Take the 2-minute tour ×
Server Fault is a question and answer site for professional system and network administrators. It's 100% free, no registration required.

I have been struggling with this for a couple days now, maybe I just need some people with a fresh perspective to figure out what the issue is.

Basically I have a bunch of computers that are being routed through a specific gateway in order to access a web page that is hosted internally on a separate subnet. I set up static routes on all of the computers, and they all work... except one.

Here's what a route print -4 looks like for a working computer (Windows 7):

===========================================================================
Interface List
 14...xx xx xx xx xx xx ......Broadcom 802.11n Network Adapter
 11...xx xx xx xx xx xx ......Realtek PCIe GBE Family Controller
  1...........................Software Loopback Interface 1
 12...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter
 13...00 00 00 00 00 00 00 e0 Microsoft 6to4 Adapter
 17...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface
===========================================================================

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0   10.xxx.xxx.230    10.xxx.xxx.94     20
      10.zzz.zzz.0    255.255.255.0   10.xxx.xxx.147    10.xxx.xxx.94     21
     10.xxx.xxx.0    255.255.255.0         On-link     10.xxx.xxx.94    276
    10.xxx.xxx.94  255.255.255.255         On-link     10.xxx.xxx.94    276
   10.xxx.xxx.255  255.255.255.255         On-link     10.xxx.xxx.94    276
        127.0.0.0        255.0.0.0         On-link         127.0.0.1    306
        127.0.0.1  255.255.255.255         On-link         127.0.0.1    306
  127.255.255.255  255.255.255.255         On-link         127.0.0.1    306
        224.0.0.0        240.0.0.0         On-link         127.0.0.1    306
        224.0.0.0        240.0.0.0         On-link     10.xxx.xxx.94    276
  255.255.255.255  255.255.255.255         On-link         127.0.0.1    306
  255.255.255.255  255.255.255.255         On-link     10.xxx.xxx.94    276
===========================================================================
Persistent Routes:
  Network Address          Netmask  Gateway Address  Metric
      10.zzz.zzz.0    255.255.255.0   10.xxx.xxx.147       1
===========================================================================

And here's a route print -4 from the station that doesn't work (also Windows 7):

===========================================================================
Interface List
 10...xx xx xx xx xx xx ......Realtek PCIe GBE Family Controller
  1...........................Software Loopback Interface 1
 12...00 00 00 00 00 00 00 e0 Microsoft 6to4 Adapter
 14...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #2
 16...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface
===========================================================================

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0   10.xxx.xxx.230   10.xxx.xxx.132    276
      10.zzz.zzz.0    255.255.255.0   10.xxx.xxx.147   10.xxx.xxx.132     21
     10.xxx.xxx.0    255.255.255.0         On-link    10.xxx.xxx.132    276
   10.xxx.xxx.132  255.255.255.255         On-link    10.xxx.xxx.132    276
   10.xxx.xxx.255  255.255.255.255         On-link    10.xxx.xxx.132    276
        127.0.0.0        255.0.0.0         On-link         127.0.0.1    306
        127.0.0.1  255.255.255.255         On-link         127.0.0.1    306
  127.255.255.255  255.255.255.255         On-link         127.0.0.1    306
        224.0.0.0        240.0.0.0         On-link         127.0.0.1    306
        224.0.0.0        240.0.0.0         On-link    10.xxx.xxx.132    276
  255.255.255.255  255.255.255.255         On-link         127.0.0.1    306
  255.255.255.255  255.255.255.255         On-link    10.xxx.xxx.132    276
===========================================================================
Persistent Routes:
  Network Address          Netmask  Gateway Address  Metric
      10.zzz.zzz.0    255.255.255.0   10.xxx.xxx.147       1
===========================================================================

Both of these stations are running Windows 7.

So essentially what I am trying to do here is route all traffic to the 10.zzz.zzz.0 subnet through the 10.xxx.xxx.147 gateway. Everything else should go through the 10.xxx.xxx.230 gateway. This is the intended behavior, and again it is working everywhere but that one station. I noticed that the Active Route metric costs differ between the two stations, but I am new to the routing table and I am not sure how that is impacting the behavior.

I hope I have been able to explain the situation clearly. Any help would be much appreciated. I can provide any additional information if needed!

EDIT:

Here is a pathping from a working machine to a destination on the 10.zzz.zzz.0 subnet:

Tracing route to 10.zzz.zzz.2 over a maximum of 30 hops
  0  WorkingPC.company.local [10.xxx.xxx.185] 
  1     *     10.xxx.xxx.147 
  2  206.nnn.nnn.54 
  3  10.zzz.zzz.2
Computing statistics for 75 seconds...
             Source to Here   This Node/Link
Hop  RTT    Lost/Sent = Pct  Lost/Sent = Pct  Address
  0                                           WorkingPC.company.local [10.xxx.xxx.185] 
                                0/ 100 =  0%   |
  1    1ms     1/ 100 =  1%     1/ 100 =  1%  10.xxx.xxx.147 
                                0/ 100 =  0%   |
  2  ---     100/ 100 =100%   100/ 100 =100%  206.nnn.nnn.54 
                                0/ 100 =  0%   |
  3    1ms     0/ 100 =  0%     0/ 100 =  0%  10.zzz.zzz.2

Trace complete.

And here's the same pathping from the non-working machine:

Tracing route to 10.zzz.zzz.2 over a maximum of 30 hops

  0  BrokenPC.company.local [10.xxx.xxx.132] 
  1  10.xxx.xxx.147 
  2     *        *        *     
Computing statistics for 25 seconds...
            Source to Here   This Node/Link
Hop  RTT    Lost/Sent = Pct  Lost/Sent = Pct  Address
  0                                           BrokenPC.company.local [10.xxx.xxx.132] 
                                2/ 100 =  2%   |
  1    1ms     2/ 100 =  2%     0/ 100 =  0%  10.xxx.xxx.147 

Trace complete.

Here's a tracert from a working PC:

Tracing route to 10.zzz.zzz.2 over a maximum of 30 hops

  1     1 ms     1 ms     1 ms  10.xxx.xxx.147 
  2     2 ms     2 ms     2 ms  206.nnn.nnn.54 
  3     1 ms     1 ms     1 ms  10.zzz.zzz.2 

Trace complete.

And here's an abridged tracert from the non-working station:

Tracing route to 10.zzz.zzz.2 over a maximum of 30 hops

  1     1 ms     1 ms     1 ms  10.xxx.xxx.147 
  2     *        *        *     Request timed out.
  3     *        *        *     Request timed out.
 .
 .
 .
 29     *        *        *     Request timed out.
 30     *        *        *     Request timed out.

Trace complete.

Clearly some strange things are afoot on this network. I have been with this particular company for less than two weeks now, and this is the first I have seen of a 206.nnn.nnn.0 address.

As a side note, I tried running the non-working computer through the same network port that a working station was using, but still had no luck. At least that rules out a wiring issue, I guess? The above printouts were done while the computer was still plugged in to its original network port.

Again, any help or insight you guys can provide is extremely welcomed! Thank you!

FINAL EDIT:

Thank you to everyone who provided feedback on this issue; it is now resolved. I gave the non-working station a different IP and it was able to connect to the 10.zzz.zzz.0 subnet without any issues. Once I get settled into my position here at the company a bit more, I'll take a closer look at the ACL on the 10.xxx.xxx.147 device, as several of you suggested. Until then, everything that needs to talk to each other is talking to each other. Thanks again!

share|improve this question
    
How exactly does the route "not work"? Can you ping both gateways from 10.xxx.xxx.132? Does arp -av show the same gateway MAC addresses on 10.xxx.xxx.132 and 10.xxx.xxx.94? –  Ansgar Wiechers Sep 19 '12 at 20:29
    
are you sure that the traffic is not going to the 10.xxx.xxx.147 gateway, maybe is the problem with firewall rules on hosts or 10.xxx.xxx.147 machine, could you give pathping and traceroute to a 10.zzz.zzz.0 ip for working and non working machine –  Alen Sep 19 '12 at 20:31
    
I will get the info for both of you tomorrow morning. Thank you for the replies, I appreciate it! –  Dan Sep 19 '12 at 21:00
    
Do you have the screen shots reversed? –  joeqwerty Sep 20 '12 at 1:20
    
@Alen I added some additional information to the post. –  Dan Sep 20 '12 at 16:32

1 Answer 1

Try changing the metric on the default gateway for the system that is not working properly. I'd be interested to know if it helps as it appears to be the main difference between the systems:

Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 10.xxx.xxx.230 10.xxx.xxx.132 276 10.zzz.zzz.0 255.255.255.0 10.xxx.xxx.147 10.xxx.xxx.132 21

cmd> route change 0.0.0.0 mask 0.0.0.0 10.xxx.xxx.230 metric 20

share|improve this answer
    
Imo, I ran the command to assign a metric cost of 20, then did another route print. The metric showed up as 40 for that rule. I ran the command again and assigned it a value of 1, which caused it to have a cost of 21. I changed the metric for the persistent route to 2, so it now has a value of 22. Unfortunately, this has not changed how the computer behaves when attempting to reach a 10.zzz.zzz.0 address. –  Dan Sep 20 '12 at 15:53
    
It's not the routing table on the Windows 7 computer. Your pathping and tracert tests show the computer using the path to 10.xxx.xxx.147. –  joeqwerty Sep 20 '12 at 17:11

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.