Hi, I am currently trying to provide one of our clients a vlan over a PPP link as per their request of only a layer 2 connection. The connection would be like 3750g <--> 7200 <--> 1841 where the 7200 and 1841 is a ppp link. In doing some research, we found L2TPv3 to be a viable option. However, I am having trouble keeping the tunnel up and sending traffic over it.
At the moment I am trying to configure only a simple layer 2 tunnel on test devices: 2 1841 routers, Version 12.4(15)T12, Advanced Services. I am currently using these 2 sites as reference: http://prakashkalsaria.wordpress.com/2010/05/11/l2tpv3-over-hdlc-l2tpv3-over-ppp/, http://www.informit.com/library/content.aspx?b=Troubleshooting_VPNs&seqNum=44 On the other hand I was also recently informed that there may be too much overhead in a layer 2 tunnel. If that is the case, what is the more viable option for this setup? I have attached the debug output from the tunnels as well. Any assistance would be appreciated.
Router#show l2tun
L2TP Tunnel and Session Information Total tunnels 1 sessions 1
LocTunID RemTunID Remote Name State Remote Address Sessn L2TP Class/
Count VPDN Group
33146 0 wsccrp 10.1.1.1 1
l2tp_default_cl
LocID RemID TunID Username, Intf/ State Last Chg Uniq ID
Vcid, Circuit
2130 0 33146 101, Se0/0/0 wt-cc 00:00:04 1
Router#show l2tun
L2TP Tunnel and Session Information Total tunnels 1 sessions 0
LocTunID RemTunID Remote Name State Remote Address Sessn L2TP Class/
Count VPDN Group
33146 0 shutdn 10.1.1.1 0
l2tp_default_cl
Router#show l2tun
%No active L2TP tunnels
Router#
Router#debug l2tp l2tun
L2TP L2TUN socket API debugging is on
Router#
*Jul 8 14:36:38.495: L2X 00001:_____:________: APP->L2TP: Session reopen,
*Jul 8 14:36:38.495: L2X 00001:_____:________: sock 0xB5000001
*Jul 8 14:36:38.495: L2X 00001:_____:________: serv 0x00000000
*Jul 8 14:36:38.495: L2X 00001:_____:________: data 0x656A2C98[92]
*Jul 8 14:36:38.495: L2X 00001:_____:________:
*Jul 8 14:36:38.499: L2TP 00001:01005:0000B764: APP->L2TP: setup dataplane,
*Jul 8 14:36:38.499: L2TP 00001:01005:0000B764: sock 0xB5000001
*Jul 8 14:36:38.499: L2TP 00001:01005:0000B764: serv 0x00000000
*Jul 8 14:36:38.499: L2TP 00001:01005:0000B764: no serv hdl yet;
use socket
*Jul 8 14:36:38.499: L2TP 00001:01005:0000B764:
*Jul 8 14:36:45.495: L2TP 00001:01005:0000B764: APP<-L2TP: disconnect
*Jul 8 14:36:45.495: L2TP 00001:01005:0000B764: sock 0xB5000001
*Jul 8 14:36:45.495: L2TP 00001:01005:0000B764: serv 0x00001000
*Jul 8 14:36:45.495: L2TP 00001:01005:0000B764:
Router#debug xconnect event detail
Xconnect detailed events debugging is on
Router#
*Jul 8 14:40:38.015: XC L2TP: uid:1[10.1.1.2/101] Event <Connect Timer
Expired>, state Waiting for timer to connect -> Connecting
*Jul 8 14:40:38.015: XC L2TP: uid:1[10.1.1.2/101] L2TUN socket session connect
requested
*Jul 8 14:40:45.015: XC L2TP: Received L2TUN socket message <CDN - Session
Disconnected>
*Jul 8 14:40:45.015: XC L2TP: uid:1[10.1.1.2/101] Event <CDN - L2TUN Socket
Session Disconnected>, state Connecting -> Connecting
*Jul 8 14:40:45.015: XC L2TP: uid:1[10.1.1.2/101] Event <Start Connect Timer>,
state Connecting -> Waiting for timer to connect
*Jul 8 14:40:45.015: XC L2TP: uid:1[10.1.1.2/101] with 50% jitter
*Jul 8 14:41:11.443: XC L2TP: uid:1[10.1.1.2/101] Event <Connect Timer
Expired>, state Waiting for timer to connect -> Connecting
Router#show run
ip cef
!
!
pseudowire-class pswire
encapsulation l2tpv3
ip local interface Loopback0
!
!
interface Loopback0
ip address 10.1.1.1 255.255.255.255
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0/0
no ip address
encapsulation ppp
shutdown
no fair-queue
serial restart-delay 0
no cdp enable
no clns route-cache
xconnect 10.1.1.2 101 encapsulation l2tpv3 pw-class pswire
!
----------------------------------------------
Router#show run
ip cef
!
!
pseudowire-class pswire
encapsulation l2tpv3
ip local interface Loopback0
!
!
interface Loopback0
ip address 10.1.1.2 255.255.255.255
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0/0
no ip address
encapsulation ppp
shutdown
no fair-queue
serial restart-delay 0
no cdp enable
no clns route-cache
xconnect 10.1.1.1 101 encapsulation l2tpv3 pw-class pswire
_______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
