There are several ways to check what is causing this.
If you think A pormaster is causing bottleneck.
check memory usage of that portmaster
try to connect to another portmater to see the the problem still exists.
try ping with IP address, this way, DNS is not used.
If the both portmasters experiening the same problem, it well could be
the too much traffic going through the HUB, you can alway "see" that
via collison lamp.
I you can probably get snmp from router too. to see all the traffic
information.
funny thing that not all of your users are not experiencing the problem,
this seems to indicate the memory problem. Not traffic on the HUB.
Add some memory to PM if there are short of memory.
Not sure for PM-2ER but for pm-2e, you can get 4MG or so. 30in 70ns or
faster with parity, I beleive. That is what we use.
For some sites we use 20 ports for modems and 5 BRI port and running
SNMP on 4MG and it seems to work just fine.
Good luck,
Tatsuya
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On Wed, 24 Jun 1998, Martin Preece wrote:
> 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
> -
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