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vlan encapsulation on a sub interface

Discussion in 'General Cisco Certifications' started by durairaj29, Sep 20, 2007.

  1. durairaj29

    durairaj29 New Member

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    configuring encapsulation on a sub interface
    « on: May 31, 2007, 04:33:05 AM »

    hi all ,the problem i am having is ,when i go to configure a vlan and begin to set up the sub-interfaces on a router (2503) for inter vlan routing
    i get this error
    router (config-if)# int e/0.1
    router (config sub-if) encapsulation (as the up arrow indicates word is unrecognised
    ^
    i am obviously trying to type in................ router(config sub-if)# encapsulation dot1q 10

    i have tried router (config-if)# int e/0.1
    router (config sub-if)#ip address 192.168.1.1 255.255.255.0
    router (config sub-if) encapsulation
    and ^

    router (config-if)# int e/0.1
    router (config sub-if) encapsulation dot1q
    ^

    but either way it spits the dummy and wont let me enter the encapsulation cmd
    as i said before i am running a 2503 router with cisco ios ver 12

    Any suggestions would be greatly appreciated
     
  2. r.h.lee

    r.h.lee Gigabyte Poster

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    durairaj29,

    At the Priviledged EXEC Mode prompt, type "show version" and tell us what "System Image File" you're using?
     
    Certifications: MCSE, MCP+I, MCP, CCNA, A+
    WIP: CCDA
  3. durairaj29

    durairaj29 New Member

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    hi ,
    Thanks for your reply, as per your information i configured the vlan go through the attachment i have sended the print shot of vlan configuration, iam getting the error message whenever iam using "sh interfaces trunk" i gone mad, from the last one week iam getting the same problem, i dont have any clue, pls guide me through this
    NOTE: iam using 2950 switch
    & 2600 router
    pls give me a easy example of diffrence between switchport mode access & switchport mode truk & whenever we have to this command.

    Thankx
    as per your information i configured the vlan but

    pls if u could have got time than pls give me one example how to configure VLAN for a 1900 switch and 2950. & put an interface in a specific VLAN and access mode & to set an interface in trunking mode and enabling the correct trunking encapsulation.
     

    Attached Files:

  4. geezer

    geezer New Member

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    Did you get this sorted or still happening as I am not sure if trunking on 2503 is possible but I am using IOS 11.3.

    From a fast ethernet port you would type 'trunk on' for the 1900 (only supports isl) to set this port as a trunk port to connect to trunk port on switch on isl encapsulated router eth port.

    For a 2950 you would type 'switchport mode trunk' to set the fast eth port as a trunk port but the 2950 only uses 802.1q encapsulation (dot1q) strangely enough so can't use with a 1900 switch to trunk between due to mismatched trunk encapsulations.

    The 'switchport access' command is used to assign a vlan to a port or removed a port from being a trunked port.

    To set a port to a VLAN on a 1900 you enter the port and type 'vlan-membership static #' where # = vlan number
    To set a port to a VLAN on a 2950 you enter the port and type 'switchport access vlan #'

    Hope this helps.
     
    Certifications: CCNA

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