On Tue, 30 Jun 2015, Mikael Abrahamsson wrote:
On Tue, 30 Jun 2015, [email protected] wrote:
What happens if the SoC ports aren't saturated, but the link is GigE? That
is, suppose this is an access link to a GigE home or office LAN with wired
servers?
As far as I can tell, the device looks like this:
wifi2------
wifi1----\|
SOC2 6-|
SOC1 5-|
WAN 4-|
LAN1 3-| (switch)
LAN2 2-|
LAN3 1-|
LAN4 0-|
LAN1-4 and SOC2 is in one vlan, and SOC1 and WAN is in a second vlan. This
basically means there is no way to get traffic into SOC1 that goes out SOC2
that will saturate either port, because they're both gige. Only way to
saturate the SOC port would be if the SOC itself "created" traffic, for
instance by being a fileserver, or if there is significant traffic on the
wifi (which has PCI-E connectivity).
So it's impossible to congest SOC1 or SOC2 (egress) by running traffic
LAN<->WAN alone.
not true, the switch doesn't give any way for traffic to get from one vlan to
the other one, so if you have gig-e connections on both sides, the traffic going
from one to the other will have to go through the soc, so if there is more than
1Gb of traffic in either direction the interface will be saturated.
The problem is if you have a slower connection, the bottleneck is in the switch
not the soc. you may be able to set the soc-switch interface to 100Mb (make sure
you have access through another interface in case you cut yourself off) and that
would make the soc see the queue directly.
David Lang
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