Cisco 2821 doesn´t accept virtual-ppp1

[nelson.mendes]

Hello,

I have a cisco router 2821 with IOS c2800nm-ipvoice_ivs-mz.124-24.T3.bin.

The question is that I´m trying to configure a L2TP tunnel but the router don´t accept that I configure the interface Virtual-PPP1:

«

(config)#interface ?
  Async              Async interface
  Auto-Template      Auto-Template interface
  BRI                ISDN Basic Rate Interface
  BVI                Bridge-Group Virtual Interface
  CDMA-Ix            CDMA Ix interface
  CTunnel            CTunnel interface
  Cellular           Cellular WAN interface
  Dialer             Dialer interface
  GigabitEthernet    GigabitEthernet IEEE 802.3z
  Group-Async        Async Group interface
  Lex                Lex interface
  Loopback           Loopback interface
  MFR                Multilink Frame Relay bundle interface
  Multilink          Multilink-group interface
  Null               Null interface
  Port-channel       Ethernet Channel of interfaces
  SSLVPN-VIF         SSLVPN Virtual Interface
  Serial             Serial
  Tunnel             Tunnel interface
  Vif                PGM Multicast Host interface
  Virtual-PPP        Virtual PPP interface
  Virtual-Template   Virtual Template interface
  Virtual-TokenRing  Virtual TokenRing
  range              interface range command
  vmi                Virtual Multipoint Interface

(config)#interface vitual-PPP1
                                  ^
% Invalid input detected at '^' marker.

»

The pseudoeire is not even recognized:

«

(config)#pse?
% Unrecognized command

»

I already configure:

«

vpdn enable

ip cef

l2tp-class L2TP
authentication

»

In cisco site this IOS support L2TP. The router accept the command show l2tp

Best Regards,

Nelson Mendes

[manasjai]

Hi,

Following is the configuration guide to configure L2TP on a cisco router

http://www.cisco.com/en/US/tech/tk801/tk703/technologies_configuration_example09186a00800946f5.shtml

Regarding (config)#interface vitual-PPP1
                                  ^
% Invalid input detected at '^' marker.

»

There is a typo at virtual .

It should be like interface virtual-ppp 1

Hope this helps!!

Thanks,

Manasi

[nelson.mendes]

Sorry,

this is the correct copy/paste:

«

(config)#interface virtual-PPP 1
                                        ^
% Invalid input detected at '^' marker.

»

[manasjai]

what code are you running on the router?

Can you paste the output of sh ver ?

http://www.cisco.com/en/US/docs/ios/dial/command/reference/dia_i1.html#wp1011879

The command was introduced in 12.3(2) T

Thanks,

Manasi

[wzhang]

Hi, Nelson:

The interface virtual-ppp and pseudoeire configuration requires the l2tpv3 pseudoeire-class feature, which is only available in the -entservicesk9-, -spservicesk9-, -advipservicesk9-, or -adventerprisek9- IOS feature sets. That's why you can't configure this in the -ipvoice_ivs- feature set as you have. You may want to upgrade the feature set and see if that helps.

Thanks,

Wen

[nelson.mendes]

This particular router is also a IP2IP gateway.

My afraid is that when I change the IOS some actual configuration is not recognized and the customer get the voip down (very critical).

The show version of the router is:

«

Cisco IOS Software, 2800 Software (C2800NM-IPVOICE_IVS-M), Version 12.4(24)T3, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Tue 23-Mar-10 06:43 by prod_rel_team

ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)

CSTorresDistr uptime is 14 weeks, 6 days, 13 hours, 52 minutes
System returned to ROM by Reload Command at 02:00:00 PORT Fri Sep 24 2010
System restarted at 02:01:26 PORT Fri Sep 24 2010
System image file is "flash:c2800nm-ipvoice_ivs-mz.124-24.T3.bin"

Cisco 2821 (revision 53.51) with 249856K/12288K bytes of memory.
Processor board ID FCZ1204727W
2 Gigabit Ethernet interfaces
1 Serial(sync/async) interface
2 ISDN Basic Rate interfaces
1 terminal line
2 Voice FXS interfaces
1 Cellular interface
DRAM configuration is 64 bits wide with parity enabled.
239K bytes of non-volatile configuration memory.
251904K bytes of ATA CompactFlash (Read/Write)

Configuration register is 0x2102

»

What IOS do you recommend ?

The idea is that this router work as a IP2IP and also have a 3G backup connection (that´s why I need to configure the tunnel).

Best regards

[wzhang · Accepted solution]

Hi,

I would recommend c2800nm-adventerprisek9_ivs-mz.124-24.T3. It's a superset of the -ipvoice_ivs- feature set that you have now, so you should not lose any IOS functionalities, see:

http://www.cisco.com/en/US/partner/prod/collateral/routers/ps5854/prod_bulletin0900aecd802a9493.html

Thanks,

Wen

[nelson.mendes]

Thanks Wen,

you absolutly right.

I change the IOS and it woks just fine.

Best regards,

Nelson Mendes