Multiple trace route sources for what I do is very helpful, for example:
A client reports an issue that some of their website visitors are having packet loss/reachability issues, however the network I am working on has 3 transit providers, which means 3 different ways into the network.
I can certainly do a trace route from my machine or routers to their clients (if i know their IP) but that's only showing me the outbound route, I am still none the wiser as to which route they are trying to get in via.
By using multiple off-net trace routes I can probably enter my core network over each of the 3 transit providers. Looking at these results I should be able to see if there are any obvious issues with incoming traffic.
It's certainly not going to work every time, however it will give me a better view as to what's going on.
A client reports an issue that some of their website visitors are having packet loss/reachability issues, however the network I am working on has 3 transit providers, which means 3 different ways into the network.
I can certainly do a trace route from my machine or routers to their clients (if i know their IP) but that's only showing me the outbound route, I am still none the wiser as to which route they are trying to get in via.
By using multiple off-net trace routes I can probably enter my core network over each of the 3 transit providers. Looking at these results I should be able to see if there are any obvious issues with incoming traffic.
It's certainly not going to work every time, however it will give me a better view as to what's going on.