Groups > linux.debian.user > #200930

dual port cross over cable bonding

From	Adam Weremczuk <adamw@matrixscience.com>
Newsgroups	linux.debian.user
Subject	dual port cross over cable bonding
Date	2018-10-05 16:40 +0200
Message-ID	<wFzqN-2E2-1@gated-at.bofh.it> (permalink)
Organization	Matrix Science Ltd

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Hello,

I have 2 servers running Proxmox 5.2 (based on Debian 9).

I've connected Ethernet ports between them with a pair of cross over cables.

When only 1 port on each and 1 cable are used connectivity looks fine 
with the following config:

-------------------------------------------------------

auto ens1f0
iface ens1f0 inet static
     address 192.168.200.1(2)
     netmask 255.255.255.252

-------------------------------------------------------

Then I connected 2 cables and attempted link aggregation:

-------------------------------------------------------

iface ens1f0 inet manual

iface ens1f1 inet manual

auto bond1
iface bond1 inet static
     slaves ens1f0 ens1f1
     address 192.168.200.1(2)
     netmask 255.255.255.252
     bond_miimon 100
#    bond_mode 802.3ad
     bond_mode balance-rr
     bond_xmit_hash_policy layer3+4

-------------------------------------------------------

Tried both 802.3ad and balance-rr modes.

AFAIK only these 2 provide link aggregation.

Ethtool appears to be happy:

ethtool bond1
Settings for bond1:
     Supported ports: [ ]
     Supported link modes:   Not reported
     Supported pause frame use: No
     Supports auto-negotiation: No
     Advertised link modes:  Not reported
     Advertised pause frame use: No
     Advertised auto-negotiation: No
     Speed: 2000Mb/s
     Duplex: Full
     Port: Other
     PHYAD: 0
     Transceiver: internal
     Auto-negotiation: off
     Link detected: yes

Unfortunately in either mode cross pinging fails with "Destination Host 
Unreachable".

Own interfaces ping ok.

The same configuration works fine against managed switch ports (LACP/LAG).

So my question is why this is not working and whether it's possible at all?

Regards,
Adam

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Thread

dual port cross over cable bonding Adam Weremczuk <adamw@matrixscience.com> - 2018-10-05 16:40 +0200
  Re: dual port cross over cable bonding Dan Ritter <dsr@randomstring.org> - 2018-10-05 16:50 +0200
    Re: dual port cross over cable bonding Dan Ritter <dsr@randomstring.org> - 2018-10-05 16:50 +0200
      [SOLVED] Re: dual port cross over cable bonding Adam Weremczuk <adamw@matrixscience.com> - 2018-10-05 17:20 +0200
  Re: dual port cross over cable bonding Dan Ritter <dsr@randomstring.org> - 2018-10-05 16:50 +0200
    Re: dual port cross over cable bonding Adam Weremczuk <adamw@matrixscience.com> - 2018-10-05 17:10 +0200
  Re: dual port cross over cable bonding Reco <recoverym4n@enotuniq.net> - 2018-10-05 17:20 +0200
  Re: dual port cross over cable bonding Dan Purgert <dan@djph.net> - 2018-10-05 17:20 +0200
    [SOLVED] Re: dual port cross over cable bonding Adam Weremczuk <adamw@matrixscience.com> - 2018-10-05 17:50 +0200

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