Hi all,
I have a very frustrating but also weird issue in my network.
When a mobile user roams between accesspoints which are connected to different switches the user cannot communicate anymore over the network.
Setup:
2x Accesspoints with roaming support
2x SG350-28P switches, named sw5 and sw7
Switches are interconnected using 2x 1Gbit optical fiber using portchannel
LACP enabled on the portchannel with short timeout
Both AP's share the same VLAN 8.
Static MAC addresses are not configured
Dynamic MAC address aging time is set to default of 300 sec
Issue reproduction:
1. Client is connected to AP1 attached to sw5. He can access all resources
2. Client moves onto the area of AP2 attached to sw7. He cannot access any resource on the network
3. After issuing a clear mac-address-table dynamic the client can immediate access network resources.
Additional testing found out that during the time that the client cannot access the network the broadcasts this client send are coming through (proven by received dhcp packets at the dhcp-server end). However the client does to get the final returned DHCPACK.
See attached the log of switch5.
Thanks for any ideas which can solve this issue. Clients are complaining a lot :-(
Jan-Pieter
