About Router NAT Configuration Consultation

[haininghuang3185]

I have a C1111 router and I configured the following static NAT.

ip nat inside source static 192.168.2.190 172.25.139.241

ip nat inside source static 192.168.2.191 172.25.139.242

ip nat inside source static network 192.168.2.0 192.168.61.0 /24

I would like to know whether the third static NAT configuration will conflict with the previous two static NAT configurations?

What I want to achieve is that 192.168.2.100 and 192.168.2.101 are NATed to 172.25.139.241 and 172.25.139.242 respectively, and the other addresses of 192.168.2.0/24 are NATed to 192.168.61.0/24

[MHM Cisco World]

There is no such this command 

ip nat inside source static network 192.168.2.0 192.168.61.0 /24

What try to do here?

MHM

[haininghuang3185]

There is such a command, which I can configure on the C1111 router. Now I need to add a command, which is ip nat inside source static network 192.168.2.0 192.168.61.0 /24, but I am not sure whether this command will affect my original two commands
ip nat inside source static 192.168.2.190 172.25.139.241
ip nat inside source static 192.168.2.191 172.25.139.242

[MHM Cisco World]

Friends there is 

One to one 

One to many (using pool)

But there is No 

Many to many 

MHM

[haininghuang3185]

Hello friend,

this command is also one-to-one NAT, which is to implement one-to-one NAT of the entire address segment, 192.168.2.0/24 NAT 192.168.61.0/24

You can look at this post

https://community.cisco.com/t5/routing/static-nat-for-a-complete-subnet/m-p/1297182#M122385

[MHM Cisco World]

First time I see such this command,

But you are correct

It one to one if both real and mapped IP use same prefix

And there is no conflict since the real and mapped IP not use in other NAT

MHM

[paul driver]

Hello

---

@MHM Cisco World 

But there is No 

Many to many
MHM

---

incorrect yes there is such a feature that can be used  like - ip nat inside source static network 192.168.2.0 192.168.61.0 /24

[MHM Cisco World]

Sorry but why the original post show 

192.168.2.0 and screenshot 192.168.100.0?

If it 192.168.100.0 this command not conflict 

If it 192.168.2.0 then there is conflicts 

MHM

[haininghuang3185]

I currently need to add a command to the original configuration
ip nat inside source static network 192.168.2.0 192.168.61.0 /24

[MHM Cisco World]

Are the ingress and egress of both NAT same?

İf not then there is no issue if same then there is conflict. 

MHM