(PM) Traffic bottleneck? No DNS?

Martin Preece (martint@phonetech.com)
Wed, 24 Jun 1998 14:34:11 -0400

I have 2 PM-2e running ComOS 3.7.2 with US Robotics 33.6K Sportster
modems. Currently one of the PMs is a PM-2e with the Livingston
internal router (PM-2eR ??). Recently we have had several trouble calls
where the user could login but can't "go any where" (this includes, DNS
look up, mail, & news). When we look at the users connection in the
Portmaster they are sending and receiving data.
This condition appears to be traffic related: less than 20-25 users =
OK, but above that some (not all) users experience this problem.
Sometimes, not always, if they stay connected long enough 30 second - 2
mins they can go "somewhere".

Our network equipment supplier told us that the router added to the one
PM-2e doesn't have enough capacity (??) to handle that many connections
and that we should get an external router to replace it. We have
purrchased and plan to install a Cisco 2501 router. (Diagrams below)

1. My questions is: does all this make sense?
2. Could the base10 ethernet that connects all this together be the
bottleneck?

Any input would be appreciated.

Current Setup:
/------ pbx link to a remote PM2eR in another city
|
[DSU/CSU]--> telco T1------------> the Internet
|
|
|
30 Sportster modems ----> [PM2eR]-\ /--------- [main server]
|---->[ethernet hub]
15 Sportster modems ----> [PM2e ]-/ | \--------- [web hosting
server]
|
8 port USR Netserver --------------------/

Proposed Setup:
/------ pbx link to a remote PM2eR in another city
|
[DSU/CSU]--> telco T1------------> the Internet
|
|
[Cisco 2501]------\
|
|
30 Sportster modems ----> [PM2eR]-\ | /-- [main server]
|---->[ethernet hub]--|
15 Sportster modems ----> [PM2e ]-/ | \-- [web hosting
server
|
8 port USR Netserver --------------------/

-- 


Martin Preece
Computer Consulting and Web Site Design
(407)-784-5897
-
To unsubscribe, email 'majordomo@livingston.com' with
'unsubscribe portmaster-users' in the body of the message.
Searchable list archive: <URL:http://www.livingston.com/Tech/archive/>