Re: Traceroute?

[Fredrik Björk <fredrik.bjork.list@xxxxxxxxxxxxxxxx>]

Hi!

You most probably have either of these problems:

One heavily loaded server (in terms of network traffic)
An assymetrical route setup (packets are routed via different routers when 
going in different directions)
A packet filter/firewall on one server (or router)
No DNS name on one or more routers/hosts

If you have a packet filter, one server or router blocks the traceroute 
packets and the timeout gives the long trace times.

Could you copy the results from both traces and post here? The easiest way 
to see the results is to first traceroute and then run DSPJOBLOG.

Example:

traceroute '193.0.0.193'
Probing possible routes to 193.0.0.193 using *ANY interface.
1 192-168-1-5.varberg.net (192.168.1.5) 7.15 0.896 1.66
2 2.varbergkabel-net01c.varberg.ne (217.73.102.2) 3.00 2.76 1.66
3 17.229.88.213.host.songnetworks. (213.88.229.17) 2.02 6.15 3.61
4 fe0-0-200.cty-pe1.vbg.se.sn.net (213.88.164.205) 2.81 1.82 3.05
5 ge0-0-0.joo.peer1.ams.nl.sn.net (62.95.54.113) 17.9 17.7 18.0
6 ge0-0-0.joo.peer1.ams.nl.sn.net (62.95.54.113) 18.0 17.8 18.4
7 Amsterdam1.ripe.net (195.69.144.68) 21.1 20.0 19.7
8 ns.ripe.net (193.0.0.193) 18.7 18.7 19.8

I'm not sure I'll be able to help you more due to lack of time, but I'm 
sure there are others out there!

/Fredrik

At 15:59 2007-03-28, you wrote:
> First of all i am not a network guy. I have a basic understand of all the 
> equipment and understand how it works. I have a situation that I don't 
> understand.
>
> AS400 820 is production system
> As400 820 is identical and is the HA system
>
> There are 2 10megabit/second lines attaching the 2 systems
> Both lines are defined the same (100m Full duplex)
>
> When I do a traceroute from Prod to HA, it takes about 2 seconds total
> When I do a traceroute from HA to Prod, it takes 15-20 seconds total
>
> I use the network address each time not the system name
> Both traces come back with 3 hops
> neither trace leaves the internal network loop
>
> I would appreciate any help as to why the time differences
>
> Thanks  in advance.
> Dave Willenborg
> FNTS
> Omaha NE
> --
> This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list
> To post a message email: MIDRANGE-L@xxxxxxxxxxxx
> To subscribe, unsubscribe, or change list options,
> visit: http://lists.midrange.com/mailman/listinfo/midrange-l
> or email: MIDRANGE-L-request@xxxxxxxxxxxx
> Before posting, please take a moment to review the archives
> at http://archive.midrange.com/midrange-l.