mode changed to Full
2014 Jan 12 15:44:01 SW-NX3K-1FC17-02 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/51, operational Receive Flow Control state changed to off
2014 Jan 12 15:44:01 SW-NX3K-1FC17-02 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/51, operational Transmit Flow Control state changed to off
2014 Jan 12 15:44:01 SW-NX3K-1FC17-02 %ETHPORT-5-SPEED: Interface port-channel110, operational speed changed to 40 Gbps
2014 Jan 12 15:44:01 SW-NX3K-1FC17-02 %ETHPORT-5-IF_DUPLEX: Interface port-channel110, operational duplex mode changed to Full
2014 Jan 12 15:44:01 SW-NX3K-1FC17-02 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface port-channel110, operational Receive Flow Control state changed to off
2014 Jan 12 15:44:01 SW-NX3K-1FC17-02 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface port-channel110, operational Transmit Flow Control state changed to off
2014 Jan 12 15:44:04 SW-NX3K-1FC17-02 %ETH_PORT_CHANNEL-5-PORT_UP: port-channel110: Ethernet1/51 is up
2014 Jan 12 15:44:04 SW-NX3K-1FC17-02 %ETH_PORT_CHANNEL-5-PORT_DOWN: port-channel110: Ethernet1/51 is down
2014 Jan 12 15:44:04 SW-NX3K-1FC17-02 %ETH_PORT_CHANNEL-5-FOP_CHANGED: port-channel110: first operational port changed from Ethernet1/51 to none
2014 Jan 12 15:44:04 SW-NX3K-1FC17-02 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN: Interface port-channel110 is down (No operational members)
2014 Jan 12 15:44:04 SW-NX3K-1FC17-02 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet1/51 is down (Link failure)
2014 Jan 12 15:44:07 SW-NX3K-1FC17-02 last message repeated 1 time
2014 Jan 12 15:44:07 SW-NX3K-1FC17-02 %ETHPORT-5-IF_DOWN_NONE: Interface Ethernet1/51 is down (None)
2014 Jan 12 15:44:07 SW-NX3K-1FC17-02 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN: Interface port-channel110 is down (No operational members)
2014 Jan 12 15:47:33 SW-NX3K-1FC17-02 last message repeated 1 time
2014 Jan 12 15:47:35 SW-NX3K-1FC17-02 %ETHPORT-5-SPEED: Interface Ethernet1/51, operational speed changed to 40 Gbps
2014 Jan 12 15:47:35 SW-NX3K-1FC17-02 %ETHPORT-5-IF_DUPLEX: Interface Ethernet1/51, operational duplex mode changed to Full
2014 Jan 12 15:47:35 SW-NX3K-1FC17-02 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/51, operational Receive Flow Control state changed to off
2014 Jan 12 15:47:35 SW-NX3K-1FC17-02 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/51, operational Transmit Flow Control state changed to off
2014 Jan 12 15:47:35 SW-NX3K-1FC17-02 %ETHPORT-5-SPEED: Interface port-channel110, operational speed changed to 40 Gbps
2014 Jan 12 15:47:35 SW-NX3K-1FC17-02 %ETHPORT-5-IF_DUPLEX: Interface port-channel110, operational duplex mode changed to Full
2014 Jan 12 15:47:35 SW-NX3K-1FC17-02 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface port-channel110, operational Receive Flow Control state changed to off
2014 Jan 12 15:47:35 SW-NX3K-1FC17-02 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface port-channel110, operational Transmit Flow Control state changed to off
SW-NX3K-1FC17-02(config-if)#

[cfchiang]

I have try re create int po 110. Still same issue.

[balaji.bandi]

Ethernet1/29 is down (vpc compatibility check failed)

where is the logs which was requested ?