Solved

Routing problem on Server

Posted on 2004-08-06
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Last Modified: 2010-04-11
2 servers with same config on same subnet. One can get to LAN and Internet. Other can only get to LAN... No Internet.

I noticed that on the routing tables for the problematic server, a bunch of the metrics are 20... that doesn't seem right. Isn't that the expected amount of hops?

Here are the outputs of a ROUTE PRINT command on the servers.  The problematic server is the first one.

How can I fix it?


---------------------------------------------------

Microsoft Windows [Version 5.2.3790]
(C) Copyright 1985-2003 Microsoft Corp.

C:\Documents and Settings\Administrator.STISD>route print

IPv4 Route Table
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x30004 ...00 0f 1f 67 8e 9f ...... Intel(R) PRO/1000 XT Network Connection
===========================================================================
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0         10.5.0.1         10.5.2.4     20
         10.5.0.0      255.255.0.0         10.5.2.4         10.5.2.4     20
         10.5.2.4  255.255.255.255        127.0.0.1        127.0.0.1     20
   10.255.255.255  255.255.255.255         10.5.2.4         10.5.2.4     20
        127.0.0.0        255.0.0.0        127.0.0.1        127.0.0.1      1
        224.0.0.0        240.0.0.0         10.5.2.4         10.5.2.4     20
  255.255.255.255  255.255.255.255         10.5.2.4         10.5.2.4      1
Default Gateway:          10.5.0.1
===========================================================================
Persistent Routes:
  None

C:\Documents and Settings\Administrator.STISD>













Microsoft Windows 2000 [Version 5.00.2195]
(C) Copyright 1985-2000 Microsoft Corp.

C:\Documents and Settings\Administrator.STISD>route print
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x1000003 ...00 06 5b 38 e2 70 ...... Intel 8255x-based Integrated Fast Ethernet

===========================================================================
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0         10.5.0.1        10.5.2.2       1
         10.5.0.0      255.255.0.0         10.5.2.2        10.5.2.2       1
         10.5.2.2  255.255.255.255        127.0.0.1       127.0.0.1       1
   10.255.255.255  255.255.255.255         10.5.2.2        10.5.2.2       1
        127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1       1
        224.0.0.0        224.0.0.0         10.5.2.2        10.5.2.2       1
  255.255.255.255  255.255.255.255         10.5.2.2        10.5.2.2       1
Default Gateway:          10.5.0.1
===========================================================================
Persistent Routes:
  None

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Question by:smetterd
14 Comments
 
LVL 57

Expert Comment

by:Pete Long
ID: 11739548
the metric is the administrative cost - the lower the metric the higher up the packing order the route is chosen
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Author Comment

by:smetterd
ID: 11739573
So then why would these two servers show the different metrics? Are you saying that this is not my Internet access problem?
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LVL 57

Expert Comment

by:Pete Long
ID: 11739626
no its not the problem - metrics come in to play when multiple routes to the same network are available - the server chooses the one with the lowest metric first
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Author Comment

by:smetterd
ID: 11739683
Crud, so do you have any suggestions on my problem?

2 servers with same config on same subnet. One can get to LAN & Internet. Other can only get to LAN... No Internet.
0
 
LVL 2

Author Comment

by:smetterd
ID: 11739688
I have ruled out bad NIC hardware.
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LVL 57

Expert Comment

by:Pete Long
ID: 11739699
what does tracert and nslookup tell you?
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LVL 4

Expert Comment

by:ErikPhilips
ID: 11739940
In the Advanced TCP/IP Settings is the Automatic metric enabled on the Server/Nic with the 20 metric?
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Expert Comment

by:shad0_cheng
ID: 11740741
Things to check on the machine that has problem to the net:
1. Ping www.yahoo.com (see if DNS works or not)
2. Check you IE connection settings, make sure you are not running through a proxy
3. Make sure your router allows this IP address to access the internet (might be blocked)

let us know the error to #1 and also the error when you try to access www.yahoo.com from IE.

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Expert Comment

by:tropsmr2
ID: 11741214
I like shad0's general direction.  To that, I think it might be helpful to post the ipconfig/all from both machines. Helps fill in the overall picture....
In addition, would like to see the ARP table of the router, if possible  
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LVL 11

Expert Comment

by:PennGwyn
ID: 11754606
What are the MTU settings of the two machines? Is there any router config specific to handling of either address?
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Author Comment

by:smetterd
ID: 11758331
Manana...
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LVL 2

Author Comment

by:smetterd
ID: 11844628
Solved ourselves with Firewall chaining. Apparently an issue with muliple standalone ISA's
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