CentOS - Oct 2017 - Weird bandwith behaviour (download throughput) on CentOS based gateway

Hi.

I have a company gateway that is connected to a 30/30 Fiber connection, network
termination point is a MRV OS-904.
It acts as a firewall/router for the DMZ/hosts/lans behind.

Software: CentOS 6.9, bare minimum install, all latest patches.
Hardware: Xeon CPU, Intel server MB with two Intel PRO 1000 (e1000, e1000e)
network cards, adaptec RAID, 8GB RAM


On the hosts/lan behind I can happily achieve 28.8 mbs - it seems it's being
capped at that speed by the provider.

However, on the host itself I cannot get passed 820k/s max, even if I switch off
iptables and anything else that could interfere with the download/upload
bandwidth.


I have no idea why this is the case - It only matters when I need to "yum
update" as the updates take 4 times longer than on the CentOS DMZ hosts
behind it - but yes, its rather annoying!


Where do I need to look?
What am I missing?


Jobst






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on a web site, and you must change them very often.

  | |0| |   Jobst Schmalenbach, General Manager
  | | |0|   Barrett & Sales Essentials
  |0|0|0|   +61 3 9533 0000, POBox 277, Caulfield South, 3162, Australia

On Thu, Oct 5, 2017 at 2:41 PM, Jobst Schmalenbach <jobst at
barrett.com.au>
wrote:
>
> Hi.
>
> I have a company gateway that is connected to a 30/30 Fiber connection,
> network termination point is a MRV OS-904.
> It acts as a firewall/router for the DMZ/hosts/lans behind.
>
> Software: CentOS 6.9, bare minimum install, all latest patches.
> Hardware: Xeon CPU, Intel server MB with two Intel PRO 1000 (e1000,
> e1000e) network cards, adaptec RAID, 8GB RAM
>
>
> On the hosts/lan behind I can happily achieve 28.8 mbs - it seems it's
> being capped at that speed by the provider.
>
> However, on the host itself I cannot get passed 820k/s max, even if I
> switch off iptables and anything else that could interfere with the
> download/upload bandwidth.
>
>
> I have no idea why this is the case - It only matters when I need to
"yum
> update" as the updates take 4 times longer than on the CentOS DMZ
hosts
> behind it - but yes, its rather annoying!
>
>
> Where do I need to look?
> What am I missing?
>
>
>
>
Hi,

Are you sure  that your issue  isn't related to the mirror that your
systems are selecting ?  If they are using different mirrors I would try
using the fastestmirror plugin to make the gateway select the same mirror
as you other host.

On Thu, Oct 05, 2017 at 02:57:18PM +1300, Clint Dilks (clintd at
scms.waikato.ac.nz) wrote:
> On Thu, Oct 5, 2017 at 2:41 PM, Jobst Schmalenbach <jobst at
barrett.com.au>
> wrote:
> [snip]
> Hi,
> 
> Are you sure  that your issue  isn't related to the mirror that your
> systems are selecting ?  If they are using different mirrors I would try
> using the fastestmirror plugin to make the gateway select the same mirror
> as you other host.
Darn!!!!

I should have included in the initial email that I actually ran EXTRA tests from
a {local} CentOS mirror using wget after I figured there was some differences in
the "yum update" times ...

The Gateway:

  [root at GATEWAY /tmp] #>wget
http://mirror.internode.on.net/pub/centos/6.9/isos/x86_64/CentOS-6.9-x86_64-bin-DVD1.iso
  --2017-10-05 14:59:55-- 
http://mirror.internode.on.net/pub/centos/6.9/isos/x86_64/CentOS-6.9-x86_64-bin-DVD1.iso
  Resolving mirror.internode.on.net... 150.101.135.3
  Connecting to mirror.internode.on.net|150.101.135.3|:80... connected.
  HTTP request sent, awaiting response... 200 OK
  Length: 3972005888 (3.7G) [application/octet-stream]
  Saving to: ???CentOS-6.9-x86_64-bin-DVD1.iso???
  0% [                                                                          
] 4,454,198    680K/s

One of the hosts behind it:

  [root at piquet /tmp] #>wget
http://mirror.internode.on.net/pub/centos/6.9/isos/x86_64/CentOS-6.9-x86_64-bin-DVD1.iso
  --2017-10-05 15:01:32-- 
http://mirror.internode.on.net/pub/centos/6.9/isos/x86_64/CentOS-6.9-x86_64-bin-DVD1.iso
  Resolving mirror.internode.on.net... 150.101.135.3
  Connecting to mirror.internode.on.net|150.101.135.3|:80... connected.
  HTTP request sent, awaiting response... 200 OK
  Length: 3972005888 (3.7G) [application/octet-stream]
  Saving to: `CentOS-6.9-x86_64-bin-DVD1.iso'
  0% [                                                                          
] 13,616,730  2.4M/s


Jobst


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  | |0| |   Jobst Schmalenbach, General Manager
  | | |0|   Barrett & Sales Essentials
  |0|0|0|   +61 3 9533 0000, POBox 277, Caulfield South, 3162, Australia