L2TPv3 Tunnel Not Connecting

Unanswered Question
Aug 26th, 2010

I am trying to extend Vlan 8 from siteA to siteB, but the tunnel is not coming up. I have attached both sites running configs, so if anyone can shed light on this, I'd appreciate it.

concourse-2801#sh l2tun tunnel

%No active L2TP tunnels

concourse-2801#sh l2tun session

L2TP Session Information Total tunnels 0 sessions 1

LocID      RemID      TunID      Username, Intf/      State  Last Chg Uniq ID
                                 Vcid, Circuit
1          1          n/a        1, Fa0/1.8:8         est    18w0d    1
concourse-2801#


usaf-kc-nlan-rtr#sh l2tun session

L2TP Session Information Total tunnels 0 sessions 1

LocID      RemID      TunID      Username, Intf/      State  Last Chg Uniq ID

                                 Vcid, Circuit

1          1          n/a        1, Fa0/1.8:8         est    1w0d     4

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Peter Paluch Thu, 08/26/2010 - 14:19

Jason,

Do you have any particular need to set up the L2TP protocol session values manually, instead of letting the L2TP handle the session establishement in its competence? I believe that letting the L2TP handle the session and tunnel establishement would solve your issue, as this is a basic L2TP pseudowire.

Best regards,

Peter

perptech1 Thu, 08/26/2010 - 14:50

peter,

thanks for the information. we have no particular need for manually setting them up.

jason

Peter Paluch Thu, 08/26/2010 - 15:02

Hi Jason,

In such case, I suggest correcting your configuration as follows:

pseudowire-class l2tp-auto

encapsulation l2tpv3

protocol l2tpv3

ip local interface Loopback1

! For the first router:

interface FastEthernet0/1.8

xconnect 4.4.4.4 1 pw-class l2tp-auto

! For the second router:

interface FastEthernet0/1.8

xconnect 2.2.2.2 1 pw-class l2tp-auto

This should do the trick.

Best regards,

Peter

perptech1 Thu, 08/26/2010 - 14:51

peter,

thanks for the information. we have no particular need for manually setting them up.

jason

mpugina63 Wed, 03/21/2012 - 09:16

I have the following routers

Router 1

Interface                  IP-Address      OK? Method Status                Protocol

FastEthernet0/0            192.168.192.20  YES NVRAM  up                    up     

FastEthernet0/1            63.232.181.14   YES NVRAM  up                    up     

FastEthernet0/3/0          10.1.1.3        YES NVRAM  up                    up     

NVI0                       192.168.192.20  YES unset  up                    up     

Multilink88                65.102.24.102   YES NVRAM  administratively down down  

Router 2

Interface                  IP-Address      OK? Method Status                Protocol

GigabitEthernet0/0         10.4.52.10      YES NVRAM  up                    up     

GigabitEthernet0/1         172.31.150.2    YES NVRAM  administratively down down   

Serial0/0/0:0              unassigned      YES NVRAM  up                    up     

Serial0/0/1:0              unassigned      YES NVRAM  up                    up     

Serial0/1/0                unassigned      YES NVRAM  up                    up     

Multilink1                 65.102.24.134   YES NVRAM  up                    up    

I understand that I need to create a pseudowire-class l2tp-auto entry, but would I do it on my g0/0 interface since that is the vlan I want to extend from router 2? And would I create a simular entry on router 1 FastEthernet0/3/0 since that is the vlan I want it to reach?  I appreciate all help.

Thanks

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