slow performances - weird behaviour

From: Andrei G (AndreiG_at_discussions.microsoft.com)
Date: 12/28/04 

Date: Mon, 27 Dec 2004 17:57:03 -0800

machine - PIII 800 / 512 MB
2 NICs
internet pipe: 10 Mbps down / 1 Mbps up
DHCP IP and DNS on internet NIC
static IP no GW on LAN NIC, DNS same as IP

ISA 2004 on win srv 2003
15-20 web proxy users
DNS server cached on ISA machine;
forwards on LAN DNS servers to ISA machine;
Cache enabled. Cache active objects -> normally
Logging enabled.

This is what is happening .
Max download speed varies or is much under the max values.
If I connect a laptop or a desktop to the cable modem then the download
speed is up to max (8-9 Mbps).
On the ISA machine (IE on direct connection) or LAN users the download speed
is half or even one third.

I changed several time the NICs (both). Same result.

What I noticed.
If I'm using a download accelerator on any of the workstations behind ISA
then download speed is almost the expected one (7-9 Mbps). Without this,
using only IE or any other browser the download speed is considerably lower.

Very seldom the speed is maximum for all the machines by itself (no change)
or if I change manually the default DNS server (that one obtained dynamically
from the ISP). It works fine only for a short period of time. The speed on
that specific download session is kept fine up to the end of the file.

Somebody has mentioned something about the HW. There is no error in event
viewer and everything seems to work fine. Do I have to change the machine?

Any advice would be highly appreciated.

Thank you.

Andrei

Relevant Pages

  • slow performance - weird behaviour
    ... 10 Mbps down / 1 Mbps up ... DHCP IP and DNS on internet NIC ... DNS server cached on ISA machine; ... I changed several time the NICs. ...
    (microsoft.public.isaserver)
  • Re: Urgent! New router and big disaster
    ... NIC, you need to specify an external DNS server for DNS, instead of the ... Both NICs should point to his internal IP for DNS. ... forward ports to it reliably in the router. ...
    (microsoft.public.windows.server.sbs)
  • Re: issue with DC replication
    ... DNS server to ... As Jorge stated and explained why, multiple NICs on a DC is not recommended ... internet gateway, it is recommended to purchase an inexpensive, or cable/DLS ... there are some registry changes to eliminate the ...
    (microsoft.public.windows.server.active_directory)
  • Re: Machines not being registered in DNS anymore
    ... using two nics on a dc is only a problem when both nics are on the ... But if on different subnets, and one is NOT reachable by clients, yet the registration exists in DNS and will more than likely be given to a client in a query response, then YES it WILL be problematic. ... If you have an ISP's (or some other outside DNS server or even using your router as a DNS server) DNS addresses in your IP configuration, they need to be REMOVED and ONLY use the internal DNS server. ... there are some registry changes to eliminate the registration of the external NIC or simply use the internal networking routing to allow access. ...
    (microsoft.public.windows.server.dns)
  • Re: Some xp clients very slow to boot
    ... this connection addresses in DNS". ... You can stop DNS registering by telling it to only listen to the internal interface, however to control netlogon requires registry alterations. ... If the both NICs are internal, I would suggest to pick a subnet, team the NICs and allow your internal routers handle the traffic between subnets - Good luck! ... The one section of the article that disables these records is done with this registry entry: ...
    (microsoft.public.windows.server.sbs)