Hi,
Our customer is experiencing issues with users connecting to an 803.1x enabled SSID on their 5760 WLC. Scenario:-
User makes initial connection to SSID and authenticates. All works well.
User the disassociates from the SSID and then at a later time re-associates. At this point address obtained via DHCP looks fine, DHCP bindings can be seen in the snooping database but there is no connectivity. Investigation shows there is no arp entry in the client machine for the default gateway. Attempts to populate an arp entry are unsuccessful (wireshark shows arp requests going out but no replies returning). Configuring a static arp entry for the gateway on the client device does rectify the problem.
Interestingly in the period where there is no arp entry for the gateway we can attach an address to the approriate vlan interface on the WLC and this is reachable - ie we can ping x.x.x.5 but not the gateway at x.x.x.1.
Has anyone encountered anything similar?
Thanks
Al
