I have a problem on two 16 GIGA ethernet modules on 6500 swithch, the servers connected on these modules couldnt see each other and they on the same vlan, when i put the servers on the same module they see each other.
Also, be sure the port configuration is the same. That they are all switchports, duplex settings etc.
Have you tried pinging something else than other servers? like default gateway/IPs of other VLANs or some other destination?
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