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Occasional Contributor I
Posts: 6
Registered: ‎04-03-2014

C4K_EBM-4-HOSTFLAPPING

Following are   log  error:
 
 %C4K_EBM-4-HOSTFLAPPING: Host 7C:11:BE:19:45:32 in vlan 390 is flapping between port Gi4/21 and port Gi4/3
 
This is Cisco4506 log,but  The Vlan 390 is Aruba Wifi User vlan , G4/21 and G4/3 connect Aruba-Master and Aruba-Local,
 
I tested my wireless is  normal. Mater and Local is Ok. I don't  know how to explain this  log.
 
 
Guru Elite
Posts: 8,456
Registered: ‎09-08-2010

Re: C4K_EBM-4-HOSTFLAPPING

Are the same VLANs tagged on both of those links? Are they joined in a
port-channel?

Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Occasional Contributor I
Posts: 6
Registered: ‎04-03-2014

Re: C4K_EBM-4-HOSTFLAPPING

interface GigabitEthernet4/3
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 80,390,391
 switchport mode trunk

 

interface GigabitEthernet4/21
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 80,390,391
 switchport mode trunk

 

Today, I found  a similar  log,but this is rarely
MVP
Posts: 1,413
Registered: ‎11-30-2011

Re: C4K_EBM-4-HOSTFLAPPING

can you figure out what that MAC belongs to? a client / an AP / mobility controller?

 

how are your APs spread out of the master / local?

 

could be the client just moves from one master to local via the AP and then this can happen.

Occasional Contributor I
Posts: 6
Registered: ‎04-03-2014

Re: C4K_EBM-4-HOSTFLAPPING

The Mac is client. I don't agree with the result of  client  roaming。Thanks

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