5900AF IRF stack Link-Aggregation issue with vSphere standard switch

[ohauer]

Having a 5900AF stack with Link aggregation over both switches, but sometimes dedicated IP's are not able to communicate over the vlan interface.
The issue started the time the stack was reconfigured to not use the old (cisco) stack as default router, I suspect the culprit is the "link-aggregation load-sharing mode".
On the old (cisco) stack I had to configure global "port-channel load-balance src-dst-ip" to prevent the behavior that I see now on the 5900, but adding "destination-ip source-ip" to the br interface (in shut mode) doesn't do the trick.


ESX vSwitch (Standard) configuration
# esxcli network vswitch standard policy failover get -v vSwitch0
   Load Balancing: iphash
   Network Failure Detection: link
   Notify Switches: true
   Failback: true
   Active Adapters: vmnic0, vmnic1, vmnic4, vmnic5
   Standby Adapters:
   Unused Adapters:

# display current-configuration interface Bridge-Aggregation
interface Bridge-Aggregation6
 port link-type trunk
 undo port trunk permit vlan 1
 port trunk permit vlan 1600 to 1620
 link-aggregation load-sharing mode destination-ip source-ip

# one/four interfaces
interface GigabitEthernet1/0/11
 port link-mode bridge
 port link-type trunk
 undo port trunk permit vlan 1
 port trunk permit vlan 1600 to 1620
 lldp compliance admin-status cdp txrx
 port link-aggregation group 6
 

# display link-aggregation verbose
Loadsharing Type: Shar -- Loadsharing, NonS -- Non-Loadsharing
Port Status: S -- Selected, U -- Unselected,
             I -- Individual, * -- Management port
Flags:  A -- LACP_Activity, B -- LACP_Timeout, C -- Aggregation,
        D -- Synchronization, E -- Collecting, F -- Distributing,
        G -- Defaulted, H -- Expired


Aggregate Interface: Bridge-Aggregation6
Aggregation Mode: Static
Loadsharing Type: Shar
Management VLAN : None
  Port             Status  Priority Oper-Key
--------------------------------------------------------------------------------
  GE1/0/11         S       32768    1
  GE1/0/12         S       32768    1
  GE2/0/11         S       32768    1
  GE2/0/12         S       32768    1

[Vince-Whirlwind]

We found the ESX default load-sharing mode would intermittently fail for one or more VLANs.

Changing load-sharing mode to anything else worked all the time no problem.