Got a SQL client based application, sends out an all network broadcast (SQL ANY udp 1498). Assuming no reply, the client will then unicast to the specific server. If an 'ICMP unreachable' is received the client will stop any further connection attempts.
We have the management interfaces of 2 cat5000 in the same vlan as the SQL client issuing the all network SQL ANY udp broadcast. These switches are responding to the broadcast as expected, but will not be listening to udp port 1498 and respond with and ICMP port unreachable, as expected and cause the client to stop any further SQL connection attempts.
Set ip unreachable disable on the catalysts what would you expect?