ExtremeSwitching (EXOS)

 View Only
Expand all | Collapse all

Extreme equivalent of trunking

  • 1.  Extreme equivalent of trunking

    Posted 03-31-2016 10:28
    I am having difficulty understanding how multiple vlans are transported between extreme switches (not stacked) and how they are physically cabled. With cisco i create two trunk ports directly connected between switches and pass multiple vlans between these switches on the connected trunk ports or lags. How is this physically performed with extreme. What i see in the extreme documentation is tagging, but I find nothing pertaining to how these tags are assembled on a trunk like port and passed amongst switches...


  • 2.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 10:43
    On Extreme you simply add all the vlans you want as tagged on the ports that link the switches, there is no special configuration required.

    Just in case:
    add vlan20 port 1:53 tagged

    Hope that helps


  • 3.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 10:46
    Hi Brian,

    When a packet egress a tagged port through let's say vlan tag 10 then the ethernet frame is increased by 4 bytes which includes the 802.1a tag/ID 10. The other side port must be also tagged for vlan 10 so it can check the ethernet frame 802.1q value (10 in this case) and then assign the traffic to the correct vlan (vlan 10).

    Example:

    PC1 port 1 ==== SW1 port 5 ================ port 5 SW2 port 1 ==== PC2

    Vlans:

    Sw1: Sw2:
    vlan_10 tag 10 vlan_10 tag 10
    vlan_20 tag 20 vlan_20 tag 20
    vlan_30 tag 30 vlan_30 tag 30

    Configuration for both switches:

    create vlan vlan_10 tag 10
    create vlan vlan_20 tag 20
    create vlan vlan_30 tag 30

    configure vlan vlan_10 add port 5 tagged
    configure vlan vlan_20 add port 5 tagged
    configure vlan vlan_30 add port 5 tagged

    configure vlan vlan_10 add port 1 untagged
    configure vlan vlan_20 add port 1 untagged
    configure vlan vlan_30 add port 1 untagged

    Based on the above example the following is true:
    • When a packet egress Sw1 port 5 through vlan_30, the packet will have 802.1q tagged frame (ID 30) included. When the packet ingress Sw2 port 5 it will read the ethernet frame 802.1q ID 30 and assign vlan_30 to it. When the packet egress port 1 (untagged) it will strip the 802.1q tagged frame (4 bytes) and then PC2 will be able to read the packet
    • Same behavior will happen when the packet egress/ingress from/to the other vlans (10 and 20)


  • 4.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 10:46
    you meant

    config vlan vlan_10 add port 5 tagged, etc.

    With 16.1 and later, you can also do :

    config vlan 10,20,30 add port 5 tagged


  • 5.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 10:46
    Good catch :)
    I updated Henrique's post (with his permission).


  • 6.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 11:28
    thanks for the speedy replies... it is a different paradigm than what i'm used to...


  • 7.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 11:28
    Brian, you may want to take a look at the EXOS Quick Guide.
    There's also an "EXOS Cheat Sheet" that someone has put together.


  • 8.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 11:28
    yes, i just finished reading the quick guide.. i'll take a look at the cheat sheet...also looking at the user guide which the quick guide references as most useful... any other suggested reading sources are welcome... thank you


  • 9.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 11:28
    Here's a thread that you may find helpful: Extreme Networks Self-Paced Training
    Also, welcome to The Hub!


  • 10.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 11:28
    thank you...



  • 11.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 11:28
    yes, i've already done those... are there any more like that?


  • 12.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 11:28
    or more like that, but in pdf's?


  • 13.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 11:28
    Those are the only ones I'm aware of, but that doesn't mean there isn't more.
    If it exists, it should be here: http://www.extremenetworks.com/education


  • 14.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 11:28
    most everything else is classroom stuff... there must be some extreme blogs in the wild... i'll go hunting... if you bump into anything please let me know...

    thanks a million...


  • 15.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 17:17
    The way cisco does it is, you set a port as a trunk and ALL vlans will egress that trunk port. If you want to restrict the vlans that egress that trunk, you explicitly deny that to pass through the trunk with filtering. Extreme / Enterasys and most everyone else... you simply just add each vlan to the port by tagging it.

    So for enterasys:

    set vlan egree 2,3,4,5,6,7,8,9,10 ge.1.1 tagged

    That would be similar to

    switchport encap dot1q
    switchport mode trunk

    On the cisco side, I would have to chop off vlan 4 and 5 from being egressed if I didn't want them to go over the trunk, everyone else you just simply don't include those vlans when tagging them on the port.

    That being said, you need to be sure to tag the vlans on the uplinks and everyone inbetween. Cisco makes it easy, but it is less secure by default.


  • 16.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 17:17
    Likewise, on Extreme you create a vlan:

    create vlan Classroom102 tag 102
    configure Classroom102 add ports 1-48 untagged
    configure Classroom102 add ports 52 tagged

    Sadly, I don't think there is a faster way to do it with Extreme. The naming of vlans is cool, but it would be nice to be able to tag multiple vlans on a port at once.

    But you get the idea.


  • 17.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 17:17
    yeah, i'm coming around to it... i prefer the cisco way, but it is what it is...


  • 18.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 17:17
    You may have missed my comment above. With 16.1 and later, you can do :

    config vlan 10,20,30 add port 5 tagged


  • 19.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 17:17
    oh not at all, i saw that... i like that a lot better, and thank you...


  • 20.  RE: Extreme equivalent of trunking

    Posted 03-31-2016 17:17
    Oh thank god!


  • 21.  RE: Extreme equivalent of trunking

    Posted 03-04-2018 18:22

    Hi. I am configuring an enterasys sw and I have a communication problem between computers. create a vlan 10 with ip 10.10.1.1 and mask 255.255.2355.0, the vlan I put it to two ports of the sw and I have 254 ip to make tests with computers, to 2 computers I put ip's of that segement, the test that I do it with a ping but it tells me that the host is unreachable. Could you please help me. Thank you


  • 22.  RE: Extreme equivalent of trunking

    Posted 03-04-2018 18:22
    what switch model is it?


  • 23.  RE: Extreme equivalent of trunking

    Posted 03-04-2018 18:22
    the model is Enterasys B3G124-48


  • 24.  RE: Extreme equivalent of trunking

    Posted 03-04-2018 18:22
    could you please provide the output of "show vlan portinfo port ge.1.x" for both of the ports with the clients connected.


  • 25.  RE: Extreme equivalent of trunking

    Posted 03-04-2018 18:22
    Ok,



  • 26.  RE: Extreme equivalent of trunking

    Posted 03-04-2018 18:22
    ... and what's the output in the router mode/section for "show interface vlan 10"
    Could it be that it's still shutdown ?


  • 27.  RE: Extreme equivalent of trunking

    Posted 03-04-2018 18:22




  • 28.  RE: Extreme equivalent of trunking

    Posted 03-04-2018 18:22
    no, please do....

    #router
    #show interface vlan 10


  • 29.  RE: Extreme equivalent of trunking

    Posted 03-04-2018 18:22