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AC88U link aggregation and AiMesh wired backhaul

Discussion in 'Asuswrt-Merlin' started by Brian F, Jan 20, 2020.

  1. Brian F

    Brian F New Around Here

    Joined:
    Jan 19, 2020
    Messages:
    4
    Hi everyone,

    I have been trying to set things up (as per the attached LL design), but I was wondering if anybody can help maybe and stop me if I'm headed in the wrong direction.
    I'm struggling a bit to get the LACP to "talk" properly to my switch, but I might have started the wrong way and assumed that setting it Passive on the switch side will work. So last attempt will be to be to setup LACP Active on the switch side and see. But my other issue seems to be that AiMesh node communication is failing when going through the switch (no VLANs configured yet) , so I'm wondering if it's the LACP incorrect setup or will I need additional setup on the AC88U for LACP>>Switch in general, or maybe just if AiMesh wired backhaul is in place.
    I have seen a lot of people making use of the link aggregation to connect straight to a NAS, but my requirements are to maximize bandwidth and reliability given my wiring layout.
    And on a side note, is there a slight chance we will be able to see in future firmware releases, the ability to kill one radio frequency if a wired backhaul is in place?

    Many thanks,
    B
     

    Attached Files:

  2. JDB

    JDB Very Senior Member

    Joined:
    Aug 28, 2016
    Messages:
    973
    You need to enable the bond in the 88U as active. It’s in LAN>Switch Control I think.


    Sent from my iPhone using Tapatalk
     
  3. Brian F

    Brian F New Around Here

    Joined:
    Jan 19, 2020
    Messages:
    4
    Yeap, done that first thing.
    Thank you.
     
  4. Brian F

    Brian F New Around Here

    Joined:
    Jan 19, 2020
    Messages:
    4
    So let's forget the AiMesh topic from this discussion (at least for the moment) and focus on LACP.
    I have tried various ways to make my Cisco 2960-X talk LACP with my AC88U, but for the love of God, it just doesn't work.
    I'm frustrated as I've trolled the internet about setting it up and even troubleshoot this on my switch... but nothing matches my case...
    I just need the bare minimum config required for LACP to work, then I can start segregating into VLANs perhaps and other options but, I just need to see it working first.
    I'm sure I'm missing something to do with the config on the switch regarding the etherchannel or port-channel but I can't figure it out.
    On the Asus I've disabled the Jumbo frame and STP and left only Link Aggregation and NAT Acceleration enabled (attached screenshot)

    Anyone can share some switch configs maybe from your device so I can make this work, or am I supposed to follow an exact sequence of config/reboot/plug patch?
    I'm very short of pulling my hair out!

    Many thanks,
    B
     

    Attached Files:

  5. JDB

    JDB Very Senior Member

    Joined:
    Aug 28, 2016
    Messages:
    973
    I wonder if it’s as the Router and Switch are acting as the switch end of the equation. Most people have an end device like a NAS off of the Router/Switch.

    802.3ad is definitely supported switch-to-switch but per this post there are some limitations/changes need to be made to fully utilise it https://community.cisco.com/t5/swit...ch-to-switch-bandwidth-expecting/td-p/2902268


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  6. Brian F

    Brian F New Around Here

    Joined:
    Jan 19, 2020
    Messages:
    4
    I found something that can impact my LACP.

    It looks as though the Asus is sending Fast LACPDUs (1sec) whilst Cisco is sending Slow LACPDUs (30sec)

    The trouble is I wanted to force the Cisco into fast LACPDUs but the command doesn't seem to exist.
    Yes, I did try to apply the command only on Gi1/0/19 and Gi1/0/20 which are LACP enabled interfaces so should have worked.

    Cisco IOS Software, C2960X Software (C2960X-UNIVERSALK9-M), Version 15.2(2)E6, RELEASE SOFTWARE (fc1)


    Code:
    2960-X#show etherchannel 1 detail
    Group state = L2
    Ports: 2   Maxports = 16
    Port-channels: 1 Max Port-channels = 16
    Protocol:   LACP
    Minimum Links: 0
    
    
                    Ports in the group:
                    -------------------
    Port: Gi1/0/19
    ------------
    
    Port state    = Up Mstr Assoc Not-in-Bndl
    Channel group = 1           Mode = Active          Gcchange = -
    Port-channel  = Po1         GC   =   -             Pseudo port-channel = Po1
    Port index    = 0           Load = 0x00            Protocol =   LACP
    
    Flags:  S - Device is sending Slow LACPDUs   F - Device is sending fast LACPDUs.
            A - Device is in active mode.        P - Device is in passive mode.
    
    Local information:
                                LACP port     Admin     Oper    Port        Port
    Port      Flags   State     Priority      Key       Key     Number      State
    Gi1/0/19  SA      bndl      32768         0x1       0x1     0x114       0xD
    
    Partner's information:
    
                      LACP port                        Admin  Oper   Port    Port
    Port      Flags   Priority  Dev ID          Age    key    Key    Number  State
    Gi1/0/19  FA      1         3497.f621.1038   1s    0x0    0x0    0x3     0x7
    
    Age of the port in the current state: 0d:01h:11m:22s
    
    Port: Gi1/0/20
    ------------
    
    Port state    = Up Mstr Assoc In-Bndl
    Channel group = 1           Mode = Active          Gcchange = -
    Port-channel  = Po1         GC   =   -             Pseudo port-channel = Po1
    Port index    = 0           Load = 0x00            Protocol =   LACP
    
    Flags:  S - Device is sending Slow LACPDUs   F - Device is sending fast LACPDUs.
            A - Device is in active mode.        P - Device is in passive mode.
    
    Local information:
                                LACP port     Admin     Oper    Port        Port
    Port      Flags   State     Priority      Key       Key     Number      State
    Gi1/0/20  SA      bndl      32768         0x1       0x1     0x115       0x3D
    
    Partner's information:
    
                      LACP port                        Admin  Oper   Port    Port
    Port      Flags   Priority  Dev ID          Age    key    Key    Number  State
    Gi1/0/20  FA      1         3497.f621.1038  19s    0x0    0x0    0x2     0x3F
    
    Age of the port in the current state: 0d:01h:11m:24s
    
                    Port-channels in the group:
                    ---------------------------
    
    Port-channel: Po1    (Primary Aggregator)
    
    ------------
    
    Age of the Port-channel   = 0d:03h:23m:19s
    Logical slot/port   = 9/1          Number of ports = 2
    HotStandBy port = null
    Port state          = Port-channel Ag-Inuse
    Protocol            =   LACP
    Port security       = Disabled
    
    Ports in the Port-channel:
    
    Index   Load   Port     EC state        No of bits
    ------+------+------+------------------+-----------
      0     00     Gi1/0/19 Active             0
      0     00     Gi1/0/20 Active             0
    
    Time since last port bundled:    0d:01h:11m:22s    Gi1/0/19
    Time since last port Un-bundled: 0d:01h:11m:25s    Gi1/0/20
    
    C2960-X#