If yr 2621 have two ethernet ports u can allot the an ip from the new pool to the ethernet and route the packets to the respective devices in yr LAN.Just that yr ISP has to put a static route for the new set of ip's.
ip route 10.1.1.0 255.255.255.0 s1(Serial port)
If u don't have two ethernet ports u can put the new set of ip's as secondary in the same ethernet port and rest as in the previous case.
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 custome...