This attribute is indicative of the number of instances wherein TB table
entry was unavailable. These entries could have been denied for static
entries or for dynamic entries. This counter wraps around its maximum
value of 4294967295.
If this counter consistently shows a high value, it is indicative of a
resource shortage in terms of memory required to support the increase in
the number of forwarding table entries. To rectify this resource shortage,
increase the number of forwarding table entries through the provisioned
attribute tbFwdTableEntries under the Bridge component. This counter
should ideally be as low as possible.