[cisco-bba] Cisco as L2TP Access Concentrator (LAC)

[Oliver Boehmer (oboehmer)]

Tom,

I guess this is due to the IOS version deployed on the box. 12.2
mainline doesn't have the newer infrastructure as in 12.2SB/12.3/12.4.
As we don't start IPCP, IP address or pool information are ignored
anyway..

	oli


Tom Storey <mailto:tom at snnap.net> wrote on Wednesday, March 05, 2008
9:25 AM:

> Why does your LAC show the user as being connected via Virtual-
> interface 1?
> 
> Ideally a LAC would not show any terminated users, only forwarded
> sessions. In your case, it appears you have both.
> 
> In your virtual template, change "ip unnumbered Loopback1" to "no ip
> address" and add "no peer default ip address".
> 
> On 05/03/2008, at 1:55 AM, Rado Vasilev wrote:
> 
>> Hi Oliver,
>> 
>> Thanks for your help - I got it working now!!!
>> 
>> --- Minimal Cisco LAC configuration ---
>> 
>> aaa new-model
>> aaa authentication login default local
>> aaa authentication ppp default local
>> 
>> 
>> vpdn enable
>> vpdn multihop
>> !
>> vpdn-group 1
>> accept-dialin
>>  protocol pppoe
>>  virtual-template 1
>> !
>> 
>> vpdn-group 2
>> request-dialin
>>  protocol l2tp
>>  domain deckland.com
>> initiate-to ip 2.2.2.2
>> local name deckland.com
>> no l2tp tunnel authentication
>> source-ip 1.1.1.1
>> 
>> interface FastEthernet2/0.5
>> description PPPoE Test
>> encapsulation dot1Q 5
>> pppoe enable
>> pppoe max-sessions 100
>> 
>> 
>> interface Virtual-Template1
>> description PPPoE Test
>> ip unnumbered Loopback1
>> keepalive 30
>> ppp authentication chap
>> 
>> ----------------------------------------
>> 
>> lac#sh vpdn tunnel
>> 
>> L2TP Tunnel Information Total tunnels 1 sessions 1
>> 
>> LocID RemID Remote Name   State  Remote Address  Port  Sessions
>> 21754 33850 d-test-lns1    est    2.2.2.2     1701  1
>> 
>> lac#sh users
>>    Line       User       Host(s)              Idle       Location
>> *  2 vty 0     admin      idle                 00:00:00 3.3.3.3
>> 
>>  Interface      User        Mode                     Idle     Peer
>>  Address Vi1          rado at deckl Virtual PPP (PPPoE ) 00:00:00
>> 
>> Regards,
>> Rado
>> 
>> 
>> 
>> -----Original Message-----
>> From: Oliver Boehmer (oboehmer) [mailto:oboehmer at cisco.com]
>> Sent: 04 March 2008 14:04
>> To: Rado Vasilev; cisco-bba at puck.nether.net
>> Subject: RE: [cisco-bba] Cisco as L2TP Access Concentrator (LAC)
>> 
>> Rado Vasilev <mailto:rado at dev.magnet.ie> wrote on Tuesday, March 04,
>> 2008 2:47 PM: 
>> 
>>> Hi Oliver,
>>> 
>>> I added the global configuration command ``vpdn multihop'' but that
>>> didn't help. Did you mean to recommend some additional command(s)
>>> under the vpdn-group too?
>> 
>> Well, I meant to configure a pppoe vpdn-group (or bba-group,
>> depending on version) and a virtual-template just as you did
>> initially (you mentioned that you successfully terminated the pppoe
>> sessions on the 7200). This is required to accept pppoe sessions.
>> The "vpdn multihop" along with the addtl. vpdn-group will take care
>> of L2TP forwarding. So the 7200 will act as LNS as well as LAC
>> (sometimes referred to as "multihop LNS").. 
>> 
>> you might want to consider upgrading to 12.3M or 12.4M to get addtl.
>> functionality for this type of application..
>> 
>> 	oli
>> 
>> 
>> 
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>> 
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