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Issue with ASA

We have upgraded a pair of ASA 5540 with Version 8.0(2)? recently.

The problem we are facing is as below:

1. NAT Exemptions {nat (INSIDE) 0 access-list no_nat_in } does not get communicated to the failover pair.

2. Also if reloaded the nat exemption (nat 0) command gets deleted automatically and have to be then manually configured again.

3. Also if there are access-lists for the nat exemption are already configured and we try to configure the ?nat 0? it fails with a error message ?ERROR: access-list has protocol or port? the remedy of which is to remove all the no_nat access-lists, then configure single line, then configure the nat 0 statement and lastly put the remaining access-list lines.

Is this a bug issue?

Thanks in adv.