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Community Member

IP addressing for Dial up clients.

I tried to set up default IP addressing for my dial up users on a 3640 router. I used a pool of three IP addresses for three lines. Things were fine till the first three users connected. A strange thing was happening after that . Users who dialed in were not getting IP addresses from the router. This happened even when all lines were free.

On debugging PPP negotiation, I got the following error -

Se3/0 IPCP: CompressType VJ 15 slots CompressSlotID (0x0206002D0F01)

Se3/0 IPCP: Address (0x030600000000)

Se3/0 IPCP: PrimaryDNS (0x810600000000)

Se3/0 IPCP: PrimaryWINS (0x820600000000)

Se3/0 IPCP: SecondaryDNS (0x830600000000)

Se3/0 IPCP: SecondaryWINS (0x840600000000)

Se3/0 IPCP: Using pool 'default'

Se3/0 IPCP: Cannot satisfy pool request

Se3/0 IPCP: Neither side knows remote address

On checking the IP pool when only one line was active, I got the message that all three IP addresses were in use. I tried using a block of 30 addresses for the pool, and things are working fine.

I had assumed that I need only three IP addresses in a pool to serve three lines. But things are not working out that way.

Any ideas ?


Re: IP addressing for Dial up clients.

Often times complex troubleshooting issues are best addressed in an interactive session with one of our trained technical assistance engineers. While other forum users may be able to help, it’s often difficult to do so for this type of issue.

To utilize the resources at our Technical Assistance Center, please visit and to open a case with one of our TAC engineers, visit

If anyone else in the forum has some advice, please reply to this thread.

Thank you for posting.

Community Member

Re: IP addressing for Dial up clients.

I do not have a CCO login to open a TAC case. Could you please try to resolve this issue for me ?


Community Member

Re: IP addressing for Dial up clients.


Can you post your config?

Remote access is not my specialty, but I can try...



Cisco Employee

Re: IP addressing for Dial up clients.

Somehow router still thinks that the connection on those three lines are still active and ip addresses are still in use. Type "sh users" and see is the router still see the users connected. Also "sh ip route" may report route will be there..Also post the config too.Thx..Tejal

Community Member

Re: IP addressing for Dial up clients.

Hello Tejal,

The relevant portions of the sh run command are pasted below for reference.

interface Group-Async1

physical-layer async

ip unnumbered Ethernet0/1

encapsulation ppp

ip tcp header-compression passive

no ip mroute-cache

keepalive 10

async default routing

async mode dedicated

peer default ip address pool default

ppp authentication chap pap

group-range 97 100

ip local pool default

line 97 100

session-timeout 5

absolute-timeout 30

login local

modem Dialin

transport preferred none

transport input all

stopbits 1

speed 115200

flowcontrol hardware

router# #sh ip local pool

Pool Begin End Free In use

default 26 4

As already mentioned, I have only three lines connected to my router. Any help will be appreciated very much. Thanks :-)

Community Member

Re: IP addressing for Dial up clients.

Pls. parse the config of pool and dial portion, you sure router is sending one of those IP addresses out of the pool? IPCP should not be

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