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<DIV><FONT face=Arial size=2><SPAN class=263335823-24012006>HI
All,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=263335823-24012006>Our custom board is
based on PPC 8541 running Linux 2.6.11.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=263335823-24012006>We have NO
issue if FCC is operating in 100 Mbs. However, if we</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=263335823-24012006>configure the
interface in 10 Mbs we see the following behavior:</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=263335823-24012006><FONT size=2>If IPV6
is enabled, as soon as the FCC network interface is
plumbed</FONT></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=263335823-24012006><FONT size=2>through
"ifconfig" system call, </FONT></SPAN></FONT><FONT face=Arial size=2><SPAN
class=263335823-24012006><FONT size=2>we observe the CPU load increases to
90 percent </FONT></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=263335823-24012006><FONT size=2>and
most of the load is related to softirq process. A traceroute
command</FONT></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=263335823-24012006><FONT size=2>on the
interface displays an IPV6 multicast packet continuously getting
transmitted.</FONT></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=263335823-24012006>If we bring the
interface down through the ifconfig, we do not observe the
problem</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=263335823-24012006>no longer. The
strange thing is we do not observe this behavior if the
interface</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=263335823-24012006>is plumbed 100
Mbs.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=263335823-24012006></SPAN></FONT><FONT
face=Arial size=2><SPAN class=263335823-24012006><FONT size=2>We need to root
cause this and have no idea what to look for, any idea
greatly</FONT></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=263335823-24012006><FONT
size=2>appreciated.</FONT></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=263335823-24012006><FONT
size=2></FONT></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=263335823-24012006><FONT size=2>Many
thanks in advance,</FONT></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=263335823-24012006><FONT
size=2>Bizhan</DIV></FONT></SPAN></FONT></BODY></HTML>