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тАО07-30-2005 11:10 AM
тАО07-30-2005 11:10 AM
TCPIP telnet sesions slow
-Phil
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тАО07-30-2005 02:41 PM
тАО07-30-2005 02:41 PM
Re: TCPIP telnet sesions slow
Is it the initial connection that takes up to
60 seconds or are you seeing response delays of
that magnitude once the connection is established?
What version of TCPIP services do you have?
How are the boxes connected to the network?
Are you seeing any other network problems?
Dave
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тАО07-31-2005 09:04 AM
тАО07-31-2005 09:04 AM
Re: TCPIP telnet sesions slow
Slow responses on initial connection are sometimes due to delays in the DNS lookup of the IP addreess of the incoming connection.
Purely Personal Opinion
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тАО07-31-2005 06:59 PM
тАО07-31-2005 06:59 PM
Re: TCPIP telnet sesions slow
as posted above, it's very important when your connection is slow.
May be interesting kwnow if just telnet is slow.
For example,
- all services are continously slow: mey be network card synchronizing with switch;
- al services are slow when starting, then they work fine: it a DNS trouble;
- telnet is slow while other services work fine: some configuration of telnet is bad.
Antonio Vigliotti
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тАО08-01-2005 07:18 AM
тАО08-01-2005 07:18 AM
Re: TCPIP telnet sesions slow
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тАО08-01-2005 01:09 PM
тАО08-01-2005 01:09 PM
Re: TCPIP telnet sesions slow
TCPIP 6 with ECO 5.
Is the system slow or just the telnet users.
What does monitor system show?
Is it slow from the console?
In otherwords, is it a network problem.
Let's isolate that first.
If you do a
Anal/system
show lan/count
there are many pages. Look for failures or errors. For example alignment errors or receive errors.
Bob
Bob
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тАО08-01-2005 06:27 PM
тАО08-01-2005 06:27 PM
Re: TCPIP telnet sesions slow
in a situation like this, I would use CTRL-T as a first check, when a session seems to 'hang'. Control-T is handled in the terminal driver, so not much overhead/CPU involved and no disk-IOs. You would expect an immediate response from CTRL-T.
If CTRL-T does not respond immediately, try it on the console. It may be a system, not a network problem. If it's o.k. on the console - while the TELNET session 'hangs', try PING next (from your TELNET client to the node you're logged into).
Does this 'hang' affect ALL users on the same or both nodes of the cluster at the SAME time ? Try running 2 TELNET sessions from your TELNET client and check whether they hang at the same time.
Did you check OPERATOR.LOG ?
Volker.
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тАО08-01-2005 06:47 PM
тАО08-01-2005 06:47 PM
Re: TCPIP telnet sesions slow
Another thing you may look at if the telnet clients (PC?) are on a different subnet: I have seen this trouble when the Alpha had an error in the routing tables: Check the routing tables and defualt route on that machine:
$ TCPIP SHOW ROUTE/FULL
$ TCPIP netstat -r
$ TCPIP netstat -rs gives you statistics
OpenVMS Developer & System Manager
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тАО08-01-2005 07:10 PM
тАО08-01-2005 07:10 PM
Re: TCPIP telnet sesions slow
At first glance you can evaluate NIC parameters:
$ MC LANCP SHOW DEV /CHAR
You can see operational values (half duplex vs full duplex, NIC speed).
You can also read error counters
$ MC LANCP SHOW DEV /COUNT
Antonio Vigliotti