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VPN L2TP problem

Hello colleagues.

I'm trying to implement VPN thought L2TP tunnel in the following network:

PC --- ethernet -- C806 --- ethernet ---- INTERNET --- ethernet -- C2621 -- ethernet --- PC

Configs:

C806:

hostname VPN-Client

!

vpdn enable

!

vpdn-group 1

! Default L2TP VPDN group

request-dialout

protocol l2tp

pool-member 1

initiate-to ip 10.0.0.111

local name vclient

no l2tp tunnel authentication

!

interface Dialer1

mtu 1492

ip address negotiated

encapsulation ppp

dialer pool 1

dialer remote-name vserver

dialer idle-timeout 0

dialer persistent

dialer vpdn

dialer-group 1

!

ip classless

ip route 0.0.0.0 0.0.0.0 Dialer1

C2621:

hostname VPN-Server

!

vpdn enable

!

vpdn-group 1

! Default L2TP VPDN group

accept-dialin

protocol l2tp

virtual-template 1

local name vserver

no l2tp tunnel authentication

!

interface Virtual-Template1

mtu 1492

ip unnumbered FastEthernet0/1

peer default ip address pool vpn1

!

ip local pool vpn1 62.213.83.40 62.213.83.43

L2TP tunnel is up, but have no sessions.

VPN-Client#sh vpdn tunnel

L2TP Tunnel Information Total tunnels 1 sessions 0

LocID RemID Remote Name State Remote Address Port Sessions VPDN Group

35182 45722 vserver nosess 10.0.0.111 1701 0 1

VPN-Server#debug vpdn l2x-events

*Mar 2 17:27:35.613: Tnl 62389 L2TP: I OCRQ from vclient tnl 18991

*Mar 2 17:27:35.613: Tnl 62389 L2TP: Tunnel state change from no-sessions-left to established

*Mar 2 17:27:35.613: Tnl/Sn 62389/14044 L2TP: Session FS enabled

*Mar 2 17:27:35.613: Tnl/Sn 62389/14044 L2TP: New session created

*Mar 2 17:27:35.613: Tnl 62389 L2TP: O CDN to vclient tnlid 18991

*Mar 2 17:27:35.617: Tnl 62389 L2TP: Control channel retransmit delay set to 1 seconds

*Mar 2 17:27:35.617: Tnl/Sn 62389/14044 L2TP: disconnect (L2X) IETF: 9/nas-error Ascend: 62/VPDN No Resources

*Mar 2 17:27:35.617: Tnl/Sn 62389/14044 L2TP: Destroying session

*Mar 2 17:27:35.617: Tnl 62389 L2TP: Tunnel state change from established to no-sessions-left

What resourses VPDN is required?? Where I'm wrong in configs?

Thank you for advance.

1 REPLY
New Member

Re: VPN L2TP problem

Hi,

Not sure if this works....but try increasing the MTU on both sides.....

( And, is it possible to reload the routers once, many a times it works )

Nikh.

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