Slow download from LXC


Active Member
Aug 1, 2017

I set up a new Proxmox 5.4 cluster and doing some tests I noticed very slow download from LXC.

I tried a couple of different LXC with different IP and Debian version with same result.

I tried local disk and ceph disk.

From host I can wget at full speed (100M) From LXC wget starts at around 12M and after few seconds lowers to around 500K / 1 M.

Any troubleshooting suggestions?


did you try using different mac addresses too?

what's your network setup like?

no I did not try with different MAC, but I have many LXC with same behaviour.

What's the best way to get a new random MAC?

On other cluster hosts I get near 6 MB wget from same site but is still low.

ON host I have NIC 1Gb BCM5720

I use a bond with 2 NICS with public IP and bridge setup:

auto bond0
iface bond0 inet manual
    slaves eno1 eno3
    primary eno1
    bond_miimon 100
    bond_mode active-backup

auto vmbr0
iface vmbr0 inet static
    address x.92.x.1
    gateway x.92.x.254
    bridge_ports bond0
    bridge_stp off
    bridge_fd 0

LXC has IP x.92.x.8 and same gateway

Thank you.


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