Lab 2-Task 1.1 VLAN assignments

Dear All,

My VLAN information is not propagated to all the switches (SW2, SW3, SW4). SW1 is configured as server and other switches configured as client. Password and domain is right.  Any advice will be highly appreciated.

 

 

 

Comments

  • On SW1 enable VTP Version 2 and see if VLAN info progogates

  • Here are a few ideas:

    1 - Make sure all of your trunk links are up - both ends of each trunk link should agree that the interface is trunking, and both ends should show the same trunking protocol

    2 - After all trunk links are up add a new vlan on the vtp server - see if the new vlan causes vtp propagation to the client switches

    3 - Reset the vtp domain and password on all switches to make sure the password and domain agree across all switches

    4 - Use "show spanning-tree vlan 1" to see if all switches agree on the root switch - if they do not agree, trunk links are not working properly

    5 - Try shut/no shut on trunk links to establish trunking

    If you are using 3550 switches, any interface connecting to another 3550 switch or to a 3560 switch should automatically negotiate trunking unless the default "switchport mode dynamic desirable" is changed. To establish trunking between two 3560 switches the mode will need to be changed from the default "switchport mode dynamic auto" to "... desirable" on at least one end, or to "switchport mode on" on both ends of the trunk link.

    If your trunks are working, there should be no problem with vtp propagation to the client switches.

  • Thanks Darell,

    This is still not working. I am really lost. I am using 3750 switches except SW4 which is 4503. I am using a hub between SW3 and SW4 to connect them to R4 fa 0/1.  From SW4 I was not able to ping even R4. Do you think I have to create sub-interface in R4 and enable encapsulation?

     

  • How are the ports connecting to the hub/R4 configured? (Access/Trunk)

    When you use "show interfaces trunk" or "show spanning-tree vlan x" does the output show that the interfaces are forwarding? (Not blocked by spanning-tree)

    If the links are trunking, and the vlan R4 should be communicating on is not the dot1q native vlan, R4 would need to use a subinterface with "encapsulation dot1q x". (Or if "vlan dot1q tag native" is on)

  • Hi Darrell,

    Lets make things simple. The two switches SW1 and SW2 is connected via a cross over cable. From SW1 port Fa 1/0/6 to SW2 gi 1/0/1 is connected. I am pretty sure VTP domain and password is right. VLAN  information still not propagating. Both are 3750 switches. I am sure I am missing something. Here is the output from both the switches.

     

    SW1#sh ip int b
    Interface              IP-Address      OK? Method Status                Protocol
    Vlan1                  unassigned      YES unset  up                    up
    Vlan783                204.12.1.7      YES manual up                    up
    FastEthernet1/0/1      132.1.17.7      YES manual up                    up
    FastEthernet1/0/2      unassigned      YES unset  down                  down
    FastEthernet1/0/3      unassigned      YES unset  down                  down
    FastEthernet1/0/4      unassigned      YES unset  up                    up
    FastEthernet1/0/5      unassigned      YES unset  down                  down
    FastEthernet1/0/6      unassigned      YES unset  up                    up
    FastEthernet1/0/7      unassigned      YES unset  down                  down
    FastEthernet1/0/8      unassigned      YES unset  down                  down
    FastEthernet1/0/9      unassigned      YES unset  down                  down
    FastEthernet1/0/10     unassigned      YES unset  down                  down
    FastEthernet1/0/11     unassigned      YES unset  down                  down
    FastEthernet1/0/12     unassigned      YES unset  down                  down
    FastEthernet1/0/13     unassigned      YES unset  up                    up
    FastEthernet1/0/14     unassigned      YES unset  up                    up
    FastEthernet1/0/15     unassigned      YES unset  up                    up
    FastEthernet1/0/16     unassigned      YES unset  up                    up
    FastEthernet1/0/17     unassigned      YES unset  up                    up
    FastEthernet1/0/18     unassigned      YES unset  administratively down down
    FastEthernet1/0/19     unassigned      YES unset  up                    up
    FastEthernet1/0/20     unassigned      YES unset  up                    up
    FastEthernet1/0/21     unassigned      YES unset  administratively down down
    FastEthernet1/0/22     unassigned      YES unset  down                  down
    FastEthernet1/0/23     unassigned      YES unset  down                  down
    FastEthernet1/0/24     unassigned      YES unset  down                  down
    GigabitEthernet1/0/1   unassigned      YES unset  down                  down
    GigabitEthernet1/0/2   unassigned      YES unset  down                  down
    GigabitEthernet1/1/1   unassigned      YES unset  down                  down
    GigabitEthernet1/1/2   unassigned      YES unset  down                  down
    Port-channel1          unassigned      YES unset  up                    up
    Port-channel2          unassigned      YES unset  up                    up
    Port-channel3          unassigned      YES unset  up                    up
    Loopback0              150.1.7.7       YES manual up                    up
    SW1#
    SW1#sh int trunk

    Port        Mode         Encapsulation  Status        Native vlan
    Fa1/0/6     on           802.1q         trunking      1
    Po1         on           isl            trunking      1
    Po2         on           802.1q         trunking      783
    Po3         desirable    n-isl          trunking      1

    Port      Vlans allowed on trunk
    Fa1/0/6     1-4094
    Po1         1-4094
    Po2         1-4094
    Po3         1-4094

    Port        Vlans allowed and active in management domain
    Fa1/0/6     1,3,5-6,8,10,15,24,26,28,33,45-46,52,56,102,105,107,255,783
    Po1         1,3,5-6,8,10,15,24,26,28,33,45-46,52,56,102,105,107,255,783
    Po2         1,3,5-6,8,10,15,24,26,28,33,45-46,52,56,102,105,107,255,783
    Po3         1,3,5-6,8,10,15,24,26,28,33,45-46,52,56,102,105,107,255,783

    Port        Vlans in spanning tree forwarding state and not pruned
    Fa1/0/6     3,5,8,10,15,24,26,28,33,45-46,52,56,102,105,107,255,783
    Po1         1,3,5-6,8,10,15,24,26,28,33,45-46,52,56,102,105,107,255,783
    Po2         1,3,5-6,8,10,15,24,26,28,33,45-46,52,56,102,105,107,255,783

    Port        Vlans in spanning tree forwarding state and not pruned
    Po3         1,3,5-6,8,10,15,24,26,28,33,45-46,52,56,102,105,107,255,783
    SW1#sh spa
    SW1#sh spanning-tree vlan 783

    VLAN0783
      Spanning tree enabled protocol ieee
      Root ID    Priority    33551
                 Address     0022.56c1.c780
                 This bridge is the root
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

      Bridge ID  Priority    33551  (priority 32768 sys-id-ext 783)
                 Address     0022.56c1.c780
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
                 Aging Time 300

    Interface        Role Sts Cost      Prio.Nbr Type
    ---------------- ---- --- --------- -------- --------------------------------
    Fa1/0/4          Desg FWD 19        128.6    P2p
    Fa1/0/6          Desg FWD 19        128.8    P2p
    Po1              Desg FWD 9         128.616  P2p
    Po2              Desg FWD 12        128.624  P2p
    Po3              Desg FWD 12        128.632  P2p

    SW1#
    SW1#sh run int fa 1/0/6
    Building configuration...

    Current configuration : 120 bytes
    !
    interface FastEthernet1/0/6
     switchport trunk encapsulation dot1q
     switchport mode trunk
     switchport nonegotiate
    end

     

     

     

    >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

    SW2#sh ip int b
    Interface              IP-Address      OK? Method Status                Protocol
    Vlan1                  unassigned      YES NVRAM  up                    up
    Vlan8                  132.1.8.8       YES NVRAM  down                  down
    Vlan783                204.12.1.8      YES NVRAM  down                  down
    GigabitEthernet1/0/1   unassigned      YES unset  up                    up
    GigabitEthernet1/0/2   unassigned      YES unset  down                  down
    GigabitEthernet1/0/3   unassigned      YES unset  down                  down
    GigabitEthernet1/0/4   unassigned      YES unset  down                  down
    GigabitEthernet1/0/5   unassigned      YES unset  down                  down
    GigabitEthernet1/0/6   unassigned      YES unset  down                  down
    GigabitEthernet1/0/7   unassigned      YES unset  down                  down
    GigabitEthernet1/0/8   unassigned      YES unset  down                  down
    GigabitEthernet1/0/9   unassigned      YES unset  down                  down
    GigabitEthernet1/0/10  unassigned      YES unset  down                  down
    GigabitEthernet1/0/11  unassigned      YES unset  down                  down
    GigabitEthernet1/0/12  unassigned      YES unset  down                  down
    GigabitEthernet1/0/13  unassigned      YES unset  up                    up
    GigabitEthernet1/0/14  unassigned      YES unset  up                    up
    GigabitEthernet1/0/15  unassigned      YES unset  up                    up
    GigabitEthernet1/0/16  unassigned      YES unset  administratively down down
    GigabitEthernet1/0/17  unassigned      YES unset  administratively down down
    GigabitEthernet1/0/18  unassigned      YES unset  administratively down down
    GigabitEthernet1/0/19  unassigned      YES unset  administratively down down
    GigabitEthernet1/0/20  unassigned      YES unset  administratively down down
    GigabitEthernet1/0/21  unassigned      YES unset  administratively down down
    GigabitEthernet1/0/22  unassigned      YES unset  down                  down
    GigabitEthernet1/0/23  unassigned      YES unset  down                  down
    GigabitEthernet1/0/24  unassigned      YES unset  down                  down
    GigabitEthernet1/0/25  unassigned      YES unset  down                  down
    GigabitEthernet1/0/26  unassigned      YES unset  down                  down
    GigabitEthernet1/0/27  unassigned      YES unset  down                  down
    GigabitEthernet1/0/28  unassigned      YES unset  down                  down
    Port-channel1          unassigned      YES unset  up                    up
    Loopback0              150.1.8.8       YES NVRAM  up                    up

    SW2#sh run int gigabitEthernet 1/0/1
    Building configuration...

    Current configuration : 155 bytes
    !
    interface GigabitEthernet1/0/1
     switchport trunk encapsulation dot1q
     switchport trunk native vlan 6
     switchport mode trunk
     switchport nonegotiate
    end


    SW2#sh int trunk

    Port        Mode         Encapsulation  Status        Native vlan
    Gi1/0/1     on           802.1q         trunking      6
    Po1         on           isl            trunking      1

    Port        Vlans allowed on trunk
    Gi1/0/1     1-4094
    Po1         1-4094

    Port        Vlans allowed and active in management domain
    Gi1/0/1     1,6,28,33,45-46,102,105,107
    Po1         1,6,28,33,45-46,102,105,107

    Port        Vlans in spanning tree forwarding state and not pruned
    Gi1/0/1     none
    Po1         1,6,28,33,45-46,102,105,107
    SW2#sh spann
    SW2#sh spanning-tree vlan 783

    Spanning tree instance(s) for vlan 783 does not exist.

    SW2#
    04:30:46: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/0/1 (6), with SW1 FastEthernet1/0/6 (1).
    SW2#sh spanning-tree vlan 1

    VLAN0001
      Spanning tree enabled protocol ieee
      Root ID    Priority    32769
                 Address     001d.45f5.3e40
                 Cost        21
                 Port        488 (Port-channel1)
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

      Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
                 Address     0022.be4e.fe80
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
                 Aging Time 300

    Interface        Role Sts Cost      Prio.Nbr Type
    ---------------- ---- --- --------- -------- --------------------------------
    Gi1/0/1          Desg BKN*19        128.1    P2p *PVID_Inc
    Po1              Root FWD 9         128.488  P2p

    SW2#

  • I think you have a native VLAN mismatch on the trunk ports. Try changing the native vlan on SW2. Issue the command switchport trunk native vlan 1 on int gi1/0/1 on SW2

     

  • Thanks Shaffeel,

    Still not working. It happened in LAB 1 as well. But I just skip that time. Do I have to create a new vlan.dat file in the switches for the new LAB. There was some VLAN details from LAB 1.

     

  • To clear prior vlan data you can "del vlan.dat" and then reload the switches - if you still have previous data on one of your switches and trunk links form, the old data will overwrite the blank vlan database(s) on the other switch(es).

    You can also try "no vlan 2-1001" in configuration mode. If you are still having problems, delete vlan.dat on all of the switches and reload all switches at the same time.

    What does "show etherchannel summary" show for both ends of your portchannel interfaces?

  • i'm hitting a bump on task 1.3

    -i've setup vlans on Sw1 and enabled as the Server

    -got the etherchannel up

    -i'm able to see the trunk status up and running on both switches

    *unable to see the vlans propagate to SW3

    a "sh spanning-tree vlan 1" on both switches shows that SW3(CAT3550) is the root for the port-channel. I'm guessing this is why it doesn't want to read the vlans from SW1(CAT3750). Outputs below, any advice pls

     

    etherchannel

    SW1


    Group  Port-channel  Protocol    Ports
    ------+-------------+-----------+-----------------------------------------------
    1      Po1(SU)          -        Fa1/0/13(P) Fa1/0/14(P) Fa1/0/15(P)
    2      Po2(SU)         LACP      Fa1/0/16(P) Fa1/0/17(P) Fa1/0/18(P)

     

    SW3


    Group  Port-channel  Protocol    Ports
    ------+-------------+-----------+-----------------------------------------------
    2      Po2(SU)         LACP      Fa0/13(P)   Fa0/14(P)   Fa0/15(P)  

     

     

    Spanning-tree

    SW1

    VLAN0001
      Spanning tree enabled protocol ieee
      Root ID    Priority    32769
                 Address     000f.2395.ab80
                 Cost        9
                 Port        616 (Port-channel1)
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

      Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
                 Address     0015.6260.c500
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
                 Aging Time 300

    Interface        Role Sts Cost      Prio.Nbr Type
    ---------------- ---- --- --------- -------- --------------------------------
    Po1              Root FWD 9         128.616  P2p
    Po2              Desg FWD 9         128.624  P2p

     

    SW3

    VLAN0001
      Spanning tree enabled protocol ieee
      Root ID    Priority    32769
                 Address     000f.2395.ab80
                 Cost        18
                 Port        65 (Port-channel2)
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

      Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
                 Address     0013.1ab4.7080
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
                 Aging Time 300

    Interface        Role Sts Cost      Prio.Nbr Type
    ---------------- ---- --- --------- -------- --------------------------------
    Fa0/3            Desg FWD 19        128.3    P2p
    Fa0/5            Desg FWD 19        128.5    P2p
    Fa0/24           Desg FWD 19        128.24   P2p
    Po2              Root FWD 9         128.65   P2p

     

     

     

     






  • What is SW3 configured as vtp? Do a show vtp status, make sure SW3 is a client in the same VTP domain as SW1.


    Thanks

    Erik Nixon





    From: [email protected]
    To: [email protected]
    Date: Mon, 8 Jun 2009 03:22:17 -0700
    Subject: Re: [IEWB-RS-VOL2-V4-LAB2] Lab 2-Task 1.1 VLAN assignments

    i'm hitting a bump on task 1.3

    -i've setup vlans on Sw1 and enabled as the Server

    -got the etherchannel up

    -i'm able to see the trunk status up and running on both switches

    *unable to see the vlans propagate to SW3

    a "sh spanning-tree vlan 1" on both switches shows that SW3(CAT3550) is the root for the port-channel. I'm guessing this is why it doesn't want to read the vlans from SW1(CAT3750). Outputs below, any advice pls

     

    etherchannel

    SW1


    Group  Port-channel  Protocol    Ports
    ------+-------------+-----------+-----------------------------------------------
    1      Po1(SU)          -        Fa1/0/13(P) Fa1/0/14(P) Fa1/0/15(P)
    2      Po2(SU)         LACP      Fa1/0/16(P) Fa1/0/17(P) Fa1/0/18(P)

     

    SW3


    Group  Port-channel  Protocol    Ports
    ------+-------------+-----------+-----------------------------------------------
    2      Po2(SU)         LACP      Fa0/13(P)   Fa0/14(P)   Fa0/15(P)  

     

     

    Spanning-tree

    SW1

    VLAN0001
      Spanning tree enabled protocol ieee
      Root ID    Priority    32769
                 Address     000f.2395.ab80
                 Cost        9
                 Port        616 (Port-channel1)
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

      Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
                 Address     0015.6260.c500
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
                 Aging Time 300

    Interface        Role Sts Cost      Prio.Nbr Type
    ---------------- ---- --- --------- -------- --------------------------------
    Po1              Root FWD 9         128.616  P2p
    Po2              Desg FWD 9         128.624  P2p

     

    SW3

    VLAN0001
      Spanning tree enabled protocol ieee
      Root ID    Priority    32769
                 Address     000f.2395.ab80
                 Cost        18
                 Port        65 (Port-channel2)
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

      Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
                 Address     0013.1ab4.7080
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
                 Aging Time 300

    Interface        Role Sts Cost      Prio.Nbr Type
    ---------------- ---- --- --------- -------- --------------------------------
    Fa0/3            Desg FWD 19        128.3    P2p
    Fa0/5            Desg FWD 19        128.5    P2p
    Fa0/24           Desg FWD 19        128.24   P2p
    Po2              Root FWD 9         128.65   P2p

     

     

     

     



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  • fumbled with the vtp password with this one.

    "show vtp password" displayed the same password configured. however, looking further,the MD5 digest was just different for this switch. Tried to remove the password and put it in again and that didn't do.

    -deleted vlan.dat

    -reload

    -entered vtp configs again.

    MD5 digest showed the same and that fixed it.

  • Hi,

     

    Try a shut and no shut on the port channel interface and see if the vlan information get propagated.

  • Your SW1 F1/0/6 interface is in native vlan 1 and the SW2 g1/0/1 is native vlan 6.



    SW1#sh int trunk

    Port        Mode         Encapsulation  Status        Native vlan
    Fa1/0/6     on           802.1q         trunking      1
    Po1         on           isl            trunking      1
    Po2         on           802.1q         trunking      783
    Po3         desirable    n-isl          trunking      1



    SW2

    interface GigabitEthernet1/0/1
     switchport trunk encapsulation dot1q
     switchport trunk native vlan 6
     switchport mode trunk
     switchport nonegotiate
    end

    SW2#sh int trunk

    Port        Mode         Encapsulation  Status        Native vlan
    Gi1/0/1     on           802.1q         trunking      6
    Po1         on           isl            trunking      1

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