Re: NIC slowing my Internet connection! Help!

Merv - I have solved it! - was an issue with the NIC settings. I am not
technically minded enough to know the details, but after using TCP Optimiser
& DrTCP they appear to have reset the RWIN & the MTU settings. Result is
that throughput has shot up from 2mb to 6mb!! I can only conclude that as
the NIC's are old models perhaps their default settings were not right.
Thanks


"Merv Porter [SBS-MVP]" <mwport@xxxxxxxxxxxxxxxxxxx> wrote in message
news:eUyZSo8dHHA.3996@xxxxxxxxxxxxxxxxxxxxxxx
Hi Al,

Your NIC configuration looks good.

At a command prompt, type:

ipconfig /all>c:\serveripcfg.txt

then open the .txt file in c:\ with Notepad, copy and then paste into a
post.

I'll do some more looking to see if I can find anything to blame the slow
Internet access on.

--
Merv Porter [SBS-MVP]
============================

"Al" <noreply@xxxxxxxxxxxxxxxx> wrote in message
news:e5WdnSTUR9AJ9YjbRVnytwA@xxxxxxxxxxxxxxxxx
Merv - thanks - have run through that & all seemed in order for the NIC
Bindings.
Ran an ipconfig, but not sure how to copy it (sorry!) - it showed
however:-
NIC1
DHCP NO
IP 10.0.0.2
Mask 255.255.255.0
Default Gateway BLANK
DNS 10.0.0.2
WINS 10.0.0.2

NIC 2 (the external interface)
DHCO NO
IP 192.168.1.2
Mask 255.255.255.0
Default Gateway 192.168.1.1
DNS 10.0.0.2
WINS 10.0.0.2

Does that give any clues? or can you refresh my memory on how to copy the
screen at the cmd prompt!?

Thanks

Al



"Merv Porter [SBS-MVP]" <mwport@xxxxxxxxxxxxxxxxxxx> wrote in message
news:edX0pF8dHHA.3648@xxxxxxxxxxxxxxxxxxxxxxx
Assuming this isn't a hardware issue... (a switch or cable or a
component in the server)

1. Can you please post an ipconfig /all for the SBS server.

2. Make sure the NIC binding are correct on the server.

... Right click My Network Places...Properties. Highlight the Internal
NIC. Then select Advanced...Advanced Settings from the top menu for that
window.

The Internal NIC should be displayed first followed by the External
NIC. If not, move the Internal NIC to the top of the list.
The Internal NIC should have File and Printer Sharing bound (check
marked) to the TCP/IP Protocol.
The Internal NIC should have Client for Microsoft Networks bound
(check marked) to the TCP/IP Protocol.
The External NIC should be bound to TCP/IP only (no other protocols
or services).

3. Run ICW again to make sure it completes successfully

--
Merv Porter [SBS-MVP]
============================

"Al" <noreply@xxxxxxxxxxxxxxxx> wrote in message
news:F4CdnYj4AIop04jbnZ2dnUVZ8vmdnZ2d@xxxxxxxxxxxxxxxxx
Have had a strange issue for several weeks. SBS 2k set up as a 2 NIC
system with main NIC for internal network and 2nd NIC linked to an ADSL
Router (ADSL Max).
Previously the connection ran at 6+ mb to internet. Main network is
100mb.
Recently the internet connection has been stuck at 2mb only! - to begin
with I though this was a BT issue as 2mb stuck profiles are common,
however on testing by linking a laptop direct to the router rather than
through SBS, full speed was achieved & the BT speedtester showed the
ADSL profile as 7mb with an actual throughput of 6mb+. But if through
the SBS the throughput is consistently 2mb!! (no variation!)
I therefore deduced that the SBS must be slowing the speeds.
In the Administrator Console I found a warning that > Critical, Network
Interface threshold Bytes Total/sec > 5000000 & also Error Code (for
WMI) Neither mean much to me.
I thought that the 2nd NIC (which was a Netgear PCI ) might be faulty
so I replaced it with an Intel 100+ unit but the same problem occurs,
so it is not the NIC.
I have checked various settings on the NIC - it has QOS packet
scheduler active (so does the main internal nic) - tried with that
unchecked, no difference. It has a setting of Receive Buffer which is
set at 48 (same as the main onboard NIC for the internal network, but
the laptop was 128!) and a Transmit Control Blocks setting of 32.
Anyone got any ideas as to how / why the server is clearly reducing the
speed available over the 2nd NIC's connection to the Internet Router?
Thanks in advance









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