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Can I configure ethernet sub-interfaces on a 1921 or 2600?

Discussion in 'General Cisco Certifications' started by royce, Aug 21, 2010.

  1. royce

    royce New Member

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    Have just tried setting up a lab to test a possible office setup.
    I have been trying to configure a Cisco 2600 with subinterfaces to connect to switch.

    What I have is:
    C2600 Software (C2600-I-M), Version 12.3(26), RELEASE SOFTWARE (fc2)

    What I am trying to do is:

    Interface Ethernet 0/0.10
    ip address 192.168.1.1 255.255.255.0
    encapsulation dot1q

    Interface Ethernet 0/0.20
    192.168.2.1 255.255.255.0
    encapsulation dot1q

    etc....

    The Interface Ethernet 0/0 will be patched into a downstream Cisco 3960G with VLANs for each subinterface

    My issues that when i try to configure an IP address it tells me:

    % Configuring IP routing on a LAN subinterface is only allowed if that
    subinterface is already configured as part of an IEEE 802.10, IEEE 802.1Q,
    or ISL vLAN.


    I look at the list of allowed commands on the interface and trunk encapsulation is not actually listed.

    Do I need to buy an IPServices license for this to work?

    I am actually planning on setting up a small office with a similar setup using a Cisco 1921 Integrated Services router. Will this work with 1921 IP Base?
     
  2. bazzawood30

    bazzawood30 Byte Poster

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    Did you put this in before the config you listed

    Interface Ethernet 0/0
    no shut

    then the bit you listed
     
    Certifications: ECDL,A+,N+,CCENT,CCNA,MCP,MCDST
  3. bazzawood30

    bazzawood30 Byte Poster

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    Oh sorry you should also set the dot1Q before the ip address on the sub interface.
     
    Certifications: ECDL,A+,N+,CCENT,CCNA,MCP,MCDST
  4. bazzawood30

    bazzawood30 Byte Poster

    176
    4
    17
    Certifications: ECDL,A+,N+,CCENT,CCNA,MCP,MCDST
  5. bazzawood30

    bazzawood30 Byte Poster

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    try this

    Interface Ethernet 0/0
    no shut

    Interface Ethernet 0/0.10
    encapsulation dot1q 10
    ip address 192.168.1.1 255.255.255.0

    Interface Ethernet 0/0.20
    encapsulation dot1q 20
    192.168.2.1 255.255.255.0
     
    Certifications: ECDL,A+,N+,CCENT,CCNA,MCP,MCDST
  6. royce

    royce New Member

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    Hey, thanks for the reply. Yes I enabled Ethernet 0/0 before I tried to configure anything on the subinterfaces.
    When I "?" for a list of commands, there is no "encapsultation" option there, nor is there any other command for anything similar.
    I just logged onto a cisco 2811 and tried the same thing and had no issues. If i do a show ver this is what I have:
    Cisco IOS Software, 2801 Software (C2801-SPSERVICESK9-M), Version 12.4(24)T3, RELEASE SOFTWARE (fc2)

    On the 2600 if i do a show ver i get this:
    C2600 Software (C2600-I-M), Version 12.3(26), RELEASE SOFTWARE (fc2)
     
  7. bazzawood30

    bazzawood30 Byte Poster

    176
    4
    17
    Certifications: ECDL,A+,N+,CCENT,CCNA,MCP,MCDST
  8. royce

    royce New Member

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    Hey,
    Thanks for the tip. I just found out that you cannot run 802.1Q without at least IP Plus...
    I have already ordered a couple of 1921's with IP Base...
    does this just mean that I need to purchase the license upgrade keys from Cisco?
     
  9. bazzawood30

    bazzawood30 Byte Poster

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    According to the cisco feature navigator a 1921 with ios universal ip base will support ieee 802.1q vlan support & trunking.
     
    Certifications: ECDL,A+,N+,CCENT,CCNA,MCP,MCDST
  10. royce

    royce New Member

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    Excellent!
    Im not sure how I missed that when i looked at the feature navigator. I just jumped in again now and found it.
    Thanks very much for your help.
     
  11. Dubfire

    Dubfire Byte Poster

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    Hi, i'm attempting to set up trunking 801Q on a 2621 router with software version 11.3 (2) XA4. Looks like this IOS does not support trunking according to the Cisco feature tool mentioned in an earlier post. How do I/or where can i download a newer IOS for my router to enable trunking it it's sub interfaces?
     
    Certifications: N+, 270.
    WIP: 291 then 284 for the MCSA.. ITIL...

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