Question : Problem: Cisco 2600 series multiple IP address configuration

I have 32 IP addresses in 2 blocks from my ISP. The first block is 205.xxx.xxx.50 - 205.xxx.xxx.64 and the other is 66.xxx.xxx.34 - 66.xxx.xxx.49. On my router configuration I have many of these IPs routed to various IP addresses on my network for purposes of web, mail and remote desktop connections.

Every time I reboot my router, I have to go in and re-configure at least one route for each IP address other than my defaults otherwise the router does not respond on behalf of that IP address anymore (this seems to bind the address to the NIC again, temporarily).

In my interface configuration, I only have the first IP from both blocks configured. If I were to add the rest of the IP's as secondary addresses under the interface, would that fix my problem? At this point I'm afraid to reboot the router because I don't want to forget to fix every extra IP. Thanks.

Answer : Problem: Cisco 2600 series multiple IP address configuration

Changing the mask to 255.255.254.0 like you have gives you 510 usable addresses. 192.168.0.1 - 192.168.1.254.  You do not need the secondary addresses on Ethernet1/0.  Just make sure you change the subnet mask on all hosts to 255.255.254.0 as well.