Single VLAN existing on Multipule interfaces?



  • Ok so heres the scoop.

    I have 2 Cisco 2950's (i know old, please don't laugh. They were free and they work  :)) I have all my VLANs configured on both switches [7,10,11,37,100]. I also have these VLANs defined on my PFSense router (Stephew10 FTW on my firebox]. I have this setup working fine with one switch and a single 2 port LAGG.

    I'd like to take my second switch, setup a second LAGG on the router, then also have all of my VLANs exists on both interfaces so that all VLANs can be accessed and used on both switches.

    I've done a bit of research, but I cannot find if anyone has even done something like this… Is this even possible?

    Thanks,


  • LAYER 8 Netgate

    Use switch trunk ports to trunk VLANs between switches, not router ports.



  • I know i can get a working configuration, with all my VLans existing on all switches, by doing the following:

    Router - msk2,msk3 - LACP Lagged Trunk
      |
      |–- Switch 1 [Ports 23/24 Connected to msk2,msk3 on the router, and ports 21/22 to extend the LAGG to another switch]
                |
                |–- Switch 2 [Ports 23/24 connected to 21/22 on switch 1]

    However the configuration I'm looking for is as follows:

    Router [msk0.msk1 - LAGG1] [msk2,msk3 - LAGG0] both LACP Trunks
                    |                                            |
                    |–- Switch 1                        |--- Switch 2

    And still have my Vlans exist on both switches....

    Or can I create a single 4 port LAGG [msk0-3] and connect 2 ports of the LAGG to each switch? ie:

    Router [msk0-3] LACP LAGG
          |        |
          |        |–-Switch 2 [ports 23/24 connected to msk2/3]
          |–-Switch 1 [ports 23/24 connected to msk0/1]

    or am what I am asking simply impossible?


  • LAYER 8 Netgate

    Router [msk0.msk1 - LAGG1] [msk2,msk3 - LAGG0] both LACP Trunks
                    |                                            |
                    |–- Switch 1                        |--- Switch 2

    Why on Earth would you want to do that?  Use a switch.



  • A router is not a switch. Bridging interfaces tries to make it a switch but never succeeds.
    This has been discussed in all possible (and quite some impossible) configurations already.


Log in to reply