I've got multiple port-channels configured between 2 Nexus 5672's to 9 different closets containing either 1 or upto 3 Cisco 3850 switches. Each closet has 2 fiber 10G SFP's uplinking it to each of the Nexus 5672 switches in the core. All uplink's and port-channels are working correctly except for one of my IDF's. The port configurations of all three of the devices (2 Nexus 5672's and 1 Cisco 3850) along with log entries and interface status are shown below. I can't seem to figure out why the port-channel for this IDF isn't working. In addition to the output provided below, I've also replaced the SFP on both sides of the link along with fiber cabling being used between the Nexus 5672 and the Cisco 3850.
My configuration –
Nexus 5672-1 10G SFP (eth1/18) connected via fiber to Cisco 3850-idf4 10G SFP (te1/1/3)
Nexus 5672-2 10G SFP (eth1/18) connected via fiber to Cisco 3850-idf4 10G SFP (te1/1/4)
Nexus 5672-1 config –
interface port-channel18
description tx502-sw3850-idf4
switchport mode trunk
speed 10000
vpc 18
interface Ethernet1/18
description tx502-sw3850-idf4 Te1/1/3
switchport mode trunk
channel-group 18 mode active
no shutdown
Nexus 5672-2 config –
interface port-channel18
description tx502-sw3850-idf4
switchport mode trunk
speed 10000
vpc 18
interface Ethernet1/18
description tx502-sw3850-idf4 Te1/1/4
switchport mode trunk
channel-group 18 mode active
no shutdown
Cisco 3850 config –
interface Port-channel1
switchport mode trunk
interface TenGigabitEthernet1/1/3
switchport mode trunk
channel-group 1 mode active
!
interface TenGigabitEthernet1/1/4
switchport mode trunk
channel-group 1 mode active
Output from “show interface status” on Cisco 3850 –
Te1/1/3 suspended trunk full 10G SFP-10GBase-SR
Te1/1/4 connected trunk full 10G SFP-10GBase-SR
Po1 connected trunk a-full 10G
Log entries from Cisco 3850 -
Sep 2 13:46:58.328: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/3, changed state to down
Sep 2 13:48:18.217: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/3, changed state to up
Sep 2 13:48:27.427: %EC-5-L3DONTBNDL2: Te1/1/3 suspended: LACP currently not enabled on the remote port.
Output from “show interface status” on Nexus 5672-1 –
Eth1/18 tx502-sw3850-idf4 htStdbyIn trunk full 10G 10Gbase-SR
Po18 tx502-sw3850-idf4 noOperMem trunk full 10G --
Log entries from Nexus 5672-1 –
2016 Sep 5 09:08:59 tx502-nx5672-dc1-1 %ETHPORT-5-SPEED: Interface port-channel18, operational speed changed to 10 Gbps
2016 Sep 5 09:08:59 tx502-nx5672-dc1-1 %ETHPORT-5-IF_DUPLEX: Interface port-channel18, operational duplex mode changed to Full
2016 Sep 5 09:08:59 tx502-nx5672-dc1-1 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface port-channel18, operational Receive Flow Control state changed to off
2016 Sep 5 09:08:59 tx502-nx5672-dc1-1 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface port-channel18, operational Transmit Flow Control state changed to off
2016 Sep 5 09:09:24 tx502-nx5672-dc1-1 %ETH_PORT_CHANNEL-5-PORT_HOT_STANDBY: port-channel18: Ethernet1/18 goes to hot-standby
Output from “show interface status” on Nexus 5672-2 –
Eth1/18 tx502-sw3850-idf4 connected trunk full 10G 10Gbase-SR
Po18 tx502-sw3850-idf4 connected trunk full 10G --
