I've got an issue with a DrayTek 2820Vn modem/router on my Sun Ultra 60. 
Basically, they don't like either other too much. It causes the DrayTek 
to be very slow - downloads from the internet occur at 1 KB/s or less.

DrayTek have suggested I might need to send them Etheral Traces to 
further investigate the cause of problem.

I believe I can use snoop for this, but if I use the -o option to save 
data to a file, I assume it will be in big-endian format and so will not 
be readable on a little-endian machine. Is that a correction assumption?

If it is correct, is there any way I could send DrayTek information 
which might diagnose the problem in a way they could use on a x86 
machine, which I assume they will more likely have.


-- 
I respectfully request that this message is not archived by companies as
unscrupulous as 'Experts Exchange' . In case you are unaware,
'Experts Exchange'  take questions posted on the web and try to find
idiots stupid enough to pay for the answers, which were posted freely
by others. They are leeches.

Dave <foo@coo.com> writes:

> I've got an issue with a DrayTek 2820Vn modem/router on my Sun Ultra
> 60. Basically, they don't like either other too much. It causes the
> DrayTek to be very slow - downloads from the internet occur at 1 KB/s
> or less.
>
> DrayTek have suggested I might need to send them Etheral Traces to
> further investigate the cause of problem.
>
> I believe I can use snoop for this, but if I use the -o option to save
> data to a file, I assume it will be in big-endian format and so will
> not be readable on a little-endian machine. Is that a correction
> assumption?

No, the capture file is RFC 1761-compliant. It can be read on any
system that can read them.

See "man snoop"

Thomas

Thomas Tornblom <thomas@Hax.SE> writes:
>Dave <foo@coo.com> writes:

>> I've got an issue with a DrayTek 2820Vn modem/router on my Sun Ultra
>> 60. Basically, they don't like either other too much. It causes the
>> DrayTek to be very slow - downloads from the internet occur at 1 KB/s
>> or less.
>>
>> DrayTek have suggested I might need to send them Etheral Traces to
>> further investigate the cause of problem.
>>
>> I believe I can use snoop for this, but if I use the -o option to save
>> data to a file, I assume it will be in big-endian format and so will
>> not be readable on a little-endian machine. Is that a correction
>> assumption?

>No, the capture file is RFC 1761-compliant. It can be read on any
>system that can read them.


And if they can't read snoop files (Etheral/Wireshark can load them
directly), you can convert them to pcap format with editcap out of the
Wireshark distribution. 

On Apr 17, 1:02=A0am, Dave <f...@coo.com> wrote:
> I've got an issue with a DrayTek 2820Vn modem/router on my Sun Ultra 60.
> Basically, they don't like either other too much. It causes the DrayTek
> to be very slow - downloads from the internet occur at 1 KB/s or less.
>
> DrayTek have suggested I might need to send them Etheral Traces to
> further investigate the cause of problem.
>
> I believe I can use snoop for this, but if I use the -o option to save
> data to a file, I assume it will be in big-endian format and so will not
> be readable on a little-endian machine. Is that a correction assumption?
>
> If it is correct, is there any way I could send DrayTek information
> which might diagnose the problem in a way they could use on a x86
> machine, which I assume they will more likely have.

Slow downloads can be caused by differences in ethernet configurations
between router and Ultra60. Draytek has gigabit ethernet port while
Ultra60 has hme card (10/100). Have you connected router directly to
Ultra60 or via switch? I would try to play with ndd on Ultra60 (http://
docs.sun.com/app/docs/doc/805-4449/6j47dm3ik?l=3Dko&a=3Dview) and also
with ethernet port settings on DrayTek (enable/disable
autonegotiation, make sure duplex setting are the same, try different
speeds).

Art Okunev wrote:

> Slow downloads can be caused by differences in ethernet configurations
> between router and Ultra60. Draytek has gigabit ethernet port while
> Ultra60 has hme card (10/100). Have you connected router directly to
> Ultra60 or via switch? I would try to play with ndd on Ultra60 (http://
> docs.sun.com/app/docs/doc/805-4449/6j47dm3ik?l=ko&a=view) and also
> with ethernet port settings on DrayTek (enable/disable
> autonegotiation, make sure duplex setting are the same, try different
> speeds).

The DrayTek has one 1 Git connector and 3 x 100 Mbit. I've tried the U60 
both in the DrayTek directly and on a Gbit switch connected to the 
DrayTek. It does not appear to make any difference.

I've tried both with and without a switch in place. AT one point I cam 
to the conclusion it was better with the switch, but it's hard to be 
sure of this, as the problem is intermittent.

The U60 has a web server on it. I'm am now wondering if this slows the 
internet access to a crawl (about 1 KB/s) when someone is downloading a 
file from the web server. The line is a 2 Mbit/256 Kbit, but perhaps 
some upload capability is needed to download a file, and the web server 
uses it all.

I've tried enabling the download limit to see if that works. The fact it 
appeared more reliable with the switch makes me think this is not the 
case, but since it is intermittent, it is hard to be conclusive about 
what works best. But I'm now suspect it is a upload bandwidth limit, as 
the problem stopped when I stopped the apache server. But as I say, it 
has been intermittent.

I only enable the DrayTek's bandwidth limiting feature an hour or so 
ago, so I've no idea yet if the problem has gone or not.


-- 
I respectfully request that this message is not archived by companies as
unscrupulous as 'Experts Exchange' . In case you are unaware,
'Experts Exchange'  take questions posted on the web and try to find
idiots stupid enough to pay for the answers, which were posted freely
by others. They are leeches.

Dave <foo@coo.com> wrote:
> I've got an issue with a DrayTek 2820Vn modem/router on my Sun Ultra 60. 
> Basically, they don't like either other too much. It causes the DrayTek 
> to be very slow - downloads from the internet occur at 1 KB/s or less.

On the Ultra 60 check the number of Ierrs and Oerrs you get with 
'netstat -i'. If it's more than zero you most likely have problems with
duplex settings.

Sami

-- 
  .signature: no such file or directory