1
First things first, this is not an issue with the network, this is an issue with my laptop.
For the last several months I have been unable to reach any computers or local intranet websites in 172.x.x.x subnets. I'm a VoIP consultant and constantly work inside various enterprise networks and have experienced this issue on more than one separate customer network.
As far as I can tell nothing changed on my laptop, and I've even gone as far as re-installing Windows.
This is an example of my issue, I am unable to reach a server web GUI with the IP 172.23.232.22 or any other IP addresses in that subnet.
- I've tried creating a persistent route to this subnet, no luck.
- This issue seems to effect every Network adapter, wired, wireless, even over VPN.
- I've monitored my test pings via Wireshark and they seem to go to a black hole, I never see any ICMP packets when pinging any 172.x.x.x subnet
- I have been able to successfully reach a class B network by starting a VM, bridging my Ethernet connection to the VM, so it is something specific to this OS.
Here is some detailed info and troubleshooting:
Ping 172.23.232.22
Pinging 172.23.232.22 with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 172.23.232.22:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
Tracert 172.23.232.22
Tracing route to 172.23.232.22 over a maximum of 30 hops
1 * * * Request timed out.
2 * * * Request timed out.
3 * * * Request timed out.
Wireless LAN adapter Wi-Fi:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) Centrino(R) Advanced-N 6205
Physical Address. . . . . . . . . : 84-3A-4B-05-99-3A
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 10.23.75.136(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.254.0
Lease Obtained. . . . . . . . . . : Thursday, January 8, 2015 9:30:56 AM
Lease Expires . . . . . . . . . . : Friday, January 16, 2015 11:23:15 AM
Default Gateway . . . . . . . . . : 10.23.74.1
DHCP Server . . . . . . . . . . . : 1.1.1.1
DNS Servers . . . . . . . . . . . : 192.168.13.24
NetBIOS over Tcpip. . . . . . . . : Enabled
Route Print
Interface List
15...00 ff 88 18 04 70 ......TAP-Windows Adapter V9
13...54 2e 81 6f 94 10 ......Check Point Virtual Network Adapter For Endpo
PN Client
12...86 3a 4b 05 99 3a ......Microsoft Hosted Network Virtual Adapter
7...20 68 9d 2a d8 5e ......Bluetooth Device (Personal Area Network)
5...84 3a 4b 05 99 3b ......Microsoft Wi-Fi Direct Virtual Adapter
4...84 3a 4b 05 99 3a ......Intel(R) Centrino(R) Advanced-N 6205
3...3c 97 0e 58 ec 4d ......Intel(R) 82579LM Gigabit Network Connection
9...00 50 56 c0 00 01 ......VMware Virtual Ethernet Adapter for VMnet1
11...00 50 56 c0 00 08 ......VMware Virtual Ethernet Adapter for VMnet8
1...........................Software Loopback Interface 1
32...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #4
31...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #14
44...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #15
===========================================================================
IPv4 Route Table
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 10.23.74.1 10.23.75.136 25
10.23.74.0 255.255.254.0 On-link 10.23.75.136 281
10.23.75.136 255.255.255.255 On-link 10.23.75.136 281
10.23.75.255 255.255.255.255 On-link 10.23.75.136 281
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
192.168.26.0 255.255.255.0 On-link 192.168.26.1 276
192.168.26.1 255.255.255.255 On-link 192.168.26.1 276
192.168.26.255 255.255.255.255 On-link 192.168.26.1 276
192.168.164.0 255.255.255.0 On-link 192.168.164.1 276
192.168.164.1 255.255.255.255 On-link 192.168.164.1 276
192.168.164.255 255.255.255.255 On-link 192.168.164.1 276
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 10.23.75.136 281
224.0.0.0 240.0.0.0 On-link 192.168.26.1 276
224.0.0.0 240.0.0.0 On-link 192.168.164.1 276
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 10.23.75.136 281
255.255.255.255 255.255.255.255 On-link 192.168.26.1 276
255.255.255.255 255.255.255.255 On-link 192.168.164.1 276
===========================================================================
Persistent Routes:
None
IPv6 Route Table
Active Routes:
If Metric Network Destination Gateway
1 306 ::1/128 On-link
11 276 fe80::/64 On-link
9 276 fe80::/64 On-link
9 276 fe80::967:4aa2:ae4b:3c55/128
On-link
11 276 fe80::50c9:810b:5d06:c4a5/128
On-link
1 306 ff00::/8 On-link
9 276 ff00::/8 On-link
11 276 ff00::/8 On-link
===========================================================================
Persistent Routes:
None
Any ideas?
Phill Johntony
Posted 2015-01-09T14:10:07.540
Reputation: 11
What command, exactly, did you use to create a persistent route? – James – 2015-01-09T14:22:03.400
Something like this. I've done direct routes to that IP, and routes to that IP's subnet.
It strikes me as a little odd that your gateway hop doesn't show up in the tracert. Also your DHCP server of 1.1.1.1 is very odd? – Ƭᴇcʜιᴇ007 – 2015-01-09T14:44:57.837
Completely agree it is odd, it doesn't show that in the tracert, the packets don't show in Wireshark, some blackhole its it. Nevermind the DHCP, there was a second DHCP server that got cut off. I'm adding it now. – Phill Johntony – 2015-01-09T14:46:51.630