Sorry i realised the answer i gave before didn't quite fit what you were asking. The confusion comes from the fact that you are trying to do PAT but you are mapping 2 inside hosts to 2 natted addresses which isn't really PAT.
Do you want to do PAT or nat ie.
2 hosts on the inside and 2 addresses to NAT to could be done as follows
ip nat inside source static 172.21.171.1 192.168.21.1
ip nat inside source static 172.21.171.2 192.168.21.2
You original config should work - what are you seeing when you test it ?
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...