MACFLAP on two trunks - No loops, not sure what's going on. HELP!

[CPynch]

Here's the basic layout. 

Both cisco switches are flapping on ports 23 and 25 which are trunks. The MAC's exist on the 'right' side only. No router on the network, layer 2 only. 

Am I missing something simple? 

[CPynch]

Everything on the Ubiquiti switch stack is a flat network on VLAN1. There's a bunch of CCTV cameras and switches. Everything on the edge side of the Ubiquiti PoE switch is also VLAN 1, b2b bridge, couple cameras....

[NetworkDave]

CPynch,

Between the switches is there a single link, multiple links, or etherchannel links ?

Also, when did this problem start? New network, topology or configuration change, etc.?

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[CPynch]

Hey NetworkDave, thanks for the reply. Single link between all switches. Between the CISCO switches, there's a MM fiber connection. Between cisco and ubiquiti, there is a single ethernet conenction.

I came in Tuesday and things were wonky. Not sure what happened, but there's other issues as well that are ubiquiti related. Controller software isn't adopting devices properly, can't ping devices etc. The weirdest part is that the devices themselves, e.g. cameras across the network seem to be working fine.

[MHM Cisco World]

 ""Between the CISCO switches, there's a MM fiber connection.""
this give hint that may be the BPDU is not send/receive by SW.
do 

show spanning-tree interface gx/x detail

check the BPDU counter is it increase or not ?

also, check the CPU in both SW 

[CPynch]

Received is going up for sure. 

[MHM Cisco World]

I want to check BPDU in link interconnect cisco SW, 
please share output for that link/ports

[CPynch]

WAT-A00-CCTV-NCF1(config-if)#do show spanning-tree
Oct 13 14:29:13.196: %SW_MATM-4-MACFLAP_NOTIF: Host 68d7.9a69.1a97 in vlan 250 i s flapping between port Gi1/0/23 and port Gi1/0/25int gi1/0/25 detail
Port 25 (GigabitEthernet1/0/25) of VLAN0001 is designated forwarding
Port path cost 4, Port priority 128, Port Identifier 128.25.
Designated root has priority 32769, address 0056.2b74.2a80
Designated bridge has priority 32769, address 0056.2b74.2a80
Designated port id is 128.25, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 6
Link type is point-to-point by default, Peer is STP
BPDU: sent 48353, received 416
Oct 13 14:29:17.607: %SW_MATM-4-MACFLA

Port 25 (GigabitEthernet1/0/25) of VLAN0150 is designated forwarding
Port path cost 4, Port priority 128, Port Identifier 128.25.
Designated root has priority 32918, address 0056.2b74.2a80
Designated bridge has priority 32918, address 0056.2b74.2a80
Designated port id is 128.25, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default, Peer is STP
BPDU: sent 48667, receivedP_NOTIF: Host 68d7.9a69.1a97 in vlan 250 is flappin g between port Gi1/0/25 and port Gi1/0/23 5

Port 25 (GigabitEthernet1/0/25) of VLAN0250 is designated forwarding
Port path cost 4, Port priority 128, Port Identifier 128.25.
Designated root has priority 32768, address 0042.5a3a.daf1
Designated bridge has priority 33018, address 0056.2b74.2a80
Designated port id is 128.25, designated path cost 42008
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default, Peer is STP
BPDU: sent 59, received 3

[MHM Cisco World]

this one SW other SW, please share output for same command 

[NetworkDave]

CPynch,

Ok, no etherchannel and no redundant links. Though check STP, just in case.

What type of devices do the MACs belong to? Do the devices have a wired or wireless connection? Are any servers? Do any of the devices have multipe connections to a switch or links to multiple switches?

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[CPynch]

The MAC's are a B2B bridge (Ubiquiti) a Dell PC, and a switch. Everything is wired. No servers, no multiple connections. 

[CPynch]

Here's the CPU info

[andrewswanson]

Hi
Your network diagram has the trunk between the Cisco switches labelled as "Native vlan 2".

Is that a typo? I couldn't see any switchport trunk native vlan 2 command in your config.

Andy

[CPynch]

Sorry, I've been changing things to try and get this working. 

I set the camera network to VLAN 250, and the FOSSIL network to 150, and set native VLAN to 1. 

I'm going to pull some new info from both switches, but I can't communicate with the switches over the network for whatever reason, so I have to manually go to the locations with a console cable. 

[MHM Cisco World · Accepted solution]

Port 25 (GigabitEthernet1/0/25) of VLAN0150 is designated forwarding
Port path cost 4, Port priority 128, Port Identifier 128.25.
Designated root has priority 32918, address 0056.2b74.2a80
Designated bridge has priority 32918, address 0056.2b74.2a80

Port 25 (GigabitEthernet1/0/25) of VLAN0250 is designated forwarding
Port path cost 4, Port priority 128, Port Identifier 128.25.
Designated root has priority 32768, address 0042.5a3a.daf1
Designated bridge has priority 33018, address 0056.2b74.2a80

the issue is Root SW is different for each VLAN and if you not play with VLAN STP priority then issue I think is 

incompatible STP protocol between SW, 
i.e. Cisco SW run PVST but the other vender run STP. 

so we need to check all info. of STP BPDU.