[c-nsp] Duplicate virtual interface on LNS or no Vi established

[Richard Grimwood]

Hi I am new to list and of course I need help. Sorry.

Using a cisco 7201 as an LNS with

7201LNS-TH#show ver
Cisco IOS Software, 7200 Software (C7200P-IPBASE-M), Version 12.4(15)T12,
RELEASE SOFTWARE (fc3)

approx 600 broadband adsl users connected. But we are suffering from two
issues

1/  hung L2TP sessions, no Vi established
7201LNS-TH#sh l2tp sess | i 264349
986        51851      4376       264349_men at dslcon, - est    01:12:29 0
7201LNS-TH#sh users | i 264349

No response user doesn't exist

2/ duplicate Vi

7201LNS-TH#sh l2tp sess | i Vi86
85         40712      18840      jbtl_men at dslco, Vi86 est    11:09:06 86
933        40511      49962      helenswood_men, Vi86 est    00:00:07 949
7201LNS-TH#


7201LNS-TH#sh l2tp sess | i Vi235
251        17752      3279       CORMACKGRACIE, Vi235 est    15:18:30 251
943        11237      3279       S2868HOME at ads, Vi235 est    03:53:20 960
770        46476      51059      S3335GB at adsl1, Vi235 est    07:39:43 784
7201LNS-TH#sh users | i Vi235
 Vi235        S2868HOME at adsl1.co PPPoVPDN     00:00:01 195.206.198.13
7201LNS-TH#


Anybody else been through this and out other side?
raising a TAC with cisco of course but is it possible it is a config issue
rather than an IOS bug?  The wholesale ADSL provider has looked at config
and sees nothing wrong.
-- 
Best Regards
Richard Grimwood