[THIN] Re: No route to Specified Subnet Address

  • From: "Ryan Lambert" <rlambert@xxxxxxxxxxxxxxx>
  • To: <thin@xxxxxxxxxxxxx>
  • Date: Fri, 30 Jul 2004 14:21:42 -0400

Hmmh.

Wonder if it's a dual homing issue at all, then.

-----Original Message-----
From: Friese, Casey A. [mailto:CAFriese@xxxxxxxxxxxx] 
Sent: Friday, July 30, 2004 2:19 PM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] Re: No route to Specified Subnet Address

Disabeling the other nic didn't prove to work

-----Original Message-----
From: Ryan Lambert [mailto:rlambert@xxxxxxxxxxxxxxx] 
Sent: Friday, July 30, 2004 12:16 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: No route to Specified Subnet Address

Interesting... 

If you disable that NIC facing the DB (can you?) all works fine 100% of
the time? Sounds like you've pretty much tried everything, but just to
confirm. I'd also make sure the connection with the gateway configured
is the one that is showing up in the TCP/IP -> Properties general
page...

Other than that, wow...

-----Original Message-----
From: Friese, Casey A. [mailto:CAFriese@xxxxxxxxxxxx] 
Sent: Friday, July 30, 2004 1:10 PM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] Re: No route to Specified Subnet Address

That is correct.  My DG is configured on the client facing nic.  My nic
sharing a segment with the DB servers doesn't have a DG because there's
nothing there acting as a router

-----Original Message-----
From: Ryan Lambert [mailto:rlambert@xxxxxxxxxxxxxxx] 
Sent: Friday, July 30, 2004 11:56 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: No route to Specified Subnet Address

I've glanced back down through this thread, trying to double check...
didn't see any mention of it. You have only one gateway configured, and
static routes assigned for the other network?

This is the recommended setup according to this document, even
pre-Win2k3.

-----Original Message-----
From: Friese, Casey A. [mailto:CAFriese@xxxxxxxxxxxx] 
Sent: Friday, July 30, 2004 12:49 PM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] Re: No route to Specified Subnet Address

http://support.citrix.com/servlet/KbServlet/download/2371-102-8728/Netwo
rkin
g%20Issues%20Affecting%20MetaFrame%20Environments%203.041.pdf

There's a white paper - saying multi-home is possible but not desirable.
Only risk is security and possible latency issues.  As long as
everything is
configured fine, we should be good.  I've gone through and made sure I
was
configured correctly.  

-----Original Message-----
From: Ryan Lambert [mailto:rlambert@xxxxxxxxxxxxxxx] 
Sent: Friday, July 30, 2004 11:42 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: No route to Specified Subnet Address

Dual homing is generally a bad idea, yeah. :)

-----Original Message-----
From: Friese, Casey A. [mailto:CAFriese@xxxxxxxxxxxx] 
Sent: Friday, July 30, 2004 12:33 PM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] Re: No route to Specified Subnet Address

I'll take that advice and start tromping on getting another server to
separate them out.  Regardless of whether I do that though, I'm assuming
that my dual home problem causing the "No route to specified subnet
address"
is still going to exist. 

-----Original Message-----
From: Ryan Lambert [mailto:rlambert@xxxxxxxxxxxxxxx] 
Sent: Friday, July 30, 2004 11:23 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: No route to Specified Subnet Address

I run WI/Citrix on the same box in quite a few scenarios (ie: Clients
who can't afford another server but want the web experience instead of
having to set up PNs everywhere). To be honest, I haven't had any
stability/reliability issues in such a setup. I've done this on both
Windows 2000 and Windows 2003 servers.

I agree with Andrew, though... if you've got something spare, use it
instead. It's better practice overall.

/Ryan

-----Original Message-----
From: Andrew Rogers [mailto:Andrew.Rogers@xxxxxxxxxxxxxxxxxx] 
Sent: Friday, July 30, 2004 12:06 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: No route to Specified Subnet Address

I'm not sure if theres particular security problems, it just seems,
well, just plain wrong to me!
Do you not have any other spare, underutilised servers that could run
IIS? I really dont think you'll get far with the dual homing :) At
least, noone on here (that I remember!) has come back with a success
story..

Andrew
--o--

>>> CAFriese@xxxxxxxxxxxx 30/07/04 16:50:22 >>>
LMAO, I might be mad!  

What are the reasons for not running WI/IIS on the same box as citrix?
Load? Security? - if Security, is it plausible to run on the same box if
all
access to the WI is done only from internal?  If load, does it really
matter
since I have more than 1 server load sharing in my farm?

I'm just trying to get some answers because if I go to my boss and
request a
new server he's going to want the reasoning for having to dig in his
pockets
some more after having already given his arm and leg for Citrix - the
stuff's not cheap!.

I've read some dual-homing nightmares myself.  Unfortunately my hands
are
tied in this respect because our network guys thought it more sensible
to
not have traffic competing on the same NICs.  Some of our apps talk to
back
end oracle DB's so our Citrix servers listen on one NIC and the other
NIC
shares a common network with the DB servers   

-----Original Message-----
From: Andrew Rogers [mailto:Andrew.Rogers@xxxxxxxxxxxxxxxxxx] 
Sent: Friday, July 30, 2004 10:32 AM
To: thin@xxxxxxxxxxxxx 
Subject: [THIN] Re: No route to Specified Subnet Address

Dual homing citrix servers is one thing that comes up from time to
time..
its generally very ill advised as you've found! :)

I dont think theres any real support for it in either TS or Citrix from
what
I remember, the answer will be split WI and Citrix to two boxes :(
(IIS and Citrix on the same box, are you mad?? :) )

Andrew
--o--

>>> CAFriese@xxxxxxxxxxxx 30/07/04 16:07:16 >>>
OK - I think I may have found the answer.

 

My Citrix server/WI server is dual homed.  I have my ica-tcp connections
configured to listen for connection on only one of those cards.  I've
noticed that, at time, when I create ica's and I go in to take a look at
them with notepad, that the wrong IP address has been put in - the one
from
the other card in the server.  Sometimes creating an ica gets the
correct
IP, other times not.  Not sure if this is a bug in 3.0 or what?!?  It's
really annoying also, when creating an ica that it uses an IP instead of
the
machine name - wondering if there's anyway to change that?

 

So, I think my WI is actually trying to call the connections through the
wrong IP.  I'll have to set my ica-tcp configuration to listen on both
cards
but that's really counter-productive to what we are trying to
accomplish.
It's worth a try though.

 

-----Original Message-----
From: Parker, Dennis [mailto:Dennis.Parker@xxxxxxxxxx] 
Sent: Thursday, July 29, 2004 1:24 PM
To: 'thin@xxxxxxxxxxxxx' 
Subject: [THIN] Re: No route to Specified Subnet Address

 

Many things could be going wrong here.  I'm going to shoot some
troubleshooting ideas at you as there really isn't enough information to
tell what the problem really is.

 

1.  Are the DEV and Production servers on the same subnet?  Can you ping
the
IP address you believe you should be connecting to from the workstation
you
are connecting from?

 

2.  Open a command prompt before clicking on the application icon and
prepare a 'netstat -n' command.  Click on the icon and quickly switch
back
to the command prompt and execute the 'netstat -n' command.  See what IP
address you are attempting to connect to.  Make sure it is what you
expect
to be connecting to.

 

3.  Do a trace route to the IP address?

 

4.  Probably not an issue, but make sure that CSG and/or translation of
the
Citrix address isn't a problem.

 

If these don't help, shoot more info out and maybe we can help.

 

Dennis Parker, MCSE, CCA
Senior Systems Analyst
Fiserv EFT/CNS
4550 SW Macadam Ave, Ste 100
Portland, Or. 97239
Direct: 503-274-6785
Fax:    503-274-6619

This e-mail is confidential and may well be legally privileged.   If you
have received it in error, you are on notice of its status.   Please
notify
us immediately by reply e-mail and then delete this message from your
system.   Please do not copy it or use it for any purposes, or disclose
its
contents to any other person.   To do so could violate state and Federal
privacy laws.  
Thank you for your cooperation.   Please contact me if you need
assistance.

 

  _____  

From: Friese, Casey A. [mailto:CAFriese@xxxxxxxxxxxx] 
Sent: Thursday, July 29, 2004 10:27 AM
To: 'thin@xxxxxxxxxxxxx' 
Subject: [THIN] No route to Specified Subnet Address

Using MPS 3.0 and trying to access an app through the WI.  When click
the
icon, I get "No route to the specified subnet address"

 

I can successfully launch the app from my dev Citrix server, but not
production.  Accessing the WI is all local, not from outside of my
company.
I've read many articles on google but they all seem to talk about the
problem when accessing the server from the outside.

 

The dev and prod WI settings are configured identically.

 

Anyone offer me any help here?


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