Cant get both vlans to come up!!!

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  EdTheLad Member Posts: 2,111 ■■■■□□□□□□

  October 2006

  The 2924 is a layer 2 switch, it will only support 1 vlan interface at one time for management.You are supposed to assign physical ports to vlans and thats it, this box is not layer 3 aware!

  Networking, sometimes i love it, mostly i hate it.Its all about the $$$$

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  ceejay3001 Member Posts: 36 ■■□□□□□□□□

  October 2006

  im setting up these vlans and going to route between them using dot1q..
  iv been told this is possible using a 2924 switch and 2621 router
  
  im a little confused by ur comment - if only one vlan can be up -- why have vlans!! sorry i should have mentioned i was carrying out router on a stick -

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  EdTheLad Member Posts: 2,111 ■■■■□□□□□□

  October 2006

  The dot1.q is configured on the routers subinterface, this is so the router subinterface can differentiate between the different frames arriving on the trunk port.A vlan is used to segment the switch into multiple broadcast domains.So you are effectively isolating ports into groups,each group you will assign a vlan id.On the router you will match a vlan id to a subnet.You will then connect hosts i.e. pc's with the correct ip address to the corresponding switch port. The PC will have the default gateway that matches the router subinterface.
  When you assign an ip address to a vlan id,this ip address is used to manage the switch,the switch can only support one management ip address.You should really have covered this in the ccna.

  Networking, sometimes i love it, mostly i hate it.Its all about the $$$$

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  garv221 Member Posts: 1,914

  October 2006

  ed is saying you cannot have more than 1 vlan interface on that switch. You can have multiple vlans assinged to that switch, but the interfaces need to on a different device. I have a 4506 switch that handles a config similiar to yours.

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  david_r Member Posts: 112

  October 2006

  ceejay,
  I think what ed is trying to say is you should pull your .1 IPs from your VLAN interfaces, place your ports into whatever VLANs you want and build your router on a stick on your 2600 with something like:
  
  int fa 0/1
  no ip address
  interface 0/1.1
  encap dot1q 1 native
  ip adddress 10.0.0.1 255.254.0.0
  interface 0/1.2
  encap dot1q 2
  ip address 10.2.0.1 255.254.0.0
  etc.
  
  Then assign a management IP to your VLAN1. The IP address on the layer 2 device is ONLY so you can manage it. Remember that vlan tagging happens at layer 2, not layer 3.
  
  You can see that your vlans are active. You can also issue a show command from the vlan database and they will say "operational." If you want to remove the vlan interfaces you created, do so from config mode. If you want to remove a vlan, do so from the vlan database.

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  ceejay3001 Member Posts: 36 ■■□□□□□□□□

  October 2006

  thanks guys this makes complete sense to me now - the reason i had the config showed -was because i had this set up on 4507 at work - which is layer 3 - the help is much appreciated -- its been a while since i covered the ccna now - u know how it is!!!

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  rossonieri#1 Member Posts: 799 ■■■□□□□□□□

  October 2006

  hello forlks:)
  
  hahaha...
  reading this reminds me of my BOSS:)
  
  cheers:)

  the More I know, that is more and More I dont know.

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  Danman32 Member Posts: 1,243

  October 2006

  I didn't think it mattered if you assigned an IP to each VLAN. True it won't route, but that's not the point of the IP. Depending on which VLAN your Telnet client was coming in from, you'd use the IP assigned to the VLAN the client was connected to. If you didn't have a router, that's the only way you could do it.

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  Webmaster Admin Posts: 10,292 Admin

  October 2006

  You can create many VLAN interfaces, or management VLAN interfaces, but only one can be active at the same time (on a L2 2950 switch for example). This is because the VSI uses the switch's base MAC address, which can only be assigned to one IP address / vlan interface. This why the VLAN 2 and 3 interfaces don't come up in the example of the OP.

  LinkedIn - FaceBook

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  rossonieri#1 Member Posts: 799 ■■■□□□□□□□

  October 2006

  i think the webmaster has answered it
  
  even an L3 device wont have the vlan interface IP come up if you dont have any cable plugged.
  
  cheers..

  the More I know, that is more and More I dont know.

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