Loss of traffic between vlans on the same NIC

Hi,

We have two R55 HFA14 servers in ClusterXL active/standby
mode. They
each have 3 NIC's (external, internal with 10 vlans, and
sync(crossover)).

In the last few months, one of the nodes will suddenly stop
passing
traffic between vlans on the same NIC. Traffic between NICs
works fine.
Has anyone else experienced this issue or is there a known
fix?

Thanks

Trevor.

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