02-28-2007 02:11 PM - edited 03-05-2019 02:38 PM
Hi,
Can I configure PATing using the keyword "overload" on more than one router interface; when trying to configure more than one NAT rule using the keyword "overload" it gives an error that dynamics NATing is already in use.
Regards,
Haitham
02-28-2007 11:13 PM
Hi Haitham,
Yes you can use it on more than one interface.
'dynamics NATing is already in use' is unsually given when you are trying to change a rule from which the ip address is already in use.
Were you trying to give a different interface for the same access list?
Normally for one access-list you can use only a single interface.
Let me know if you were trying something different.
Thanks,
Radhika
02-28-2007 11:45 PM
Hi Radhika,
What I meant will be clearer when I give this senario and then let me know if what you mentioned in your post is applicable here or not:
interface FastEthernet0/0
ip address *.*.*.*
ip nat outside
duplex auto
speed auto
interface FastEthernet0/1
ip address *.*.*.*
ip nat outside
duplex auto
speed auto
interface FastEthernet0/2
ip address *.*.*.*
ip nat inside
duplex auto
speed auto
access-list 1 permit any
ip nat inside source list 1 interface FastEthernet0/0 overload
Now, when I try to enter the command:
ip nat inside source list 1 interface FastEthernet0/1 overload
I receive an error reading that dynamic NAT is already in use. I need to have dynamic NAT enabled on both fa0/0 and 0/1 because I am load balancing between the 2 link. Can you please clarify your point in your previous post based on my scenario?
Thanks,
Haitham
03-01-2007 05:22 AM
http://www.cisco.com/warp/public/556/12.html
I don't think you can have 2 separate instances of NAT overload, but you can define the pool to include more then one interface. (see the example in the above document)
I think you may be trying to accomplish this:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t15/ft_glbp.htm
03-01-2007 06:04 AM
Hi Haitham,
I can think of the following solution.
Try creating two extended access-lists,
Access-list one includes networks from f0/2 to f0/0 and access-list two includes networks from f0/2 to f0/1
now you can create two dynamic rules,
ip nat inside source list one interface f0/0 overload
ip nat inside source list two interface f0/1 overload
Now when the traffic goes through f0/0 its ip address will be used and when the traffic goes from f0/1 its ip address will be used.
Hope this helps,
Radhika
03-01-2007 06:57 AM
I agree with Radhika on this. You can also achieve the same using the route maps along with NAT config.
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080093fca.shtml
HTH,
-amit singh
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