Port-channel physical interface not up

dbuckley77 · ‎06-09-2015

Port channel not working between two Nexus 3000 switches.

I setup a port channel with two interfaces on each end and assigned the interfaces to the port-channel but only one is showing up. I have looked at everything on the other interface and everything seems to be setup correctly: speed and duplex match (gig/full), both ends are in PO4, cable has been put in place connecting them, niether is admin down....... I'm missing something.

here is the out put from one end

CH-SAN1-NX3K# sh int eth1/45
Ethernet1/45 is down (Link not connected)
Dedicated Interface
Belongs to Po4
Hardware: 100/1000/10000 Ethernet, address: e4d3.f1d2.8434 (bia e4d3.f1d2.8434)
Description: Link to CH-SAN2-NX3K Eth1/45
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA
Port mode is access
Full-duplex, 1000 Mb/s
Beacon is turned off
Input flow-control is off, output flow-control is off
Switchport monitor is off
EtherType is 0x8100
Last link flapped never
Last clearing of "show interface" counters 00:15:18
0 interface resets
30 seconds input rate 0 bits/sec, 0 packets/sec
30 seconds output rate 0 bits/sec, 0 packets/sec
Load-Interval #2: 5 minute (300 seconds)
    input rate 0 bps, 0 pps; output rate 0 bps, 0 pps
RX
    0 unicast packets 0 multicast packets 0 broadcast packets
    0 input packets 0 bytes
    0 jumbo packets 0 storm suppression packets
    0 runts 0 giants 0 CRC 0 no buffer
    0 input error 0 short frame 0 overrun   0 underrun 0 ignored
    0 watchdog 0 bad etype drop 0 bad proto drop 0 if down drop
    0 input with dribble 0 input discard
    0 Rx pause
TX
    0 unicast packets 0 multicast packets 0 broadcast packets
    0 output packets 0 bytes
    0 jumbo packets
    0 output errors 0 collision 0 deferred 0 late collision
    0 lost carrier 0 no carrier 0 babble 0 output discard
    0 Tx pause

also:

CH-SAN1-NX3K# sh lacp interface eth1/45
Interface Ethernet1/45 is invalid
Channel group is 0 port channel is
PDUs sent: 0
PDUs rcvd: 0
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 Thu Jan 1 00:00:00 1970

Local Port: Eth1/45 MAC Address= 0-0-0-0-0-0
System Identifier=0x8000,0-0-0-0-0-0
Port Identifier=0x8000,0x0
Operational key=0
LACP_Activity=passive
LACP_Timeout=Long Timeout (30s)
Synchronization=NOT_IN_SYNC
Collecting=false
Distributing=false
Partner information refresh timeout=Long Timeout (90s)
Actor Admin State=(Ac-0:To-0:Ag-0:Sy-0:Co-0:Di-0:De-0:Ex-0)
Actor Oper State=(Ac-0:To-0:Ag-0:Sy-0:Co-0:Di-0:De-0:Ex-0)
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=(Ac-0:To-0:Ag-0:Sy-0:Co-0:Di-0:De-0:Ex-0)
Partner Oper State=(Ac-0:To-0:Ag-0:Sy-0:Co-0:Di-0:De-0:Ex-0)
Aggregate or Individual(True=1)= 2

dbuckley77 · ‎06-09-2015

Neither end had graceful-convergence disabled so I disabled it at both ends and the interface that had been up went into suspend while the one that was down stayed down. The I re-enabled it on end and the interface that had been up came back up while the other remained down.

Mark Malone · ‎06-09-2015

Hi Is this a fex or just vpc your setting up ? can you post the run config of the po and member interfaces

dbuckley77 · ‎06-09-2015

I'm not sure what you mean by fex or vpc but I have posted the sh runs for the po and member interfaces of both ends below.

Switch 1:

CH-SAN1-NX3K# sh run int po4

!Command: show running-config interface port-channel4
!Time: Tue Jun 9 12:47:53 2015

version 6.0(2)U3(1)

interface port-channel4
description Link to CH-SAN2-NX3K
switchport access vlan 7
spanning-tree port type network
speed 1000

CH-SAN1-NX3K# sh run int eth1/47

!Command: show running-config interface Ethernet1/47
!Time: Tue Jun 9 12:47:58 2015

version 6.0(2)U3(1)

interface Ethernet1/47
description Link to CH-SAN2-NX3K Eth1/47
switchport access vlan 7
spanning-tree port type network
speed 1000
channel-group 4 mode active

CH-SAN1-NX3K# sh run int eth1/45

!Command: show running-config interface Ethernet1/45
!Time: Tue Jun 9 12:48:01 2015

version 6.0(2)U3(1)

interface Ethernet1/45
description Link to CH-SAN2-NX3K Eth1/45
switchport access vlan 7
spanning-tree port type network
speed 1000
channel-group 4 mode active

Switch 2:

CH-SAN2-NX3K# sh run int po4

!Command: show running-config interface port-channel4
!Time: Tue Jun 9 12:48:42 2015

version 6.0(2)U3(1)

interface port-channel4
description Link to CH-SAN1-NX3K
switchport access vlan 7
spanning-tree port type network
speed 1000

CH-SAN2-NX3K# sh run int eth1/47

!Command: show running-config interface Ethernet1/47
!Time: Tue Jun 9 12:48:57 2015

version 6.0(2)U3(1)

interface Ethernet1/47
description Link to CH-SAN1-NX3K Eth1/47
switchport access vlan 7
spanning-tree port type network
speed 1000
channel-group 4 mode active

CH-SAN2-NX3K# sh run int eth1/45

!Command: show running-config interface Ethernet1/45
!Time: Tue Jun 9 12:49:02 2015

version 6.0(2)U3(1)

interface Ethernet1/45
description Link to CH-SAN1-NX3K Eth1/45
switchport access vlan 7
spanning-tree port type network
speed 1000
channel-group 4 mode active

Mark Malone · ‎06-09-2015

That command below should only be on a PO if your connecting to another switch or your vpc peer link to another Nexus , what are you connecting to?

spanning-tree port type network

A fex is a fabric extender like a Nexus 2000 series , VPC is a virtual port-channel makes it look like 1 physical PO spread across switches

spanning-tree port type network

dbuckley77 · ‎06-09-2015

I have Nexus 3000 series at both ends of the link.

Mark Malone · ‎06-09-2015

Try set it as a vpc as its po spread across multiple switches

its 1 command under each port-channel vpc 4 see if that brings it up

http://www.cisco.com/c/en/us/products/collateral/switches/nexus-3000-series-switches/white_paper_c11-685753.html#_Toc331451452