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about multi-NAT

hsasaki_cert
Level 2
Level 2

Dear Sirs,

Cisco828 was able to confirm the function.

Table 9 Feature List by Feature Set for the Cisco 828 Routers

Address Conservation

NAT Many to Many(multi-NAT) Yes

http://www.cisco.com/en/US/products/sw/iosswrel/ps5012/prod_release_note09186a0080081189.html

It is not possible to confirm it with other models.

Does not bbb operate excluding multi-NAT ?

What is equivalent to multi-NAT a function excluding Cisco828 ?

Best regards,

2 Replies 2

Georg Pauwen
VIP Alumni
VIP Alumni

Hello,

multi-NAT, or many-to-many, is simply using a pool of target IP addresses, and an access list containing the source IP addresses, as in this example:

ip nat pool POOL1 10.10.10.1 10.10.10.254 netmask 255.255.255.0

ip nat inside source list 1 pool POOL1

!

access-list 1 permit 192.168.1.0

This is supported on all routers. I am not sure if the terminology ´multi-NAT´ is used that often, but it is the most basic (and most common) way of implementing NAT.

HTH,

GP

spremkumar
Level 11
Level 11

Hi

Are you pointing something inline with usage of Route-maps to facilitate the translations ??

something like mentioned below ??

having different local address getting natted to different global pools ??

ip nat pool provider1-space 171.69.232.1 171.69.232.254 prefix-length 24

ip nat pool provider2-space 131.108.43.1 131.108.43.254 prefix-length 24

ip nat inside source route-map provider1-map pool provider1-space

ip nat inside source route-map provider2-map pool provider2-space

!

interface Serial0/0

ip nat outside

!

interface Serial0/1

ip nat outside

!

interface Fddi1/0

ip nat inside

!

route-map provider1-map permit 10

match ip address 1

match interface Serial0/0

!

route-map provider2-map permit 10

match ip address 2

match interface Serial0/1

regds