cisco 3560 layer 3 switch question

Discussion in 'Cisco' started by cantonese boy, Oct 29, 2007.

  1. Hi,

    I'm new in cisco networking.
    I have 3 cisco 3560 layer 3 switch. I defined the vlan
    as follow: (vlan1 is the manangment vlan)
    I can ping from server1 (on switch1) to server2/server3 (on switch2).

    I can ping back from server2 (on switch2) to server1 (on switch1).
    I can ping back from server3 (on switch2) to server1 (on switch1).

    I can ping from server4 (on switch3) to server2/server3 (on switch2).
    I can ping from server4 (on switch3) to server1 (on switch1).

    I can ping from server5 (on switch3) to server3 (on switch2).
    But I found I can't ping from server5 (on switch3) to server2 (on switch2).
    OR I found I can't ping from server5 (on switch3) to server1 (on switch1).

    My question is, Is that possible to make a connection between server5
    (which is on vlan4 of switch 3) to the server1 or server2 (which is on
    vlan2).
    ( Certainly , I can ping from server5 to server4.)
    ======================================================================
    [switch1] vlan1:180.40.1.254 vlan2:180.42.1.254 {port 1-23}

    [switch2] vlan1:180.40.1.253 vlan2:180.42.1.253 {port 1-12}
    vlan3:180.42.33.254{port 13-22}
    vlan4:180.42.31.253{no port assigned)

    [switch3] vlan1:180.40.1.252 vlan2:180.42.1.252 {port 1-12}
    vlan3:180.42.33.253{no port assigned}
    vlan4:180.42.31.254{port 13-23}

    (vlan 2)
    ---------
    |server1|
    ---------
    |
    |
    -------------------------------------
    | 1| 3| 5| 7| 9|11|13|15|17|19|21|23|
    ------------------------------------- [switch1]
    | 2| 4| 6| 8|10|12|14|16|18|20|22|24|
    -------------------------------------
    |
    |
    |
    (vlan 2) (vlan 3) |
    --------- --------- |
    |server2| |server3| |
    --------- --------- |
    | | |
    | | |
    -------------------------------------
    | 1| 3| 5| 7| 9|11|13|15|17|19|21|23|
    ------------------------------------- [switch2]
    | 2| 4| 6| 8|10|12|14|16|18|20|22|24|
    -------------------------------------
    |
    |
    |
    (vlan 2) (vlan 4) |
    --------- --------- |
    |server4| |server5| |
    --------- --------- |
    | | |
    | | |
    -------------------------------------
    | 1| 3| 5| 7| 9|11|13|15|17|19|21|23|
    ------------------------------------- [switch3]
    | 2| 4| 6| 8|10|12|14|16|18|20|22|24|
    -------------------------------------

    (P.S. All server have the default gateway to the corresponding vlan segment)

    Thank you very much for any help,

    Wayne Wan
    cantonese boy, Oct 29, 2007
    #1
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  2. cantonese boy

    Trendkill Guest

    On Oct 29, 10:14 am, cantonese boy <> wrote:
    > Hi,
    >
    > I'm new in cisco networking.
    > I have 3 cisco 3560 layer 3 switch. I defined the vlan
    > as follow: (vlan1 is the manangment vlan)
    > I can ping from server1 (on switch1) to server2/server3 (on switch2).
    >
    > I can ping back from server2 (on switch2) to server1 (on switch1).
    > I can ping back from server3 (on switch2) to server1 (on switch1).
    >
    > I can ping from server4 (on switch3) to server2/server3 (on switch2).
    > I can ping from server4 (on switch3) to server1 (on switch1).
    >
    > I can ping from server5 (on switch3) to server3 (on switch2).
    > But I found I can't ping from server5 (on switch3) to server2 (on switch2).
    > OR I found I can't ping from server5 (on switch3) to server1 (on switch1).
    >
    > My question is, Is that possible to make a connection between server5
    > (which is on vlan4 of switch 3) to the server1 or server2 (which is on
    > vlan2).
    > ( Certainly , I can ping from server5 to server4.)
    > ======================================================================
    > [switch1] vlan1:180.40.1.254 vlan2:180.42.1.254 {port 1-23}
    >
    > [switch2] vlan1:180.40.1.253 vlan2:180.42.1.253 {port 1-12}
    > vlan3:180.42.33.254{port 13-22}
    > vlan4:180.42.31.253{no port assigned)
    >
    > [switch3] vlan1:180.40.1.252 vlan2:180.42.1.252 {port 1-12}
    > vlan3:180.42.33.253{no port assigned}
    > vlan4:180.42.31.254{port 13-23}
    >
    > (vlan 2)
    > ---------
    > |server1|
    > ---------
    > |
    > |
    > -------------------------------------
    > | 1| 3| 5| 7| 9|11|13|15|17|19|21|23|
    > ------------------------------------- [switch1]
    > | 2| 4| 6| 8|10|12|14|16|18|20|22|24|
    > -------------------------------------
    > |
    > |
    > |
    > (vlan 2) (vlan 3) |
    > --------- --------- |
    > |server2| |server3| |
    > --------- --------- |
    > | | |
    > | | |
    > -------------------------------------
    > | 1| 3| 5| 7| 9|11|13|15|17|19|21|23|
    > ------------------------------------- [switch2]
    > | 2| 4| 6| 8|10|12|14|16|18|20|22|24|
    > -------------------------------------
    > |
    > |
    > |
    > (vlan 2) (vlan 4) |
    > --------- --------- |
    > |server4| |server5| |
    > --------- --------- |
    > | | |
    > | | |
    > -------------------------------------
    > | 1| 3| 5| 7| 9|11|13|15|17|19|21|23|
    > ------------------------------------- [switch3]
    > | 2| 4| 6| 8|10|12|14|16|18|20|22|24|
    > -------------------------------------
    >
    > (P.S. All server have the default gateway to the corresponding vlan segment)
    >
    > Thank you very much for any help,
    >
    > Wayne Wan


    You are talking about a layer 3 issue it sounds like. Where is the
    router interface for VLAN 4? Can server 5 ping its gateway? How
    about ping server 4 on the same switch? If not, you need to check
    trunking of vlan 4 back to the router that owns all these networks.
    Trendkill, Oct 29, 2007
    #2
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