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Re: SV3200 MAC flapping

 
Visitor

SV3200 MAC flapping

Hello there,

Our SV3200 has 2 LACP bonds (4x 1Gbps each) with Cisco 3850 (2-stack).

The way we connected it is very similar to this (taken from SV3200 user guide).

Untitled.png

LACP seems to be estabilished properly, however, we're observing very random MAC Flaps few times a day:

*Sep 5 13:28:31.891: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po12 and port Po11 
*Sep 5 13:33:46.353: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po11 and port Po12
*Sep 5 13:33:46.447: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po11 and port Po12 
*Sep 5 13:39:01.887: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po12 and port Po11
*Sep 5 13:39:01.978: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po12 and port Po11 
*Sep 5 13:44:16.548: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po11 and port Po12
*Sep 5 13:44:16.648: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po11 and port Po12 
*Sep 5 13:49:31.986: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po12 and port Po11
*Sep 5 13:49:32.078: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po12 and port Po11 

 

Any ideas what could be causing this?

Or at least any clue how to troubleshoot this? This MAC address is strange and it doesn't belong to any device - 0060.0869.97ef

 

Thanks!

 

5 REPLIES 5
Frequent Visitor

Re: SV3200 MAC flapping

yes, i facing same problems.

2 ALB 1G port connect to Cisco 2960. i read many flapping msg on switch.

anyone have experience like this ?

 

thk

Occasional Visitor

Re: SV3200 MAC flapping

Same problem with Cisco 3750, no answer form HP.

Occasional Visitor

Re: SV3200 MAC flapping

Same problem with Cisco 2960, still can not find root cause, is anyone figure out?

Frequent Visitor

Re: SV3200 MAC flapping

anyone get the answer of this ?

cause i have same issue.

%SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 104 is flapping between port Gi1/0/1 and port Gi2/0/2

Re: SV3200 MAC flapping

Need to check if you are using VEEAM with SV3200 which is not allowed. Veeam is expecting the SLPT volume presentation model of the P4000 products and not the MLPT volume presentation model the SV3200 uses. Veeam does not list the SV3200 on their list of supported products. So request you to stop using VEEAM with SV3200

--> As per SV3200 best practice guide it says as below,

"If the network switches are set up as one big virtual switch (using features such as IRF trunking or Cisco vPC), the bonding on HPE StoreVirtual 3200 and servers connected to those switches must be set to LACP to avoid losing access to the storage in the event of a network component failure.

Hewlett Packard Enterprise recommends enabling Flow Control on all switch ports that are used for the iSCSI SAN to achieve optimal performance (including the LACP trunk ports of the inter-switch connection). There is no need to change any settings on the HPE StoreVirtual 3200 side—the network ports on the storage controllers automatically negotiate to match the flow control settings of the switch ports."

 

Hope this helps!
Regards
Subhajit

I am an HPE employee

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