From: W Walla (wallafly@hotmail.com)
Date: Wed Jul 21 2004 - 02:26:29 GMT-3
Hi, Thanks!
Interesting idea.
I checked the configs on the routers just now and there is NO mention of MTU
anywhere.. Would you suggest that I set it, if so, to 1500? The link from
A to B routers is 256k, so maybe if I set the MTU it will send a larger
packet?
When I am trying to telnet to a Server in LAN C, from LAN A (desktop) it
just times out...no refusal message. I can telnet From A to B though desktop
to a server.. And from LAn B to LAN C server to server... But again, not
A to C... SO strange to me!
There is no PAT or anything like that, it is a Private Frame network and no
addressing shotage problems.
Does this give you a better idea?
I can not get to the routers until the morning and my TAC acct has
expired... Getting a new smartnet soon.
I will look up how to do the don't defrag bit and try that also in the
morning.
Thanks Dan!
>From: "Daniel Sheedy" <dansheedy@gmx.net>
>To: "W Walla" <wallafly@hotmail.com>,<ccielab@groupstudy.com>
>Subject: Re: CAn Ping but not telnet /
>Date: Wed, 21 Jul 2004 07:11:03 +0200
>
>Hi Walla,
>
>Have you checked the MTU tfrom Lan A to Lan C? I had this problem from
>Australia to New Zealand once. Could do anything with tiny tiny packets,
>but as soon as it got bigger it timed out. It was a black hole in the ISP
>network combined with a smaller MTU.
>
>Do a ping from lan A to a computer on Lan C with the 'dont defragment' bit
>set.
>
>Also, what does it say, when you try to do a telnet? Does it just timeout?
>Or do you get a 'connection refused' message?
>Is there an access group under the line vty perchance?
>Is there NAT /PAT involved anywhere? Is so, is it passing through
>everything properly?
>
>Let us know what you find...
>
>Dan
>
>
>----- Original Message -----
>From: "W Walla" <wallafly@hotmail.com>
>To: <ccielab@groupstudy.com>
>Sent: Wednesday, July 21, 2004 7:00 AM
>Subject: CAn Ping but not telnet /
>
>
> > Not as easy as it sounds. I can ping across my wan from my lan through
>a
> > remote router and across that wan to another LAN. 0--0--0 A--B--C <--
>like
> > this: From a through b to c's LAN. However! I can not telnet from A's
>LAN
> > into C's LAN.
> >
> > From A's LAN I can telnet and remote desktop into B's LAN.
> > From B's LAN I can Telnet and Remote desktop into C's LAN.
> > ButI can not Telnet or remote desktop from A's LAN into C's LAN through
> > Router B!
> >
> > I do not have any acl's applied on any routers... There used to be some
>but
> > they have been unapplied from any and all interfaces. I am not aware of
>any
> > Firewalls in between. WhenI trace router from Router A to Router C it
>hits
> > all appropriate interfaces along the way... Not like I could see a
>firewall
> > anyway probably..
> >
> > There is also some ospf and some statics on these routers...
> >
> > Anything jump out at anyone as the possible causes? I have reasearched
>this
> > for a full 2 days now and desperately need access.
> >
> > Help!
> >
> > Thanks!
> >
> > wallafly@hotmail.com
> >
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