Hello
I have a cisco router 1721 with one subnet out side to internet, routed to my internal lan
ex:
Internal lan: 192.168.1.0/255.255.255.0
External Lan: 172.16.139.80/24

I have to add a new subnet with 16 IP's : ex(" 172.16.139.48/24")

So any ideas what configuration i should add to my router
Remark: my network is work fine

Thanks for your help

your post doesn't make sense for a few reasons.

1) the internet ip range is rfc 1918
2) add the new subnet to an existing interface or seperate one?
3) "with 16 IPs" and then you provide an IP in your current external subnet with a /24 subnet mask

i think you're going to need to elaborate and provide your config.

regards,
steve

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