how to set a vlan connection for cisco 2950, 3550 and 2900?

Discussion in 'Cisco' started by Little, Jun 22, 2004.

  1. Little

    Little Guest

    I've a newbie on cisco, please help.

    A 2900 switch, all ports ==> vlan2 (10.1.1.0/24), which is the
    management network. (no port is assigned to vlan1)
    A 2950 switch, port 1-22 ==> vlan1 (192.168.201.0/24), which is the
    production network.
    A 3550 switch, Gig 1-8 ==> vlan1 (192.168.201.0/24), which is also the
    production network.

    A MRTG+BB server is setup at 10.1.1.0 network, I want the MRTG server
    can capture the traffic of 2950 and 3550. I tried to use vlan to hook
    up the 3 devices, but failed. I've already connected the Fa0/23 of
    2950 and Fa0/2 of 3550 to the 2900 by cross cables.

    I want both the Fa0/23 of 2950 and Fa0/2 of 3550 can have the 10.1.1.x
    ip setup, so the mrtg server can connect to them. But I have no idea
    how to do it and how to setup the vlan for both, can anyone help?
    Many thanks.
     
    Little, Jun 22, 2004
    #1
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  2. Little

    Bill F Guest

    You've created 2 vlans with 2 associated ip subnetworks. You can only
    address a vlan interface on it's associated subnet, i.e
    vlan 1 192.168.201.x/24
    vlan 2 10.1.1.x/24

    You can create a vlan interface for both on any/all of the switches .
    You'll also want to trunk the uplink ports.

    Little wrote:
    > I've a newbie on cisco, please help.
    >
    > A 2900 switch, all ports ==> vlan2 (10.1.1.0/24), which is the
    > management network. (no port is assigned to vlan1)
    > A 2950 switch, port 1-22 ==> vlan1 (192.168.201.0/24), which is the
    > production network.
    > A 3550 switch, Gig 1-8 ==> vlan1 (192.168.201.0/24), which is also the
    > production network.
    >
    > A MRTG+BB server is setup at 10.1.1.0 network, I want the MRTG server
    > can capture the traffic of 2950 and 3550. I tried to use vlan to hook
    > up the 3 devices, but failed. I've already connected the Fa0/23 of
    > 2950 and Fa0/2 of 3550 to the 2900 by cross cables.
    >
    > I want both the Fa0/23 of 2950 and Fa0/2 of 3550 can have the 10.1.1.x
    > ip setup, so the mrtg server can connect to them. But I have no idea
    > how to do it and how to setup the vlan for both, can anyone help?
    > Many thanks.
     
    Bill F, Jun 22, 2004
    #2
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  3. Little

    Guest Guest

    Thanks for your reply. I did try to add vlan 2 at 2950, but it is always
    shutdown. Then if I typed "no shutdown" for vlan 2, it will down vlan 1.

    I also tried to add the following codes at Fa0/23 of 2950 without creating a
    vlan 2 at 2950 and it turns out I can ping from 2950 to the 10.1.1.254,
    which is the 2900 ip:
    switchport access vlan 2
    switchport mode trunk

    However, I don't know where to set the 10.1.1.x ip for 2950. Any idea?

    "Bill F" <> wrote in message
    news:...
    > You've created 2 vlans with 2 associated ip subnetworks. You can only
    > address a vlan interface on it's associated subnet, i.e
    > vlan 1 192.168.201.x/24
    > vlan 2 10.1.1.x/24
    >
    > You can create a vlan interface for both on any/all of the switches .
    > You'll also want to trunk the uplink ports.
    >
    > Little wrote:
    > > I've a newbie on cisco, please help.
    > >
    > > A 2900 switch, all ports ==> vlan2 (10.1.1.0/24), which is the
    > > management network. (no port is assigned to vlan1)
    > > A 2950 switch, port 1-22 ==> vlan1 (192.168.201.0/24), which is the
    > > production network.
    > > A 3550 switch, Gig 1-8 ==> vlan1 (192.168.201.0/24), which is also the
    > > production network.
    > >
    > > A MRTG+BB server is setup at 10.1.1.0 network, I want the MRTG server
    > > can capture the traffic of 2950 and 3550. I tried to use vlan to hook
    > > up the 3 devices, but failed. I've already connected the Fa0/23 of
    > > 2950 and Fa0/2 of 3550 to the 2900 by cross cables.
    > >
    > > I want both the Fa0/23 of 2950 and Fa0/2 of 3550 can have the 10.1.1.x
    > > ip setup, so the mrtg server can connect to them. But I have no idea
    > > how to do it and how to setup the vlan for both, can anyone help?
    > > Many thanks.

    >
     
    Guest, Jun 22, 2004
    #3
  4. Little

    Bill F Guest

    Little wrote:
    > Thanks for your reply. I did try to add vlan 2 at 2950, but it is always
    > shutdown. Then if I typed "no shutdown" for vlan 2, it will down vlan 1.


    I don't know why that is. What's the output of "sh vlan"
    and "sh vtp status" on each switch. You should see both vlans listed.

    >
    > I also tried to add the following codes at Fa0/23 of 2950 without creating a
    > vlan 2 at 2950 and it turns out I can ping from 2950 to the 10.1.1.254,
    > which is the 2900 ip:
    > switchport access vlan 2 # you can remove this line
    > switchport mode trunk


    ...add
    switchport trunk encapsulation dot1q

    >
    > However, I don't know where to set the 10.1.1.x ip for 2950. Any idea?
    >


    You have to create the vlan 2 int to be able to address it on that subnet.
     
    Bill F, Jun 22, 2004
    #4
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