+ Post New Thread
Results 1 to 5 of 5
Wireless Networks Thread, VLAN Help in Technical; We have 3 core switches connected by 10GBE 5406_1->5412->5406_2 On all 3 there are 2 VLANS 1 and 2. On ...
  1. #1

    Join Date
    Sep 2008
    Thank Post
    Thanked 20 Times in 13 Posts
    Rep Power

    VLAN Help

    We have 3 core switches connected by 10GBE 5406_1->5412->5406_2

    On all 3 there are 2 VLANS 1 and 2.

    On 5406_1 there are several ports which are untagged for VLAN2 and now I need to have some ports on 5406_2 that are untagged for VLAN2 which also need to communicate with the ports on 5406_1.

    My idea was to have a seccond backbone between the 3 switches that would be untagged for VLAN2. But when we set this up and connect the cables our network grinds to a halt.

    Am I going about this in the wrong way? Do I need to disable Tree Spanning?

  2. #2
    bio is offline
    bio's Avatar
    Join Date
    Apr 2008
    Thank Post
    Thanked 130 Times in 102 Posts
    Rep Power
    the 10GB interfaces on all 3 core switches should be configured with VLAN 1 untagged (if used for management) and VLAN 2 tagged. now you can assign untagged ports on your 1GB UTP interfaces (on 5604_1 and 5604_2)


  3. #3
    jimothy's Avatar
    Join Date
    Mar 2008
    Thank Post
    Thanked 1 Time in 1 Post
    Rep Power
    From my experience I would have tagged VLAN 2 on both/all your uplinks between the switches. Untagging should be solely for an end of line device. I would never untag VLANs between switches...

    5406_1 (Port A1 (if that's your uplink) tag VLAN 2)->5412 (Port A1-A2 (both your uplink ports) tag VLAN 2)->5406_2 (Port A1 (again if this is your uplink) tag VLAN 2) then untag VLAN 2 on as many ports as you need devices on 5406_2

  4. #4
    HMCTech's Avatar
    Join Date
    Apr 2008
    Thank Post
    Thanked 48 Times in 35 Posts
    Rep Power
    You do need to have both VLAN's tagged on yur link between switches.

  5. #5
    Butuz's Avatar
    Join Date
    Feb 2007
    Wales, UK
    Thank Post
    Thanked 220 Times in 176 Posts
    Rep Power
    If Vlan 1 is your Primary Vlan then by default all ports will be untagged on Vlan 1.

    You then untag ports on Vlan 2 that are going to be used for that vlan only.

    Then on Vlan 2 you tag the port(s) that are going to be uplinks to other switches.

    Do the same on each of your switches.

    You've now got your uplink ports able to carry traffic from both vlan 1 and vlan 2 whilst still keeping the vlans virtually seperate.

    Kinda like this:

    As you can see all curriculum ports are untagged on Vlan 1. All admin ports are untagged on vlan 2. All uplink ports are Untagged on Vlan 1 and Tagged on vlan 2.

    Attached Images Attached Images

+ Post New Thread

Similar Threads

  1. VLAN for Dummies?
    By reggiep in forum General Chat
    Replies: 44
    Last Post: 8th August 2010, 12:52 AM
  2. Procurve VLAN help
    By meastaugh1 in forum Wireless Networks
    Replies: 8
    Last Post: 4th September 2008, 09:29 PM
  3. To Vlan or not Vlan?
    By Theblacksheep in forum Wireless Networks
    Replies: 33
    Last Post: 19th August 2008, 04:22 PM
  4. VLAN Configuration
    By robknowles in forum Wireless Networks
    Replies: 1
    Last Post: 28th May 2008, 05:01 AM
  5. vlan and dhcp
    By Uraken in forum Wireless Networks
    Replies: 2
    Last Post: 17th March 2008, 12:18 PM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts