[fyi] test in the wild (wg + gretap + batman-adv) on tplink842

[fyi] test in the wild (wg + gretap + batman-adv) on tplink842

[jens]

i have done some testing with nodes configured like the one in the wild
with a 842v3
(similar to Tplink-841 but with 8Mb Flash, i have difficulties to build
lede on the 841 - it is posible but extreme tricky, so for now i needed
a PoC of wireguard with gretap to use batman-adv routing protocol)

results are, with nearby all the packages we use in the wild for our 350
Node Meshnetwork.
link only      - 32 Mbit
on top wg0 - 26,7 Mbit
on top gretap and batman-adv (v14) - 14,8 Mbit.

lede - gluon with Wireguard 0.0.161223 kernel 4.4.36

i described it a bit more in detail here (sorry only in german)
https://forum.freifunk.net/t/erste-ernuechternde-lede-wireguard-gretap-er=
gebnisse-unter-livebedingungen/14057

so, just to let you know. thx and have some nice days
Jens

--=20
make the world nicer, please use PGP encryption

Re: [fyi] test in the wild (wg + gretap + batman-adv) on tplink842

[Jehan Tremback]

Maybe I'm missing something obvious, but why would batman-adv affect the
speed?

-- 
  Jehan Tremback
  jehan@altheamesh.com

On Fri, Dec 23, 2016, at 04:24 PM, jens wrote:
> i have done some testing with nodes configured like the one in the wild
> with a 842v3
> (similar to Tplink-841 but with 8Mb Flash, i have difficulties to build
> lede on the 841 - it is posible but extreme tricky, so for now i needed
> a PoC of wireguard with gretap to use batman-adv routing protocol)
> 
> results are, with nearby all the packages we use in the wild for our 350
> Node Meshnetwork.
> link only      - 32 Mbit
> on top wg0 - 26,7 Mbit
> on top gretap and batman-adv (v14) - 14,8 Mbit.
> 
> lede - gluon with Wireguard 0.0.161223 kernel 4.4.36
> 
> i described it a bit more in detail here (sorry only in german)
> https://forum.freifunk.net/t/erste-ernuechternde-lede-wireguard-gretap-ergebnisse-unter-livebedingungen/14057
> 
> so, just to let you know. thx and have some nice days
> Jens
> 
> -- 
> make the world nicer, please use PGP encryption
> 
> 
> _______________________________________________
> WireGuard mailing list
> WireGuard@lists.zx2c4.com
> https://lists.zx2c4.com/mailman/listinfo/wireguard

Re: [fyi] test in the wild (wg + gretap + batman-adv) on tplink842

[jens]

On 24.12.2016 17:35, Jehan Tremback wrote:
> Maybe I'm missing something obvious, but why would batman-adv affect th=
e
> speed?

not directly,

or i don't understand where your conclusion came from. batman-adv means
a lot of little batman-mesh-protocoll packets (namely ogm packets,
protocoll traffic is around 300 kbits in our network. which also will
travel over gretap/wireguard)

this scenario is equivalent to our free wifi network with 300++ nodes
and +-1000 users.
We use batman-adv as mesh protocol. While wireguard is layer 3 we need
to have layer2 over this tunnel.
so i tested wireguard + gretap + batman-adv   successfully.

compared to a other known layer2 crypted tunnel protocol (fastd) this is
3 times faster, which is mainly due to wireguard is a kernel-module and
fastd lay in userspace. (-> context switche)

i testet on weak devices, because this is what is deployed in big
numbers in our (and many other) Freifunk community.
also there are plenty of packets and stuff - so this explain the
relative low throughput. At least compared with clean linked test-setups.=


hope this explain my motivation and the reason why i test this in this
special scenario.

Jens/fuzzle

--=20
make the world nicer, please use PGP encryption

Re: [fyi] test in the wild (wg + gretap + batman-adv) on tplink842

[Jehan Tremback]

Got it, thanks.

-- 
  Jehan Tremback
  jehan@altheamesh.com

On Sat, Dec 24, 2016, at 08:14 PM, jens wrote:
> On 24.12.2016 17:35, Jehan Tremback wrote:
> > Maybe I'm missing something obvious, but why would batman-adv affect the
> > speed?
> 
> not directly,
> 
> or i don't understand where your conclusion came from. batman-adv means
> a lot of little batman-mesh-protocoll packets (namely ogm packets,
> protocoll traffic is around 300 kbits in our network. which also will
> travel over gretap/wireguard)
> 
> this scenario is equivalent to our free wifi network with 300++ nodes
> and +-1000 users.
> We use batman-adv as mesh protocol. While wireguard is layer 3 we need
> to have layer2 over this tunnel.
> so i tested wireguard + gretap + batman-adv   successfully.
> 
> compared to a other known layer2 crypted tunnel protocol (fastd) this is
> 3 times faster, which is mainly due to wireguard is a kernel-module and
> fastd lay in userspace. (-> context switche)
> 
> i testet on weak devices, because this is what is deployed in big
> numbers in our (and many other) Freifunk community.
> also there are plenty of packets and stuff - so this explain the
> relative low throughput. At least compared with clean linked test-setups.
> 
> hope this explain my motivation and the reason why i test this in this
> special scenario.
> 
> Jens/fuzzle
> 
> -- 
> make the world nicer, please use PGP encryption
> 
> 

Re: [fyi] test in the wild (wg + gretap + batman-adv) on tplink842

[Jason A. Donenfeld]

Hi Jens,

Great results; thanks for doing the measurements.

It's a shame that gretap&batman-adv have such a performance hit. Have
you been able to do any debugging to find out why this is?

Jason