I am troubleshooting a packet loss subject with my IT division and am all out of concepts. I at present have the layer 2 people blaming the layer 3 people and vice versa – I am simply the man caught within the center whose utility is not functioning appropriately. Here is my situation and am curious if something jumps out:
I just lately added Host B to a VLAN’d subnet. This gadget is experiencing 80% packet loss when pinging the Router. I assumed it was possibly a nasty cable, nevertheless, Host B is ready to ping current Host A very very reliably. So I then assumed possibly the router is malfunctioning, nevertheless, Host A to Router are in a position to ping very very reliably. Thus the problem appears to be very particular between the Router and the brand new Host B.
Host B is a Home windows 10 based mostly gadget. I’ve triple checked IPv4 settings and that the gateway handle is right. Nevertheless, the issue persists the place I am experiencing 80% packet loss whereas making an attempt to ping the Router. Moreover, the router experiences 80% packet loss when pinging Host B.
Like I stated, I initially wished accountable unhealthy Host B cable/{hardware}, nevertheless, if that was the case it shouldn’t be in a position to ping Host A as reliably as it’s. I’ve checked NIC settings on Host B. MTU measurement appears to be like wonderful, hyperlink standing appears to be like blissful, nevertheless, you may see the discarded obtain packets increment when working a netstat -e
Something bounce out? Sound like a layer 2 or layer 3 subject? Be aware – I haven’t got nice visibility into particular swap settings and VLANs. All I do know is that every little thing seems to be VLAN’d appropriately.
Signs Continued:
- From time to time when Host B is ready to ping Router, there’s an ARP entry made. Nevertheless, when the pings begin to fail I discover the ARP entry has disappeared. Is there a motive why the ARP entry would go lacking sometimes?