Nexus 3548 peerlink BPDU timeout receive during nmap scans or transfer to/from switch

[dsheehanmcpl]

I have a pair of Nexus 3548's that during nmap scans of even a single host on any subnet or, even during the transfer of a bin file for upgrading the OS, I will get error like this in the secondary peer:

%STP-2-VPC_PEER_LINK_INCONSIST_BLOCK: vPC peer-link detected BPDU receive timeout blocking po10 vlan 100

then 

%STP-2-VPC_PEER_LINK_INCONSIST_UNBLOCK: vPC peer-link inconsistency cleared unblocking po10 vlan 100

po1 being the peer link (4x 10ge links)

I'll get this for random vlans on the peer link...  

Thing is, there is no inconsistency, I checked all parameters and consistency comparison commands as well.

The fact that even transferring a bin file to the switch triggers this is alarming.

Any ideas of what to look for or what would cause this?

We are running n3500-uk9.6.0.2.A8.11b on these switches (these are 3648p's a few years old)

Thanks

[balaji.bandi]

As per the below message, you have Spanning Tree configuration issue :

%STP-2-VPC_PEER_LINK_INCONSIST_BLOCK: vPC peer-link detected BPDU receive timeout blocking po10 vlan 100

Can you have both the switches configuration ? to verify and check what is wrong?

[dsheehanmcpl]

Posted the configs of each switch... Any help is appreciated. 

[dsheehanmcpl]

virtual1# show vpc consistency global

    Legend:
        Type 1 : vPC will be suspended in case of mismatch

Name                        Type  Local Value            Peer Value
-------------               ----  ---------------------- -----------------------
QoS                         2     ([], [], [], [], [],   ([], [], [], [], [],
                                  [], [], [])            [], [], [])
Network QoS (MTU)           2     (9216, 0, 0, 0, 0, 0,  (9216, 0, 0, 0, 0, 0,
                                  0, 0)                  0, 0)
Network Qos (Pause)         2     (F, F, F, F, F, F, F,  (F, F, F, F, F, F, F,
                                  F)                     F)
Network Qos (WRED)          2     (F, F, F, F, F, F, F,  (F, F, F, F, F, F, F,
                                  F)                     F)
Network Qos (ECN)           2     (F, F, F, F, F, F, F,  (F, F, F, F, F, F, F,
                                  F)                     F)
Output Queuing (Bandwidth)  2     (100, 0, 0, 0, 0, 0,   (100, 0, 0, 0, 0, 0,
                                  0, 0)                  0, 0)
Output Queuing (Absolute    2     (F, F, F, F, F, F, F,  (F, F, F, F, F, F, F,
Priority)                         F)                     F)
STP Mode                    1     Rapid-PVST             Rapid-PVST
STP Disabled                1     None                   None
STP MST Region Name         1     ""                     ""
STP MST Region Revision     1     0                      0
STP MST Region Instance to  1
 VLAN Mapping
STP Loopguard               1     Disabled               Disabled
STP Bridge Assurance        1     Enabled                Enabled
STP Port Type, Edge         1     Normal, Disabled,      Normal, Disabled,
BPDUFilter, Edge BPDUGuard        Disabled               Disabled
STP MST Simulate PVST       1     Enabled                Enabled
HW profile Forwarding Mode  1     normal                 normal
IGMP Snooping Group-Limit   2     8190                   8190
Interface-vlan admin up     2     37-38,301,570,577,590, 37-38,301,570,577,590,
                                  880,980-983,1030-1031, 880,980-983,1030-1031,
                                  1033,1035,1037-1038,10 1033,1035,1037-1038,10
                                  40,1045,1047,1050,1055 40,1045,1047,1050,1055
                                  ,1063,1070             ,1063,1070
Interface-vlan routing      2     1,37-38,301,333,411,57 1,37-38,301,333,411,57
capability                        0,577,590,880,980-983, 0,577,590,880,980-983,
                                  1030-1031,1033,1035,10 1030-1031,1033,1035,10
                                  37-1038,1040           37-1038,1040
Allowed VLANs               -     1,37-38,88,95-96,99,11 1,37-38,88,95-96,99,11
                                  8,126,150,195,199,219- 8,126,150,195,199,219-
                                  220,224,300-301,333,41 220,224,300-301,333,41
                                  1,500-501,520,560,570, 1,500-501,520,560,570,
                                  577,580,590,600,666,80 577,580,590,600,666,80
                                  1-805,880,980-983,1030 1-805,880,980-983,1030
                                  -1031,1033,1035,1037-1 -1031,1033,1035,1037-1
                                  038,1040,1045,1047,105 038,1040,1045,1047,105
                                  0,1055,1063,1070       0,1055,1063,1070
Local suspended VLANs       -     -                      -
virtual1#

virtual1# show vpc consistency-parameters vlans

Name                        Type  Reason Code             Pass Vlans
-------------               ----  ---------------------- -----------------------
STP Mode                    1     success                0-4095
STP Disabled                1     success                0-4095
STP MST Region Name         1     success                0-4095
STP MST Region Revision     1     success                0-4095
STP MST Region Instance to  1     success                0-4095
 VLAN Mapping
STP Loopguard               1     success                0-4095
STP Bridge Assurance        1     success                0-4095
STP Port Type, Edge         1     success                0-4095
BPDUFilter, Edge BPDUGuard
STP MST Simulate PVST       1     success                0-4095
Pass Vlans                  -                            0-4095