robroth
join:2005-04-16
Newburyport, MA
| ZW35 to ZW35 VPN packet loss while VPN is up
I recently set up a site to site VPN and am having an intermittent connectivity issue and I'm not sure how to troubleshoot this. There is nothing in the logs and the VPN never goes down during the loss. On 7/17, I upgraded both routers to the latest firmware - V4.04(WZ.1) | 06/26/2008.
These next tests were all done within 30 seconds. I'm pinging from Richmond (192.168.1.0/24) to Boston (192.168.10.0/24).
NetBIOS over TCP/IP through the VPN is enabled. \\PDC is the netbios name of one of the servers back in my Boston office.
C:\>ping pdc
Pinging pdc [192.168.10.200] with 32 bytes of data:
Reply from 192.168.10.200: bytes=32 time=46ms TTL=126
Reply from 192.168.10.200: bytes=32 time=42ms TTL=126
Reply from 192.168.10.200: bytes=32 time=89ms TTL=126
Reply from 192.168.10.200: bytes=32 time=43ms TTL=126
Ping statistics for 192.168.10.200:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 42ms, Maximum = 89ms, Average = 55ms
C:\>ping 192.168.10.200
Pinging 192.168.10.200 with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 192.168.10.200:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
C:\>ping pdc
Pinging pdc [192.168.10.200] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 192.168.10.200:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
5 minutes later......
C:\>tracert -d 192.168.10.200
Tracing route to 192.168.10.200 over a maximum of 30 hops
1 1 ms 1 ms 1 ms 192.168.1.1
2 * * * Request timed out.
3 47 ms 48 ms 45 ms 192.168.10.200
Trace complete.
C:\>ping 192.168.10.200
Pinging 192.168.10.200 with 32 bytes of data:
Reply from 192.168.10.200: bytes=32 time=45ms TTL=126
Reply from 192.168.10.200: bytes=32 time=52ms TTL=126
Reply from 192.168.10.200: bytes=32 time=43ms TTL=126
Reply from 192.168.10.200: bytes=32 time=44ms TTL=126
Ping statistics for 192.168.10.200:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 43ms, Maximum = 52ms, Average = 46ms
I tried this same experiment with the remote gateway as well to eliminate the unlikely scenario where it was a problem with the remote server. The SA monitor shows the VPN as up.
C:\>ping 192.168.10.1
Pinging 192.168.10.1 with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 192.168.10.1:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
30 seconds later it worked again. |
