| Author |
Message |
AnthonyL
Guest
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 Posted:
Thu Apr 21, 2005 4:20 pm Post subject:
Re: Switch to switch causing traffic problems? |
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On 20 Apr 2005 08:42:25 -0400, adykes@panix.com (Al Dykes) wrote:
| Quote: | In article <42663bed.10009162@news.zen.co.uk>,
AnthonyL <nospam@please.invalid> wrote:
On Tue, 19 Apr 2005 08:19:29 -0400, "J. Clarke"
jclarke.usenet@snet.net.invalid> wrote:
Please make your responses more readable.
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Never had that complaint before. Is it because you replied to my
reply to J. Clarke and not my reply to you which I thought was
reasonably sensibly snipped in the context of your comments? :)
--
AnthonyL |
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AnthonyL
Guest
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| Posted:
Fri Apr 22, 2005 2:21 pm Post subject:
Re: Switch to switch causing traffic problems? |
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On 21 Apr 2005 09:37:02 -0400, adykes@panix.com (Al Dykes) wrote:
| Quote: |
Do a netstat -e on all your boxes. If the error counters are zero or
single digits you don't have a cable problem. If they are higher you
may have a cable problem or something else but you'll have narrowed
down the problem.
|
Results as below for netstat -e -s
Would you agree they seem ok?
Interface Statistics
Received Sent
Bytes 54984005 9219268
Unicast packets 58290 45282
Non-unicast packets 4144 561
Discards 0 0
Errors 0 0
Unknown protocols 3912
IPv4 Statistics
Packets Received = 61189
Received Header Errors = 0
Received Address Errors = 254
Datagrams Forwarded = 0
Unknown Protocols Received = 0
Received Packets Discarded = 9
Received Packets Delivered = 61177
Output Requests = 45799
Routing Discards = 0
Discarded Output Packets = 0
Output Packet No Route = 0
Reassembly Required = 0
Reassembly Successful = 0
Reassembly Failures = 0
Datagrams Successfully Fragmented = 0
Datagrams Failing Fragmentation = 0
Fragments Created = 0
ICMPv4 Statistics
Received Sent
Messages 83 80
Errors 0 0
Destination Unreachable 1 1
Time Exceeded 3 0
Parameter Problems 0 0
Source Quenches 0 0
Redirects 0 0
Echos 8 71
Echo Replies 71 8
Timestamps 0 0
Timestamp Replies 0 0
Address Masks 0 0
Address Mask Replies 0 0
TCP Statistics for IPv4
Active Opens = 65
Passive Opens = 5
Failed Connection Attempts = 11
Reset Connections = 2
Current Connections = 4
Segments Received = 58122
Segments Sent = 45013
Segments Retransmitted = 86
UDP Statistics for IPv4
Datagrams Received = 2376
No Ports = 1222
Receive Errors = 39
Datagrams Sent = 616
--
AnthonyL |
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AnthonyL
Guest
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| Posted:
Fri Apr 22, 2005 2:34 pm Post subject:
Re: Switch to switch causing traffic problems? |
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On 21 Apr 2005 10:46:08 -0400, adykes@panix.com (Al Dykes) wrote:
| Quote: | IMO the back-to-back noname switches may be a problem with the IPX
broadcasts. This can be proved by moving a problametic PC to site2
and hooking ot up to the local LAN. I
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Is it primarily the noname that you suspect or also the use of
back-to-back switches?
| Quote: |
The OP has not described what tests and results he has. I'd expect
that by now he's ruled out physical cable problems and sypware.
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I'm not located on-site. Therefore at this stage it is an exercise of
gathering information, putting together a plan and looking at those
things that I can remotely.
| Quote: | If
not then I suspect he's not troubleshooting methodically.
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--
AnthonyL |
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AnthonyL
Guest
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| Posted:
Fri Apr 22, 2005 3:06 pm Post subject:
Re: Switch to switch causing traffic problems? |
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On Fri, 22 Apr 2005 09:21:59 GMT, nospam@please.invalid (AnthonyL)
wrote:
| Quote: | On 21 Apr 2005 09:37:02 -0400, adykes@panix.com (Al Dykes) wrote:
Do a netstat -e on all your boxes. If the error counters are zero or
single digits you don't have a cable problem. If they are higher you
may have a cable problem or something else but you'll have narrowed
down the problem.
Results as below for netstat -e -s
Would you agree they seem ok?
oops - was concentrating only on Errors - |
| Quote: | Interface Statistics
Received Sent
Unknown protocols 3912
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Various examples on the web have (very) high Unknown protocols in
their examples but haven't found an explanation.
I currently have 9 Unknown on my machine and not sure why I should
have any or if it matters.
--
AnthonyL |
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Al Dykes
Guest
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| Posted:
Fri Apr 22, 2005 3:10 pm Post subject:
Re: Switch to switch causing traffic problems? |
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In article <4268c31b.4325970@news.zen.co.uk>,
AnthonyL <nospam@please.invalid> wrote:
| Quote: | On 21 Apr 2005 10:46:08 -0400, adykes@panix.com (Al Dykes) wrote:
IMO the back-to-back noname switches may be a problem with the IPX
broadcasts. This can be proved by moving a problametic PC to site2
and hooking ot up to the local LAN. I
Is it primarily the noname that you suspect or also the use of
back-to-back switches?
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Both ? Either ? I'd guess that by themselves the noname switch and
AT would handle IPX and broadcasts OK, and AT is an OK brand. It's
the combination. I don't want to make too much of this, but I've seen
noname LAN equipment miss behave wne used in ways the manufacturer
did't anticipate, and it's easy to swap a switch out for a hub if you
have a replacement.
| Quote: | The OP has not described what tests and results he has. I'd expect
that by now he's ruled out physical cable problems and sypware.
I'm not located on-site. Therefore at this stage it is an exercise
of >gathering information, putting together a plan and looking at
those >things that I can remotely. > If not then I suspect he's not
troubleshooting methodically. > > >-- >AnthonyL
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Goog luck.
--
a d y k e s @ p a n i x . c o m
Don't blame me. I voted for Gore. |
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Al Dykes
Guest
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| Posted:
Fri Apr 22, 2005 3:15 pm Post subject:
Re: Switch to switch causing traffic problems? |
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In article <4268c84a.5649984@news.zen.co.uk>,
AnthonyL <nospam@please.invalid> wrote:
| Quote: | On Fri, 22 Apr 2005 09:21:59 GMT, nospam@please.invalid (AnthonyL)
wrote:
On 21 Apr 2005 09:37:02 -0400, adykes@panix.com (Al Dykes) wrote:
Do a netstat -e on all your boxes. If the error counters are zero or
single digits you don't have a cable problem. If they are higher you
may have a cable problem or something else but you'll have narrowed
down the problem.
Results as below for netstat -e -s
Would you agree they seem ok?
oops - was concentrating only on Errors -
Interface Statistics
Received Sent
Unknown protocols 3912
Various examples on the web have (very) high Unknown protocols in
their examples but haven't found an explanation.
I currently have 9 Unknown on my machine and not sure why I should
have any or if it matters.
--
AnthonyL
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Unknown protocols would't worry me offhand, expecially when you've got
an IPX box on the LAN. YOu should always show these numbers with the
overall numbers to get an idea of percentage.
If you're going to be a LAN technicial you should have a laptop with
etheral (and other tools) on it and a small 4 port 10/100 HUB in your
bag. YOu can always insert this hub in-line in a CAT5 circuit you need
to monitor and this will give you a jack to plug the laptop into.
You can buy hubs on eBay. Warning. Some items desribed as a hub are
really switches. When you buy one confirm for your self that is really
is a hub. The only cost a few bucks.
--
a d y k e s @ p a n i x . c o m
Don't blame me. I voted for Gore. |
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David Ross
Guest
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| Posted:
Sat Apr 23, 2005 12:20 am Post subject:
Re: Switch to switch causing traffic problems? |
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| Quote: | You can buy hubs on eBay. Warning. Some items desribed as a hub are
really switches. When you buy one confirm for your self that is really
is a hub. The only cost a few bucks.
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Do cheap GigE hubs exist? Non-cheap? |
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J. Clarke
Guest
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| Posted:
Sat Apr 23, 2005 12:20 am Post subject:
Re: Switch to switch causing traffic problems? |
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David Ross wrote:
| Quote: | You can buy hubs on eBay. Warning. Some items desribed as a hub are
really switches. When you buy one confirm for your self that is really
is a hub. The only cost a few bucks.
Do cheap GigE hubs exist? Non-cheap?
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No gigabit ethernet hubs exist except possibly for hand-made one-offs in
laboratories somewhere. To get a monitoring port on gigabit you're going
to have to get a managed switch. Surprisingly, there is one available at a
not too terrible price, the Hawking Tech HGS16S for around $250. I have no
idea how well it works, but one limitation is that it can only monitor two
ports at a time. Still, as a diagnostic tool a crappy managed switch is
still better than an unmanaged one.
--
--John
to email, dial "usenet" and validate
(was jclarke at eye bee em dot net) |
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Stephen Furley
Guest
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| Posted:
Mon Apr 25, 2005 4:04 pm Post subject:
Re: Switch to switch causing traffic problems? |
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adykes@panix.com (Al Dykes) wrote in message news:<d4aij4$80d$1@panix5.panix.com>...
Are the switches auto-negotiating speed and duplex? If so, are they
negotiation duplex correctly. I have seen occasional problems with
this between Extreme and Netgear kit. |
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