Dear Friends,
This time I am stuck with one complex issue. So please tell me if you can help me with this.
Here is my issue and network setup:
Traffic Flow -> Broadband Customers -> Subscriber Module -> Access Point -> Backhaul Device (remote side) -> Backhaul Device (Our ISP end) -> Cisco Switch (3560)
On 3560 Switch -> Port 1,2 and Port 3 for example are in same vlan --> VLAN 5
Port 1 is connected to Backhaul device (ISP end)
Port 2 is connected to My laptop running windows os
Port 3 is connected to Laptop running Debain Linux
Now all Access Points and Backhaul devices are running on 172.25.x.x network
My Windows Laptop has IP 172.25.0.253
Laptop running Linux has got IP 172.25.0.230
From Backhaul to Backhaul we are using 5.8 Ghz band and from AP to SM we are using 2.4 Ghz band
.................................................................................
Issue -
When I ping any backhaul or access point, sitting right on my Windows laptop, I get one reply and then RTO starts coming. After that if I clear windows arp manually using arp -d command on command prompt. And tries to ping same destination again, I starts getting replies and some times again I faces same issue of one reply and other RTO. Also sometimes replies keeps coming back and than after 10-15 mins or so, again RTO..So I have to again clear windows arp manually.
At the same time if I ping any Backhaul or AP from Linux laptop, I dont get any RTO or drop. Which is very strange.
Now the things I have tried till now are following:
1. Connected diff windows laptop on port 2 but no luck
2. Connected Windows laptop on port 3 , where Linux pc was connected....still no luck
3. Changed port for Windows laptop like port 10 which is again in same vlan.....no luck
4. Ok finally I changed the 3560 switch and put a 3550 with same vlan configuration.....no luck
5. connected linux laptop on port 2..hmmm...it still pings everthing without even a single drop
Few days back...everything was working fine....but I dont know when this all started off. I only came to know when I saw our NMS running on Windows machine is showing our lots of Backhaul and APs as down. So I tried to ping those devices from Linux pc and It ping those without any drop
Just for you sake...We have so many APs and Backhaul Devices...and issue is with all of them almost while pinging.
Also problem can not be with MTU as I tried with varius machines. Its also not arp issue related on Windows...
So please suggest something ....
Thanks & Best Regards,
Deepak Arora
C:\Documents and Settings\Administrator>ping 172.25.10.43
Pinging 172.25.10.43 with 32 bytes of data:
Reply from 172.25.10.43: bytes=32 time=2ms TTL=30
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 172.25.10.43:
Packets: Sent = 4, Received = 1, Lost = 3 (75% loss),
Approximate round trip times in milli-seconds:
Minimum = 2ms, Maximum = 2ms, Average = 2ms
C:\Documents and Settings\Administrator>arp -d
C:\Documents and Settings\Administrator>tracert 172.25.10.43
Tracing route to 172.25.10.43 over a maximum of 30 hops
1 1 ms 1 ms 1 ms 172.25.10.43
Trace complete.
C:\Documents and Settings\Administrator>ping 172.25.10.43
Pinging 172.25.10.43 with 32 bytes of data:
Reply from 172.25.10.43: bytes=32 time<1ms TTL=30
Reply from 172.25.10.43: bytes=32 time=1ms TTL=30
Reply from 172.25.10.43: bytes=32 time<1ms TTL=30
Reply from 172.25.10.43: bytes=32 time=1ms TTL=30
Ping statistics for 172.25.10.43:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
After 5 mins…
C:\Documents and Settings\Administrator>ping 172.25.10.43
Pinging 172.25.10.43 with 32 bytes of data:
Reply from 172.25.10.43: bytes=32 time=1ms TTL=30
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 172.25.10.43:
Packets: Sent = 4, Received = 1, Lost = 3 (75% loss),
