Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Need help.Change CIDR mask.

In my company there is a Cisco 3600 router that has a FastEthernet address of My beloved boss gave me the task of changing the CIDR mask from /30 to /29 to create a block of 5 Public IP's. Me, who have no routing experience.

The other part of the task is to:

1 - Assign xxx.x.xx.50 as the Public IP to which all internal IP addresses will be NATed to

2 - Assign as the Public IP for remote management access.

Now, from picking up the CCNA books and notes and watever help i can get i can telnet into the router...get into the interface that has the /30 mask.

It is here that i am stuck and ask for assistance.please.

Joel _______________________________ Please rate helpful posts and answered questions!

Re: Need help.Change CIDR mask.

for the mask change just change it from to a mask of . This should be done to whatever is attached to the other of that link also .

New Member

Re: Need help.Change CIDR mask.

will do. thanks very much....i still have the IP's to for the NATing and the other for the remote device access....will ask again if i need assistance...thanks again

Joel _______________________________ Please rate helpful posts and answered questions!