Subject:  FTP speed becomes slow with PPPoE & speed is fine without PPPoE |
Author:
C Balaji
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Date Posted: 03:13:41 2006-02-23 Thu
Author Host/IP: 203.200.200.70
Hello,
The FTP becomes slow with PPPoE connection between
a linux PC running rp-pppoe client and another linux pc running rp-pppoe server.
With the same setup without PPPoE the speed is good.
Scenario 1 : Direct connection, back-to-back LAN.
2MB files takes 0.03 seconds for FTP
on 10Mbps ethernet link.
============ LAN1 LAN1 ==========
Linux PC |-------------------| Linux PC
| |
============ ==========
Scenario 2 : PPPoE connection between PCs.
2MB files takes 10.7 seconds for FTP
on 10Mbps ethernet link.
============ LAN1 LAN1 ==========
Linux PC |-------------------| Linux PC
rp-pppoe client | |rp-pppoe server
============ ==========
Setup details :
Usermode RP-PPPoE version 3.5
pppd version 2.4.2
linux version 2.4.22
MSS = 1412 bytes (tried 1000 bytes)
MTU = 1500 bytes (tried other values like 1000, 512)
PPPoE is invoked as
/usr/sbin/pppd pty "/usr/sbin/pppoe" \
file "$PPPD_OPTIONS" \
debug > /var/log/pppoe.log &
and contents of PPPD_OPTIONS file is as follows
#########################################
nodetach
plugin /nn/lib/gap_ppp_plugin.so
refuse-chap
refuse-mschap
refuse-mschap-v2
crtscts
debug
lock
noipdefault
ipcp-accept-local
idle 120
asyncmap 0
bsdcomp 0
mtu 1500
mru 1500
name nnadmin
novj
lcp-max-configure 10
lcp-max-terminate 3
lcp-max-failure 10
lcp-echo-failure 2
lcp-echo-interval 15
nopersist
############################################################
Please share your thoughts and experiences
Thanks
-c balaji
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