[RP-PPPoE] lowering pppoe cpu usage

[Paul Young]

Hi,

I'm not that great with rp-pppoe but here goes.

You can try run rp-pppoe in kernel mode. For myself that included these changes:

for the ppp config (ifcfg-ppp0 for example) I added this line:

LINUX_PLUGIN=/usr/lib64/pppd/2.4.5/rp-pppoe.so

In Kernel mode though your CLAMPMSS setting is no longer in play so in
iptables I also added this rule:

-A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS  --clamp-mss-to-pmtu

I am using rp-pppoe-3.10-10.el6.x86_64

On 13 November 2014 09:15, Horatiu N <horatiu at ddhosted.com> wrote:
> Hello,
> Is it possible to lower pppoe's cpu usage ?
> On an old router that previously did fine, after switching to a pppoe ISP
> the cpu can't cope (well, it'a pentium III 850mhz but still).
> Router runs linux centos 6.5 32bit
> package version is rp-pppoe-3.10-11.el6.i686
> Is there anything that can be done ?
> In theory i have 100mbit but because of this cpu bottleneck i can only use
> 60 or so untill /usr/sbin/pppoe 100% fills cpu.
>
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