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jogentry
Beginner

VPC down/port-channel down

I have a pair of Nexus 5548s in the lab. I'm trying to build a VPC to a C220M3 using a P81E adapter. I cannot get the int port-channel 30/vpc 30 to come up. Any ideas?

B5548# show vpc
Legend:
                (*) - local vPC is down, forwarding via vPC peer-link

vPC domain id                   : 1  
Peer status                     : peer adjacency formed ok     
vPC keep-alive status           : peer is alive                
Configuration consistency status: success
Per-vlan consistency status     : success                      
Type-2 consistency status       : success
vPC role                        : secondary                    
Number of vPCs configured       : 1  
Peer Gateway                    : Enabled
Peer gateway excluded VLANs     : -
Dual-active excluded VLANs      : -
Graceful Consistency Check      : Enabled

vPC Peer-link status
---------------------------------------------------------------------
id   Port   Status Active vlans   
--   ----   ------ --------------------------------------------------
1    Po56   up     1-5,90-93                                                

vPC status
----------------------------------------------------------------------------
id     Port        Status Consistency Reason                     Active vlans
------ ----------- ------ ----------- -------------------------- -----------
30     Po30        down*  Not         Consistency Check Not      -          
                          Applicable  Performed                             

B5548#


A5548# show vpc
Legend:
                (*) - local vPC is down, forwarding via vPC peer-link

vPC domain id                   : 1  
Peer status                     : peer adjacency formed ok     
vPC keep-alive status           : peer is alive                
Configuration consistency status: success
Per-vlan consistency status     : success                      
Type-2 consistency status       : success
vPC role                        : primary                      
Number of vPCs configured       : 1  
Peer Gateway                    : Enabled
Peer gateway excluded VLANs     : -
Dual-active excluded VLANs      : -
Graceful Consistency Check      : Enabled

vPC Peer-link status
---------------------------------------------------------------------
id   Port   Status Active vlans   
--   ----   ------ --------------------------------------------------
1    Po56   up     1-5,90-93                                               

vPC status
----------------------------------------------------------------------------
id     Port        Status Consistency Reason                     Active vlans
------ ----------- ------ ----------- -------------------------- -----------
30     Po30        down*  success     success                    -         

A5548#

A5548# show port-channel sum
Flags:  D - Down        P - Up in port-channel (members)
        I - Individual  H - Hot-standby (LACP only)
        s - Suspended   r - Module-removed
        S - Switched    R - Routed
        U - Up (port-channel)
        M - Not in use. Min-links not met
--------------------------------------------------------------------------------
Group Port-       Type     Protocol  Member Ports
      Channel
--------------------------------------------------------------------------------
1     Po1(SU)     Eth      LACP      Eth1/1(P)    Eth1/2(P)   
30    Po30(SD)    Eth      LACP      Eth1/19(I)  
56    Po56(SU)    Eth      LACP      Eth1/5(P)    Eth1/6(P)   

A5548#

B5548# show port-channel sum
Flags:  D - Down        P - Up in port-channel (members)
        I - Individual  H - Hot-standby (LACP only)
        s - Suspended   r - Module-removed
        S - Switched    R - Routed
        U - Up (port-channel)
        M - Not in use. Min-links not met
--------------------------------------------------------------------------------
Group Port-       Type     Protocol  Member Ports
      Channel
--------------------------------------------------------------------------------
30    Po30(SD)    Eth      LACP      Eth1/19(I)  
56    Po56(SU)    Eth      LACP      Eth1/5(P)    Eth1/6(P)   
B5548#

B5548# show interface port-channel 30
port-channel30 is down (No operational members)
vPC Status: Down, vPC number: 30 [packets forwarded via vPC peer-link]
  Hardware: Port-Channel, address: 547f.ee69.731a (bia 547f.ee69.731a)
  MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec
  reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA
  Port mode is trunk
  auto-duplex, 10 Gb/s
  Input flow-control is off, output flow-control is off
  Switchport monitor is off
  EtherType is 0x8100
  Members in this channel: Eth1/19
  Last clearing of "show interface" counters never
  30 seconds input rate 368 bits/sec, 0 packets/sec
  30 seconds output rate 2512 bits/sec, 2 packets/sec
  Load-Interval #2: 5 minute (300 seconds)
    input rate 288 bps, 0 pps; output rate 2.19 Kbps, 2 pps
  RX
    17289 unicast packets  174964 multicast packets  9 broadcast packets
    192262 input packets  51829904 bytes
    0 jumbo packets  0 storm suppression bytes
    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
    23317 unicast packets  10791379 multicast packets  10560530 broadcast packets
    21375226 output packets  1937824969 bytes
    100 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
  0 interface resets

B5548#

2 REPLIES 2
dontsull
Cisco Employee

After a Year and some change I would've hoped there would be a solution to this. i just encountered the same issue myself. Doesn't make any sense. No mismatch on the VPC parameters. The individual link is up/up but the port-channel won't come up. 

What is connected to the other side of the ports? What do you see when you using the following command:

 sho lacp counters interface port-channel 30