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Any limitation when configuring ip nat outside source static command?

Dear Support all,

 

I would like to configure Multiple Outside NAT on Cisco IOS router with the following condition,

Same Outside Global IP/Port, Same Outside Local IP but different Port number.

Here is the output for this however I think there is limitation, in my verification

Same Outside Global & Local IP but different Port numbers can be possible to configure below however according to
the following configuration guide I can not find the related information so I appreciate
if you can let me know any solution or related information.

#############################################################################################

R1(config)#ip nat outside source static udp 10.0.10.11 10000 192.168.1.11 20000 * OK

R1(config)#ip nat outside source static udp 10.0.10.11 10000 192.168.1.11 20001 * NG
% 10.0.10.11 already mapped (192.168.1.11 -> 10.0.10.11)

 

R1(config)#ip nat outside source static udp 10.0.10.11 10001 192.168.1.11 20000 * NG
% similar static entry (192.168.1.11 -> 10.0.10.11) already exists

R1(config)#ip nat outside source static udp 10.0.10.11 10001 192.168.1.11 20001 * OK

R1#sh ip nat translations
Pro Inside global Inside local Outside local Outside global
udp --- --- 192.168.1.11:20000 10.0.10.11:10000
udp --- --- 192.168.1.11:20001 10.0.10.11:10001

#############################################################################################

[Chapter: Configuring NAT for IP Address Conservation]
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_nat/configuration/15-mt/nat-15-mt-book/iadnat-addr-consv.html

 

Best Regards,

 

Masaonbu Hiyoshi

 

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