Interface VLAN1 - Not available on 1941 ISR

[Ricky S]

Hey everyone, I am trying to configure the interface vlan1 on my router but it's not giving me that option. I have been able to do this before on similar routers. Any ideas?

router#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

router(config)#interface vlan 1

                          ^

% Invalid input detected at '^' marker.

!

!

router(config)#interface ?

  Async                    Async interface

  Auto-Template            Auto-Template interface

  BVI                      Bridge-Group Virtual Interface

  CDMA-Ix                  CDMA Ix interface

  CTunnel                  CTunnel interface

  Dialer                   Dialer interface

  Embedded-Service-Engine  cisco embedded service engine module

  GigabitEthernet          GigabitEthernet IEEE 802.3z

  Group-Async              Async Group interface

  LISP                     Locator/ID Separation Protocol Virtual Interface

  Lex                      Lex interface

  LongReachEthernet        Long-Reach Ethernet interface

  Loopback                 Loopback interface

  MFR                      Multilink Frame Relay bundle interface

  Multilink                Multilink-group interface

  Null                     Null interface

  Port-channel             Ethernet Channel of interfaces

  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

[Ricky S]

Here is a show ver of this router

router#sh ver

Cisco IOS Software, C1900 Software (C1900-UNIVERSALK9-M), Version 15.1(4)M4, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2012 by Cisco Systems, Inc.

Compiled Tue 20-Mar-12 17:58 by prod_rel_team

ROM: System Bootstrap, Version 15.0(1r)M12, RELEASE SOFTWARE (fc1)

router uptime is 5 minutes

System returned to ROM by power-on

System restarted at 19:18:21 UTC Tue Nov 19 2013

System image file is "flash:c1900-universalk9-mz.SPA.151-4.M4.bin"

Last reload type: Normal Reload

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to

export@cisco.com.

Cisco CISCO1941/K9 (revision 1.0) with 491520K/32768K bytes of memory.

Processor board ID FGL154420JW

2 Gigabit Ethernet interfaces

1 terminal line

1 Virtual Private Network (VPN) Module

DRAM configuration is 64 bits wide with parity disabled.

255K bytes of non-volatile configuration memory.

250880K bytes of ATA System CompactFlash 0 (Read/Write)

License Info:

License UDI:

-------------------------------------------------

Device#   PID                   SN

-------------------------------------------------

*0        CISCO1941/K9          xxxxxxxxx

Technology Package License Information for Module:'c1900'

-----------------------------------------------------------------

Technology    Technology-package           Technology-package

              Current       Type           Next reboot 

------------------------------------------------------------------

ipbase        ipbasek9      Permanent      ipbasek9

security      securityk9    Permanent      securityk9

data          None          None           None

Configuration register is 0x2102

[Richard Burts]

Interface vlan 1 works on switches. If this router had a switch module as part of it then you would be able to configure interface vlan 1. But this router has no switch module, at least according to the information about components in show version

2 Gigabit Ethernet interfaces

1 terminal line

1 Virtual Private Network (VPN) Module

So you can configure the Gig Ethernet interfaces but not interface vlan 1.

HTH

Rick

[Ricky S]

Hi Richard, thanks for the reply. Interestingly enough though, I have another 1941 router that has VLAN interface configured. There are actually quite a few of them.

Interface                  IP-Address      OK? Method Status                Protocol

Embedded-Service-Engine0/0 unassigned      YES NVRAM  administratively down down   

GigabitEthernet0/0         xxx.xx.xxx.xx   YES NVRAM  up                    up     

wlan-ap0                   172.18.7.1      YES unset  up                    up     

GigabitEthernet0/1         unassigned      YES NVRAM  up                    up     

GigabitEthernet0/1.1       unassigned      YES unset  up                    up     

Wlan-GigabitEthernet0/0    unassigned      YES unset  up                    up     

BVI1                       172.18.7.1      YES NVRAM  up                    up     

Cellular0/0/0              unassigned      YES unset  down                  down   

Cellular0/0/1              unassigned      YES unset  down                  down   

Dialer1                    unassigned      YES IPCP   up                    up     

Loopback0                  192.168.155.7   YES NVRAM  up                    up     

NVI0                       xxx.xx.xxx.xx   YES unset  up                    up     

Tunnel0                    10.10.200.7     YES NVRAM  up                    up     

Tunnel1                    10.10.201.7     YES NVRAM  up                    up     

Tunnel2                    10.10.202.7     YES NVRAM  up                    down   

Vlan1                      unassigned      YES unset  up                    up     

Vlan900                    10.11.7.1       YES NVRAM  up                    up    

Cisco IOS Software, C1900 Software (C1900-UNIVERSALK9-M), Version 15.1(4)M4, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2012 by Cisco Systems, Inc.
Compiled Tue 20-Mar-12 17:58 by prod_rel_team

ROM: System Bootstrap, Version 15.0(1r)M12, RELEASE SOFTWARE (fc1)

RTRSUD001 uptime is 30 weeks, 20 hours, 36 minutes
System returned to ROM by reload at 20:32:30 EST Mon Apr 22 2013
System restarted at 20:34:47 EST Mon Apr 22 2013
System image file is "flash:c1900-universalk9-mz.SPA.151-4.M4.bin"
Last reload type: Normal Reload
Last reload reason: Reload Command

This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
export@cisco.com.

Cisco CISCO1941W-A/K9 (revision 1.0) with 483328K/40960K bytes of memory.
Processor board ID FTX155180P2
3 Gigabit Ethernet interfaces
4 terminal lines
1 Virtual Private Network (VPN) Module
2 Cellular interfaces
1 cisco Embedded AP (s)
DRAM configuration is 64 bits wide with parity disabled.
255K bytes of non-volatile configuration memory.
250880K bytes of ATA System CompactFlash 0 (Read/Write)

License Info:

License UDI:

-------------------------------------------------
Device#   PID                   SN
-------------------------------------------------
*0        CISCO1941W-A/K9      xxxxxxxxx

Technology Package License Information for Module:'c1900'

-----------------------------------------------------------------
Technology    Technology-package           Technology-package
              Current       Type           Next reboot 
------------------------------------------------------------------
ipbase        ipbasek9      Permanent      ipbasek9
security      securityk9    Permanent      securityk9
data          None          None           None

[Ricky S]

RTRSUD001#sh run int vlan 900
Building configuration...

Current configuration : 206 bytes
!
interface Vlan900
ip address 10.11.7.1 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat inside
ip virtual-reassembly in
ip tcp adjust-mss 1380
no snmp trap link-status
end

[Richard Burts · Accepted solution]

There is an important difference between your 1941 routers. The first one is a regular 1941 which you can see in the output of show version

Cisco CISCO1941/K9 (revision 1.0) with 491520K/32768K bytes of memory.

And the second one is a 1941W which you can see in the output of show version

Cisco CISCO1941W-A/K9 (revision 1.0) with 483328K/40960K bytes of memory.

And one of the results of this difference is that the second 1941 has some components that the first one does not have

3 Gigabit Ethernet interfaces
4 terminal lines
1 Virtual Private Network (VPN) Module
2 Cellular interfaces
1 cisco Embedded AP (s)

The embedded AP in the 1941W is what gives you the ability to configure interface vlan 1 on this router. Since the first 1941 does not have this other component then you are not able to configure interface vlan 1 on the first 1941.

HTH

Rick

[Ricky S]

Great! Thanks for clearing that up Richard. Much appreciated!

Best regards,

Ricky

[Richard Burts]

Ricky

It has been an interesting discussion. I am glad that my explanation has been helpful to you. Thank you for using the rating system to mark this question as answered.

HTH

Rick