Good morning,
I have 2 Nexus 7k that share a VPC. This VPC is composed by 2 int, one to Nexus A and other one to Nexus B.
This VPC has been working for years, but yesterday one link goes down for a LACP issue:
NexusA# show lacp interface Eth9/5
Interface Ethernet9/5 is suspended
Channel group is 320 port channel is Po320
PDUs sent: 2644275
PDUs rcvd: 2854056
Markers sent: 0
Markers rcvd: 0
Marker response sent: 0
Marker response rcvd: 0
Unknown packets rcvd: 0
Illegal packets rcvd: 0
Lag Id: [ [(0, 0-0-0-0-0-0, 0, 0, 0), (0, 0-0-0-0-0-0, 0, 0, 0)] ]
Operational as aggregated link since Tue Jul 30 17:50:20 2019
Local Port: Eth9/5 MAC Address= 40-55-39-27-e3-c1
System Identifier=0x8000, Port Identifier=0x8000,0x905
Operational key=33088
LACP_Activity=active
LACP_Timeout=Long Timeout (30s)
Synchronization=NOT_IN_SYNC
Collecting=false
Distributing=false
Partner information refresh timeout=Long Timeout (90s)
Actor Admin State=69
Actor Oper State=69
Neighbor: 0x0
MAC Address= 0-0-0-0-0-0
System Identifier=0x0, Port Identifier=0x0,0x0
Operational key=0
LACP_Activity=unknown
LACP_Timeout=Long Timeout (30s)
Synchronization=NOT_IN_SYNC
Collecting=false
Distributing=false
Partner Admin State=0
Partner Oper State=0
Aggregate or Individual(True=1)= 2
NexusB# show lacp interf eth9/5
Interface Ethernet9/5 is up
Channel group is 320 port channel is Po320
PDUs sent: 2626618
PDUs rcvd: 2839385
Markers sent: 0
Markers rcvd: 0
Marker response sent: 0
Marker response rcvd: 0
Unknown packets rcvd: 0
Illegal packets rcvd: 0
Lag Id: [ [(3e8, 0-23-4-ee-be-a, 8140, 8000, 905), (8000, 0-d6-fe-55-24-80, 1, 8000, 21)] ]
Operational as aggregated link since Tue Dec 15 18:23:13 2020
Local Port: Eth9/5 MAC Address= e4-c7-22-18-72-c1
System Identifier=0x8000, Port Identifier=0x8000,0x905
Operational key=33088
LACP_Activity=active
LACP_Timeout=Long Timeout (30s)
Synchronization=IN_SYNC
Collecting=true
Distributing=true
Partner information refresh timeout=Long Timeout (90s)
Actor Admin State=61
Actor Oper State=61
Neighbor: 0x21
MAC Address= 0-d6-fe-55-24-80
System Identifier=0x8000, Port Identifier=0x8000,0x21
Operational key=1
LACP_Activity=active
LACP_Timeout=Long Timeout (30s)
Synchronization=IN_SYNC
Collecting=true
Distributing=true
Partner Admin State=61
Partner Oper State=61
Aggregate or Individual(True=1)= 1
Interfaces config are the same on Nexus A and B:
NexusA/B# show run int eth9/5
!Command: show running-config interface Ethernet9/5
!Time: Wed Dec 16 13:16:10 2020
version 6.2(8b)
interface Ethernet9/5
switchport
switchport mode trunk
channel-group 320 mode active
no shutdown
NexusA/B# show run int po320
!Command: show running-config interface port-channel320
!Time: Wed Dec 16 13:16:18 2020
version 6.2(8b)
interface port-channel320
switchport
switchport mode trunk
vpc 320
These Nexus are connected to a Cisco router ISR4331/K9, and on this side I have interfaces Gi0/1/0 and Gi0/1/1 members of port-channel 1. Gi0/1/0 is attached to Nexus B, the other one to Nexus A:
Port Flags State Priority Key Key Number State
Gi0/1/0 SA bndl 32768 0x1 0x1 0x21 0x3D
Gi0/1/1 SA susp 32768 0x1 0x1 0x22 0x7D
I tried to:
- shut/no shut Nexus and router interface
- shut/no shut port-channel
- delete config from eth9/5 from Nexus A
- config eth9/5 on a new Port-channel with new ID
- change SFP
- change fibre cable
But nothing change.
Any ideas?
Kind regards.
