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SubjectKernel Routing Issues/Packett loss (argh.)
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<DIV><FONT face=Arial size=2>Ok... I've been pounding my head on my desk for the
last 12hrs. because of this:</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>I've been a subscriber to the cox@home cable modem
service for the last 9 months, problem-free.... I'm using a DEC Alpha running
Debian 2.1 and Kernel 2.2.14 for IP forwarding/masq. for my LAN...</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>I just moved to a new apartment, and I've gotten my
cable service transfered over to the new residence... I was given a different
cable modem (was using a Lancity model, now a surfboard sb1300), and a new set
of IPs for my host, subnet, etc.</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>So, I plugged in the new IPs to my
/etc/init.d/network script in Debian, re-ran it, and tried to ping an external
IP... 100% packet loss.&nbsp; Rebooted and tried pinging again, 100% packet
loss.... </FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>so I do...</FONT></DIV>
<DIV><FONT face=Arial size=2>
<DIV># ifconfig eth0 down</DIV>
<DIV><FONT face=Arial size=2># ifconfig eth0&nbsp;xx.xx.xxx.xx
netmask&nbsp;xxx.xxx.xxx.xxx broadcast xxx.xxx.xxx.xxx</FONT></DIV>
<DIV><FONT face=Arial size=2># route add default gw xx.xx.xxx.x netmask 0.0.0.0
metric 1 eth0</FONT></DIV>
<DIV>&nbsp;</DIV></FONT></DIV>
<DIV><FONT face=Arial size=2>Checked over my routing table, verified my
settings, etc... they all seem fine, but still 100% packet loss... while the
system is sending the packets out, the activity lights for the NIC blink, but
still, nothing comes back.</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>I figured it was time for a second opinion, so I
hooked the cable modem up to an i386 based system running Slackware 7.0 (Kernel
2.2.13)... edited my /etc/rc.d/rc.inet1 to reflect the changes to my IPs and
gateway, re-ran the script, and tried to ping... 100% packet loss...
rebooted.... 100% packet loss.</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>Tried it in windows, be it by hard-coding or DHCP,
everything is cool...&nbsp; bear in mind that all the while, both linux systems
work fine on my LAN.</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>Rather frustrated, I re-install Debian on the
Alpha... which, because it comes with it by default, is now running Kernel
2.0.36... same thing... this is even after inputing the network info into the
Debian setup program... 100% packet loss.</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>Even more frustrated, I start out a Slackware
install on a spare partition that I have on my workstation... I tell it to use
DHCP... upon booting up, dhcpcd times out waiting for the request to be
answered.&nbsp; So I hard code it.... 100% packet loss.</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>Alright, I'm last ditch now... I install RedHat 6.1
on the spart partition... it tries for DHCP... and times out.&nbsp; Because I'm
a glutton for punishment, I hardcode....</FONT></DIV>
<DIV><FONT face=Arial size=2>
<DIV>&nbsp;</DIV>
<DIV><FONT face=Arial size=2># ifconfig eth0&nbsp;xx.xx.xxx.xx
netmask&nbsp;xxx.xxx.xxx.xxx broadcast xxx.xxx.xxx.xxx</FONT></DIV>
<DIV><FONT face=Arial size=2># route add default gw xx.xx.xxx.x netmask 0.0.0.0
metric 1 eth0</FONT></DIV></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>and I ping............&nbsp;AND GET
REPYS,&nbsp;WITH 0% PACKET LOSS!??!?!</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>The only thing that I can see different here is the
kernel version between the 3 distros.... bear in minds, again, that on all
systems/installs,&nbsp;my LAN works fine, it's&nbsp;just thru the cable
modem&nbsp;that I&nbsp;have problems... I've flushed all IPCHAIN rules, etc., so
those aren't a problem, and the&nbsp;routing, etc., on the Slackware and
Debian&nbsp;installs match up exactly with redhat... but yet, redhat works, and
debian/slackware don't!&nbsp; (even more&nbsp;annoyingly, windows works too.)...
the only things that have changed from my old residence are:</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>IPs (IP address, subnet, gateway, netmask,
broadcast)</FONT></DIV>
<DIV><FONT face=Arial size=2>Cable Modem (went from a Lancity to a Surfboard
sb3100)</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>I suspect the cable modem, but NONE OF THIS MAKES
ANY SENCE TO ME!!!</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>I would really prefer running debian
as&nbsp;opposed to redhat, so if ANYONE has ANY suggestions, they would be MUCH
appreciated.</FONT>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>Thanks&nbsp;VERY much.....</FONT></DIV>
<DIV><FONT face=Arial size=2>Andrew Feldhacker</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>Technology is a word that describes something which
doesn't work yet.<BR>-Douglas Adams</FONT></DIV></BODY></HTML>
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N:Feldhacker;Andrew;J.
FN:Andrew J. Feldhacker
ORG:Mindspring Enterprises
TITLE:Technical Support Agent
ADR;WORK:;;;Phoenix;AZ
LABEL;WORK:Phoenix, AZ
ADR;HOME:;;;Phoenix;AZ
LABEL;HOME:Phoenix, AZ
X-WAB-GENDER:2
URL:http://feldh.home.mindspring.com/
URL:http://www.mindspring.net/
EMAIL;PREF;INTERNET:feldh@mindspring.net
REV:20000221T052853Z
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