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

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

Dialup users getting fixed IP addresses from a router

Is it possible to configure a router with local user database and provide static addresses to remote dialup clients based on username in the local database. This is a standalone 2800 solution with primary rate ISDN and Digital onboard modem module.

I know this is possible using external Radius / Tacacs

Thanks & regards,

Mark

9 REPLIES
Hall of Fame Super Gold

Re: Dialup users getting fixed IP addresses from a router

You can have them authenticate in tty mode and then start autocommand ppp for each different user as optionfor username command, for each specifying the ip address to use.

Hope this helps, please rate post if it does!

New Member

Re: Dialup users getting fixed IP addresses from a router

Hi,

Thanks for your feedback. Does this mean the client would have to bring up their terminal window as part of their windows setup to authenticate first. Not sure if the client will go for this one..

Thanks,

Mark

Hall of Fame Super Gold

Re: Dialup users getting fixed IP addresses from a router

Yes. Then I don't know of a way of doing it w/o radius or tacacs.

Cisco Employee

Re: Dialup users getting fixed IP addresses from a router

Here are two ways to configure a router locally with per-user

IP address assignment based upon authenticated peer name:

1. configure a separate dialer profile for each user. E.g.

interface dialer 5

dialer pool 1

dialer remote-name JONES

peer default ip address 10.1.2.3

configure your group-async as "dialer in-band" and "dialer pool-member 5".

2. configure your async interfaces for legacy dialer, and user dialer maps

interface group-async1

dialer in-band

dialer map ip 10.1.2.3 name JONES

P.S. Hi Paolo - it's been awhile, hope you're doing well!

Cisco Employee

Re: Dialup users getting fixed IP addresses from a router

Given that you have both ISDN and modem users,

if you use method 2, do it this way:

interface serial0:23

dialer rotary 1

interface serial 1:23

dialer rotary 1

interface group-async 1

dialer rotary 1

interface dialer 1

dialer map ip 10.1.2.3 name JONES

New Member

Re: Dialup users getting fixed IP addresses from a router

Thanks guys.... I have another question about allocating an IP address on the same range as the LAN side.

e.g. LAN address of the router 10.0.0.1 255.255.0.0 the client must have e.g. 10.0.0.10 /32 etc.

Has anyone done this before ?

Thanks,

Cisco Employee

Re: Dialup users getting fixed IP addresses from a router

Sure, just unnumber the dialer interface(s) to

the LAN interface. E.g.

interface dialer 1

ip unnumbered fastethernet0

It will then work fine for the dialer's peers to

get addresses from the LAN subnet. When PPP IPCP is

negotiated, a /32 route to the peer will automatically

be installed in the router's routing table.

New Member

Re: Dialup users getting fixed IP addresses from a router

Thanks Aaron,

Wilk chck this out at the weekend...

Best regards,

Mark

Hall of Fame Super Gold

Re: Dialup users getting fixed IP addresses from a router

Great suggestions Aaron.

All is well. we still here making things work.

best of luck!

241
Views
14
Helpful
9
Replies