3-Line MLPPP DSL on BSD - MTU/MRRU/MRU??

[Carrick, David]

Hi Guys,

I have posted this question in a few different forums but I have not had much luck with a response and I'm hoping someone can help me out. I recently upgraded to a triple-5meg DSL service setup with MLPPP here in Ontario Canada through a provider called Teksavvy. I chose FreeBSD as my o/s of choice and I'm using MPD5.5 to bond the connections. I believe they are using Juniper equipment on their end, not sure if it matters.

I have been using Linux for 15 years, and am an AIX Infrastructure Analyst by trade, but I am not very familiar with more advanced networking terms and technologies, and I am pretty new to FreeBSD.

I was wondering if someone could help me with the optimal values for my mpd.conf file - Max Transmit units, Max recieve unit, all that stuff. Here is what I've got going so far... Please note I am not on the freebsd-net mailing list so if you could CC me on the responses that would be great!

default:

load DSL

DSL:
create bundle static B1
set iface route default
set ipcp ranges 0.0.0.0/0 0.0.0.0/0
set ipcp enable req-pri-dns
set ipcp enable req-sec-dns
set ipcp disable vjcomp

set bundle disable round-robin
set bundle disable bw-manage
set bundle links L1 L2 L3
set iface mtu 1492
set iface disable on-demand
set iface enable tcpmssfix
create link static L1 pppoe
set auth authname xxx at wiredhighspeed.com
set auth password xxx
set link max-redial 0
set link keep-alive 10 60
set pppoe iface fxp1
set pppoe service "teksavvy"
set link enable multilink
set link enable shortseq
set link disable protocomp
set link mrru 1500
# set link mru 1500
set link mtu 1492
set link bandwidth 5056000
set link action bundle B1
open

create link static L2 pppoe
set auth authname xxx at wiredhighspeed.com
set auth password xxx
set link max-redial 0
set link keep-alive 10 60
set pppoe iface fxp2
set pppoe service "teksavvy"
set link enable multilink
set link enable shortseq
set link disable protocomp
set link mrru 1500
# set link mru 1500
set link mtu 1492
set link bandwidth 5056000
set link action bundle B1
open

create link static L3 pppoe
set auth authname xxx at wiredhighspeed.com
set auth password xxx
set link max-redial 0
set link keep-alive 10 60
set pppoe iface fxp3
set pppoe service "teksavvy"
set link enable multilink
set link enable shortseq
set link disable protocomp
set link mrru 1500
# set link mru 1500
set link mtu 1492
set link bandwidth 5056000
set link action bundle B1
open

----

I can't really recall why I commented the MRU values - I think they defaulted to 1500 anyway. I adapted the config from a fast 2 Line setup posted in another forum around here. When I tested it as two lines, it was definitely "as fast as it could go". Not as impressed with the 3 line setup.

Any advice or direction on this would be greatly appreciated.

Thanks

David Carrick
Senior AIX Infrastructure Analyst
AIX Services | Spectra Energy
519.436.4600 x2464 (desk)
800.571.8446 x2464 (toll free)
519.437.7194 (cell)
dcarrick at uniongas.com<mailto:dcarrick at uniongas.com>
For first call resolution please contact the Spectra Energy Enterprise IT Help Desk @ local 4444 or toll free @ 1-866-252-8881