Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

Cisco Business Edition 6000M Svr (M4), Export Restricted SW (BE6M-M4-K9=) Looping Issue

 

We have cutover to the Cisco Business Edition 6000M Svr (M4), Export Restricted SW (BE6M-M4-K9=) for UC. Two ports on this server are connected to our 2960S switch stack . The Server runs VmWare ESXi and the VMs related to UC – Communications manager, Unity Connection, IM & Presence, etc. We are using “IP Hash” for Load balancing and active/active failover for the server VM's.  We are receiving the below error message in our syslogs

43.230 EDT: %SW_MATM-4-MACFLAP_NOTIF: Host 000c.2909.7fec in vlan 10 is flapping between port Gi3/0/11 and port Gi1/0/39
536997: Jul 25 14:35:50.266 EDT: %SW_MATM-4-MACFLAP_NOTIF: Host 000c.29fd.1d77 in vlan 10 is flapping between port Gi3/0/11 and port Gi1/0/39
536998: Jul 25 14:35:59.195 EDT: %SW_MATM-4-MACFLAP_NOTIF: Host 000c.2909.7fec in vlan 10 is flapping between port Gi3/0/11 and port Gi1/0/39
536999: Jul 25 14:36:05.592 EDT: %SW_MATM-4-MACFLAP_NOTIF: Host 000c.29fd.1d77 in vlan 10 is flapping between port Gi3/0/11 and port Gi1/0/39

Can anyone tell me what would be the correct configuration for the switch ports and the ESXi for UCS? Our current port configurations are below.

interface GigabitEthernet1/0/39
description ESXI - UC Port 1
switchport mode trunk
spanning-tree portfast trunk
spanning-tree bpduguard enable
no ip igmp snooping tcn flood
end

NJ-MDF-2960-STACK#sh run int Gi3/0/11
Building configuration...

Current configuration : 183 bytes
!
interface GigabitEthernet3/0/11
description ESXI UC Port 2
switchport mode trunk
spanning-tree portfast trunk
spanning-tree bpduguard enable
no ip igmp snooping tcn flood

1 REPLY
VIP Gold

If you have load balancing

If you have load balancing configured on ESXi side, you need to have configured load balancing on 2960S as well. It seems you have no load balancing configured on Gi1/0/39 & Gi3/0/11.

Unfortunately, I have experience with neither ESXi load balancing nor stacked 2960S load balancing configurations. May be someone else will help. I can offer just some notices and documents that may help you:

  1. From 2960 documentation: "Port Aggregation Protocol (PAgP) can be enabled only in single-switch EtherChannel configurations; PAgP cannnot be enabled on cross-stack EtherChannels.". It sems you can use LACP in stacked environment only (e.g channel-protocol lacp & channel-group N mode ...)
  2. ESXi: Sample configuration of EtherChannel / Link Aggregation Control Protocol (LACP) with ESXi/ESX and Cisco
  3. ESXi:  Enabling or disabling LACP on an Uplink Port Group using the vSphere Web Client (2034277).

79
Views
0
Helpful
1
Replies