Cisco 1200 Access Point and Vlan Issue

Discussion in 'Cisco' started by jsallmann@wiscomp.com, Mar 11, 2006.

  1. Guest

    Hello Group,

    I am trying to finish configuring a Cisco 2950 switch, 1200 Access
    Point and a Cisco 871 router. My question involves Vlans. On the
    switch port and AP I have configured a VLAN4 that is only assigned on
    the Trunk Port. The AP is configured as native Vlan4 as well as the
    trunk switch port. The switch is also connected via trunk to a 871
    Router on FAstEth0 using native Vlan4. The question I have involves
    the IP Addressing of VLAN 4. On the Router I have a seperate subnet
    for Vlan4 for say 172.16.99.0/24. I have also configures the BVI1
    interface of the Access Point in the same subnet 172.16.99.12.
    Wireless Clients authenticate to he access point but do not pull down
    an IP address and if one is manually assigned cannot ping anything. Is
    this config correct? When I assign the Vlan4 interface on the router
    with the subnet 192.168.10.0/24 and the Access point BVI1 interface
    as 192.168.10.12/24 everything seems to work. The problem with that is
    that the Fastethernet0 interface on the router is assigned
    192.168.10.1/24 where all the PCs and Servers are located. I am trying
    to configure guest access for a wireless infrastruvture. So on the
    devices I have Vlan1 disabled, Vlan2 for Corporate users
    (192.168.10.0), VLAN3(172.16.29.0/24) for guest wireless access and
    VLAN4(172.16.99.0/24) for the trunking port Vlan.

    Any help would be appreciated.

    Thanks,

    Joe
    , Mar 11, 2006
    #1
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  2. On 11 Mar 2006 10:26:08 -0800, wrote:

    ~ Hello Group,
    ~
    ~ I am trying to finish configuring a Cisco 2950 switch, 1200 Access
    ~ Point and a Cisco 871 router. My question involves Vlans. On the
    ~ switch port and AP I have configured a VLAN4 that is only assigned on
    ~ the Trunk Port. The AP is configured as native Vlan4 as well as the
    ~ trunk switch port. The switch is also connected via trunk to a 871
    ~ Router on FAstEth0 using native Vlan4.

    Quick question: you don't have your switch configured to tag the
    native VLAN do you? If so, this won't work. The AP's BVI needs to
    be on an untagged native VLAN.

    ~ The question I have involves
    ~ the IP Addressing of VLAN 4. On the Router I have a seperate subnet
    ~ for Vlan4 for say 172.16.99.0/24. I have also configures the BVI1
    ~ interface of the Access Point in the same subnet 172.16.99.12.
    ~ Wireless Clients authenticate to he access point but do not pull down
    ~ an IP address

    Where do they get this IP address from - DHCP? Where is the DHCP server
    configured - on the AP?

    ~ and if one is manually assigned cannot ping anything.

    Not even the AP's BVI1?

    What wireless authentication/crypto are you using? With open
    authentication + WEP, a popular failure mode is that clients will
    associate but then be unable to pass traffic (due to a WEP key
    mismatch.)

    ~ Is
    ~ this config correct? When I assign the Vlan4 interface on the router
    ~ with the subnet 192.168.10.0/24 and the Access point BVI1 interface
    ~ as 192.168.10.12/24 everything seems to work.

    If you change 172.16.99/24 everywhere with 192.168.10/24, then there
    is (probably) no reason to see different behavior.

    ~ The problem with that is
    ~ that the Fastethernet0 interface on the router is assigned
    ~ 192.168.10.1/24

    Now you've lost me. I thought you said that the router's FastE
    was configured as a trunk? If so, then you shouldn't be configuring
    stuff on FastEthernet0, you should be configuring stuff on its
    VLAN interfaces.

    At some point, if you can't figure this out, you will want to
    draw some ASCII or other art showing all your VLANs and subnets
    and links and notes of interest, listing all your subnets and addresses
    of interest, and including all your configs.

    Aaron

    ---

    ~ where all the PCs and Servers are located. I am trying
    ~ to configure guest access for a wireless infrastruvture. So on the
    ~ devices I have Vlan1 disabled, Vlan2 for Corporate users
    ~ (192.168.10.0), VLAN3(172.16.29.0/24) for guest wireless access and
    ~ VLAN4(172.16.99.0/24) for the trunking port Vlan.
    ~
    ~ Any help would be appreciated.
    ~
    ~ Thanks,
    ~
    ~ Joe
    Aaron Leonard, Mar 13, 2006
    #2
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