Solved

SBS 2003 in NAT configuration dropping packets

Posted on 2004-03-24
5
390 Views
Last Modified: 2012-08-14
We are having a situation with our Windows SBS 2003 server dropping packets.  The machine is setup as a NAT device for our network and handles DHCP, DNS, Exchange, etc.  We have 2 T1's bound together on the outside and we consistently use a megabit or more of bandwidth throughout the day.  Our stock feeds will occassionally drop as will various web pages.  Is there any way to increase the NAT buffer or some other config item I need to change?  Thanks in advance, because this is really frustrating.
0
Comment
Question by:wrsinclair
  • 2
5 Comments
 
LVL 2

Expert Comment

by:ministry92
ID: 10669173
how do you know where the packets are dropped?  a couple t1's of traffic is nothing to cause much trouble.  

How are the t1's boud together?  Cisco?  I bet mroute-cache  and route-cache is on those interface...and they are doing round robin style routing.. that will cause packet loss every time... or maybe not.
0
 
LVL 1

Author Comment

by:wrsinclair
ID: 10669231
My initial thought was that problem WAS in the Cisco config, but I'm not a Cisco guy.  Can you tell me more about mroute-cache and route-cache?  We are planning to reprogram the router tonight if need be.
0
 
LVL 1

Author Comment

by:wrsinclair
ID: 10709519
The problem ended up being related to DNS lookups from the LAN.  The SBS server does not handout the public DNS servers by default and it was being overwelmed while trying to pass forwarding requests.  I added the public DNS servers to the scope options and the problem seems to have gone away.
0
 

Accepted Solution

by:
CetusMOD earned 0 total points
ID: 11171153
PAQed, with points refunded (300)

CetusMOD
Community Support Moderator
0

Featured Post

Gigs: Get Your Project Delivered by an Expert

Select from freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely and get projects done right.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

FIPS stands for the Federal Information Processing Standardisation and FIPS 140-2 is a collection of standards that are generically associated with hardware and software cryptography. In most cases, people can refer to this as the method of encrypti…
A common practice in small networks is making file sharing easy which works extremely well when intra-network security is not an issue. In essence, everyone, that is "Everyone", is given access to all of the shared files - often the entire C: drive …
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.
Established in 1997, Technology Architects has become one of the most reputable technology solutions companies in the country. TA have been providing businesses with cost effective state-of-the-art solutions and unparalleled service that is designed…

816 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

8 Experts available now in Live!

Get 1:1 Help Now