Cisco Systems 2.5 Reasons that Cisco SDM Cannot Edit a NAT Rule

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Cisco Router and Security Device Manager 2.5 User’s Guide
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Chapter40 More About....
More About NAT
Scenario 2
You want the host addresses specified in access-list 7 in the previous scenario to
use addresses from a pool you define. If the addresses in the pool become
depleted, you want the router to use PAT to satisfy additional requests for
addresses from the pool.
The following table shows how the fields in the Address Pool window would be
used for this scenario.
The following table shows how the fields in the Add Address Translation Rule
window would be used for this scenario.
Result
Hosts IP addresses in the network 10.10.10.0 are translated to IP address in the
range 172.16.131.2 to 172.16.131.10. When there are more requests for address
translation than available addresses in Pool 1, the same address is used to satisfy
subsequent requests, and PAT is used to distinguish between the hosts using the
address.
Reasons that Cisco SDM Cannot Edit a NAT Rule
A previously configured NAT rule will be read-only and will not be configurable
when a NAT static rule is configured with any of the following:
•The inside source static and destination Cisco IOS commands
Pool Name
Port Address
Translation IP Address fields Network Mask
Pool 1 Checked 172.16.131.2 172.16.131.10 255.255.255.0
Static/Dynamic
Translate from...
fields Translate to... fields
ACL Rule Type Interface Address Pool
Dynamic 7 Address Pool Disabled Pool 1