question ncp + lotus domino

* asuescun (Wed, 21 Oct 2009 21:06:04 GMT)
>
> i have a lotus domino server running over oes2, but several times a
> day the users are having problems cause suddendly the lotus server
> stop to respond but the service on servers oes is running.
> I run a debug on domino and i send it to IBM, and they replayed to me
> that the problem is that there are many connections on 524 port and
> all band width is consumed, and the domino server can`t accept
> connections.

Did they give you a detailed analysis? The number of connections is not
relevant for the bandwith. You could consume all the bandwith with just
one connection.

> they suggest to configure a secondary ip address to manage 524 port, is
> that correct?,

No, that is just nonsense. If bandwidth would be the problem, adding
additional network cards would have exactly zero effect.

> what would happen if i block traffic over 524 port?, how can i do
> that?

What are you using NCP for? eDirectory synchronization? NCP client
access? Why don't you verify what IBM says? There are a lot of tools
that can monitor network performance, [1] and [2] give an overview.

If you don't have experience with any of these (like me), I would first
do a general check of the IBM claims: do you have any additional network
services running on the same machine? Do they show the same behaviour as
Notes (they should if IBM is right)? Do a ping and compare these with
the slowdown times. You should see the response times going up. Also
Wireshark is able to do some basic performance overview.


Good luck, Thorsten
[1] http://en.wikipedia.org/wiki/Network...ic_measurement
[2]
http://en.wikipedia.org/wiki/Compari...toring_systems