4-port FE Switch HWIC and 2811

Discussion in 'Cisco' started by dt1649651@yahoo.com, May 6, 2005.

  1. Guest

    On my router 2811 with 4-port FE Switch HWIC, "show ip int bri" shows
    that it has :

    FastEthernet 0/0
    FastEthernet 0/1
    FastEthernet 0/0/0
    FastEthernet 0/0/1
    FastEthernet 0/0/2
    FastEthernet 0/0/3
    VLan1

    What I am trying to do with this router is to have three separate
    Ethernet interfaces, like
    FastEthernet 0/0
    FastEthernet 0/1
    and FastEthernet 0/2

    because I have three local LANs here.

    Is there any way to config this system to use the 4-port switch to work
    on separate interface instead of the 0/0 or 0/1 ?

    Any advice is greatly appreciated.

    Thanks,

    DT
    , May 6, 2005
    #1
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  2. Hi,

    Think of the switch module as a seperate switch. The switch offers
    switchports while the router offers routed-ports (by default).
    Configure the switchport to be a member of a certain vlan and use the
    switch's vlan interfaces to be the routed interface to the router. This way
    you get (for example):
    - Fa0/0, first network (integrated port of 2811)
    - Fa0/1, second network (integrated port of 2811)
    - VlanX, third network (virtual port, linked to physical port of switch
    module by vlan-mapping.)

    A configuration fragment:

    int FastEthernet0/0
    descriptuon my first network
    ip address 192.168.1.1 255.255.255.0
    !
    int FastEthernet0/1
    descriptuon my second network
    ip address 192.168.2.1 255.255.255.0
    !
    vlan 3 name mythirdnetwork
    int Vlan3
    descriptuon my third network
    ip address 192.168.3.1 255.255.255.0
    !
    int FastEthernet0/0/0
    switchport mode access
    switchport access vlan 3
    !

    it's up to you what you do with the other switch-module ports. You can
    assign them vlan 3 or any other vlan. As long as they do not match with a
    "int vlan-interface" they won't be able to communicate with Fa0/0, Fa0/1 or
    Vlan3

    Erik

    <> wrote in message
    news:...
    > On my router 2811 with 4-port FE Switch HWIC, "show ip int bri" shows
    > that it has :
    >
    > FastEthernet 0/0
    > FastEthernet 0/1
    > FastEthernet 0/0/0
    > FastEthernet 0/0/1
    > FastEthernet 0/0/2
    > FastEthernet 0/0/3
    > VLan1
    >
    > What I am trying to do with this router is to have three separate
    > Ethernet interfaces, like
    > FastEthernet 0/0
    > FastEthernet 0/1
    > and FastEthernet 0/2
    >
    > because I have three local LANs here.
    >
    > Is there any way to config this system to use the 4-port switch to work
    > on separate interface instead of the 0/0 or 0/1 ?
    >
    > Any advice is greatly appreciated.
    >
    > Thanks,
    >
    > DT
    >
    Erik Tamminga, May 6, 2005
    #2
    1. Advertising

  3. I've seen switches where it's possible to convert a switchport to a
    non-switching (routing) port. I don't know if this is the case with this
    switching module.
    If so you can assign any of the four ports an ip-address and issue the "no
    switchport" command to make it a routed port.

    Erik

    "Erik Tamminga" <> wrote in message
    news:d5gica$3i5$1.ov.home.nl...
    > Hi,
    >
    > Think of the switch module as a seperate switch. The switch offers
    > switchports while the router offers routed-ports (by default).
    > Configure the switchport to be a member of a certain vlan and use the
    > switch's vlan interfaces to be the routed interface to the router. This
    > way you get (for example):
    > - Fa0/0, first network (integrated port of 2811)
    > - Fa0/1, second network (integrated port of 2811)
    > - VlanX, third network (virtual port, linked to physical port of switch
    > module by vlan-mapping.)
    >
    > A configuration fragment:
    >
    > int FastEthernet0/0
    > descriptuon my first network
    > ip address 192.168.1.1 255.255.255.0
    > !
    > int FastEthernet0/1
    > descriptuon my second network
    > ip address 192.168.2.1 255.255.255.0
    > !
    > vlan 3 name mythirdnetwork
    > int Vlan3
    > descriptuon my third network
    > ip address 192.168.3.1 255.255.255.0
    > !
    > int FastEthernet0/0/0
    > switchport mode access
    > switchport access vlan 3
    > !
    >
    > it's up to you what you do with the other switch-module ports. You can
    > assign them vlan 3 or any other vlan. As long as they do not match with a
    > "int vlan-interface" they won't be able to communicate with Fa0/0, Fa0/1
    > or Vlan3
    >
    > Erik
    >
    > <> wrote in message
    > news:...
    >> On my router 2811 with 4-port FE Switch HWIC, "show ip int bri" shows
    >> that it has :
    >>
    >> FastEthernet 0/0
    >> FastEthernet 0/1
    >> FastEthernet 0/0/0
    >> FastEthernet 0/0/1
    >> FastEthernet 0/0/2
    >> FastEthernet 0/0/3
    >> VLan1
    >>
    >> What I am trying to do with this router is to have three separate
    >> Ethernet interfaces, like
    >> FastEthernet 0/0
    >> FastEthernet 0/1
    >> and FastEthernet 0/2
    >>
    >> because I have three local LANs here.
    >>
    >> Is there any way to config this system to use the 4-port switch to work
    >> on separate interface instead of the 0/0 or 0/1 ?
    >>
    >> Any advice is greatly appreciated.
    >>
    >> Thanks,
    >>
    >> DT
    >>

    >
    >
    Erik Tamminga, May 6, 2005
    #3
  4. Scooby Guest

    The behavior of these internal switches is a little wierd when it comes to
    that. If you can make them L3 ports, I would love to know how. But, the
    'no switchport' option does not work. You can configure them as part of a
    vlan as you originally suggested. The strange part is that there is an 'ip
    address' command available to the switchports. When you try to use it, it
    just tells you that you can not put an ip address on L2 links.

    The real trick would be to change the port to an L3 link, but I don't think
    that there is a way to do just that on these switch modules.

    Jim


    "Erik Tamminga" <> wrote in message
    news:d5gig4$4nb$1.ov.home.nl...
    > I've seen switches where it's possible to convert a switchport to a
    > non-switching (routing) port. I don't know if this is the case with this
    > switching module.
    > If so you can assign any of the four ports an ip-address and issue the "no
    > switchport" command to make it a routed port.
    >
    > Erik
    >
    > "Erik Tamminga" <> wrote in message
    > news:d5gica$3i5$1.ov.home.nl...
    > > Hi,
    > >
    > > Think of the switch module as a seperate switch. The switch offers
    > > switchports while the router offers routed-ports (by default).
    > > Configure the switchport to be a member of a certain vlan and use the
    > > switch's vlan interfaces to be the routed interface to the router. This
    > > way you get (for example):
    > > - Fa0/0, first network (integrated port of 2811)
    > > - Fa0/1, second network (integrated port of 2811)
    > > - VlanX, third network (virtual port, linked to physical port of switch
    > > module by vlan-mapping.)
    > >
    > > A configuration fragment:
    > >
    > > int FastEthernet0/0
    > > descriptuon my first network
    > > ip address 192.168.1.1 255.255.255.0
    > > !
    > > int FastEthernet0/1
    > > descriptuon my second network
    > > ip address 192.168.2.1 255.255.255.0
    > > !
    > > vlan 3 name mythirdnetwork
    > > int Vlan3
    > > descriptuon my third network
    > > ip address 192.168.3.1 255.255.255.0
    > > !
    > > int FastEthernet0/0/0
    > > switchport mode access
    > > switchport access vlan 3
    > > !
    > >
    > > it's up to you what you do with the other switch-module ports. You

    can
    > > assign them vlan 3 or any other vlan. As long as they do not match with

    a
    > > "int vlan-interface" they won't be able to communicate with Fa0/0, Fa0/1
    > > or Vlan3
    > >
    > > Erik
    > >
    > > <> wrote in message
    > > news:...
    > >> On my router 2811 with 4-port FE Switch HWIC, "show ip int bri" shows
    > >> that it has :
    > >>
    > >> FastEthernet 0/0
    > >> FastEthernet 0/1
    > >> FastEthernet 0/0/0
    > >> FastEthernet 0/0/1
    > >> FastEthernet 0/0/2
    > >> FastEthernet 0/0/3
    > >> VLan1
    > >>
    > >> What I am trying to do with this router is to have three separate
    > >> Ethernet interfaces, like
    > >> FastEthernet 0/0
    > >> FastEthernet 0/1
    > >> and FastEthernet 0/2
    > >>
    > >> because I have three local LANs here.
    > >>
    > >> Is there any way to config this system to use the 4-port switch to work
    > >> on separate interface instead of the 0/0 or 0/1 ?
    > >>
    > >> Any advice is greatly appreciated.
    > >>
    > >> Thanks,
    > >>
    > >> DT
    > >>

    > >
    > >

    >
    >
    Scooby, May 6, 2005
    #4
  5. If the "no switchport" command isn't available on any of the switch-module
    interfaces, than you can't configure these to be L3-intertfaces. About the
    "ip address" command; it's probably there because of some IOS code re-use
    and doesn't have a function on these ports.
    My suggestion is to map the switch-module ports 1:1 with vlanX interfaces to
    create "separate" interfaces/networks.

    Erik

    "Scooby" <> wrote in message
    news:KVQee.5076$...
    > The behavior of these internal switches is a little wierd when it comes to
    > that. If you can make them L3 ports, I would love to know how. But, the
    > 'no switchport' option does not work. You can configure them as part of a
    > vlan as you originally suggested. The strange part is that there is an 'ip
    > address' command available to the switchports. When you try to use it, it
    > just tells you that you can not put an ip address on L2 links.
    >
    > The real trick would be to change the port to an L3 link, but I don't
    > think
    > that there is a way to do just that on these switch modules.
    >
    > Jim
    >
    >
    > "Erik Tamminga" <> wrote in message
    > news:d5gig4$4nb$1.ov.home.nl...
    >> I've seen switches where it's possible to convert a switchport to a
    >> non-switching (routing) port. I don't know if this is the case with this
    >> switching module.
    >> If so you can assign any of the four ports an ip-address and issue the
    >> "no
    >> switchport" command to make it a routed port.
    >>
    >> Erik
    >>
    >> "Erik Tamminga" <> wrote in message
    >> news:d5gica$3i5$1.ov.home.nl...
    >> > Hi,
    >> >
    >> > Think of the switch module as a seperate switch. The switch offers
    >> > switchports while the router offers routed-ports (by default).
    >> > Configure the switchport to be a member of a certain vlan and use the
    >> > switch's vlan interfaces to be the routed interface to the router. This
    >> > way you get (for example):
    >> > - Fa0/0, first network (integrated port of 2811)
    >> > - Fa0/1, second network (integrated port of 2811)
    >> > - VlanX, third network (virtual port, linked to physical port of switch
    >> > module by vlan-mapping.)
    >> >
    >> > A configuration fragment:
    >> >
    >> > int FastEthernet0/0
    >> > descriptuon my first network
    >> > ip address 192.168.1.1 255.255.255.0
    >> > !
    >> > int FastEthernet0/1
    >> > descriptuon my second network
    >> > ip address 192.168.2.1 255.255.255.0
    >> > !
    >> > vlan 3 name mythirdnetwork
    >> > int Vlan3
    >> > descriptuon my third network
    >> > ip address 192.168.3.1 255.255.255.0
    >> > !
    >> > int FastEthernet0/0/0
    >> > switchport mode access
    >> > switchport access vlan 3
    >> > !
    >> >
    >> > it's up to you what you do with the other switch-module ports. You

    > can
    >> > assign them vlan 3 or any other vlan. As long as they do not match with

    > a
    >> > "int vlan-interface" they won't be able to communicate with Fa0/0,
    >> > Fa0/1
    >> > or Vlan3
    >> >
    >> > Erik
    >> >
    >> > <> wrote in message
    >> > news:...
    >> >> On my router 2811 with 4-port FE Switch HWIC, "show ip int bri" shows
    >> >> that it has :
    >> >>
    >> >> FastEthernet 0/0
    >> >> FastEthernet 0/1
    >> >> FastEthernet 0/0/0
    >> >> FastEthernet 0/0/1
    >> >> FastEthernet 0/0/2
    >> >> FastEthernet 0/0/3
    >> >> VLan1
    >> >>
    >> >> What I am trying to do with this router is to have three separate
    >> >> Ethernet interfaces, like
    >> >> FastEthernet 0/0
    >> >> FastEthernet 0/1
    >> >> and FastEthernet 0/2
    >> >>
    >> >> because I have three local LANs here.
    >> >>
    >> >> Is there any way to config this system to use the 4-port switch to
    >> >> work
    >> >> on separate interface instead of the 0/0 or 0/1 ?
    >> >>
    >> >> Any advice is greatly appreciated.
    >> >>
    >> >> Thanks,
    >> >>
    >> >> DT
    >> >>
    >> >
    >> >

    >>
    >>

    >
    >
    Erik Tamminga, May 8, 2005
    #5
  6. Guest

    Erik, Scooby,

    Thank you very much for your advice, and I am sorry for not having a
    prompt reply. I got to a conference and I tied the aux port to a modem.
    But now I just figured out that the wireless modem I have on my phone
    do not accept my normal ATDT commands and the long distance call is
    charged so high in the hotel :)

    When I figure out how to dial using my phone I will try and report
    back.

    DT
    , May 9, 2005
    #6
  7. Guest

    I 've just been able to assign each port an ip address of a different
    subnet like the method that Erik points out.

    I will have to read more about this switch before trying the "no
    switchport".

    Thanks,

    DT
    , May 10, 2005
    #7
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