Recently I was troubleshooting a network event for a client of our who resides on the Level3 network. While trying to verify the path, I noticed I am no longer able to traceroute through the Level3 network.
The funny thing is this is not just isolated to the /32. It appears to be that the entire 4.0.0.0/9 network is no longer able to traceroute through. Everything dies on their edge network.
This appears to be isolated to traceroute. I have check this in NA and EU.
My carrier contacted Level3 who pretty much stated that they can’t provide anything.
I have checked multiple looking glasses and other online tools and none of them make it. Even Level3 looking glass drops the packets.
Does anyone know anything about this? I’m pretty sure this is the first time we are seeing this.
I’m seeing the same thing across our Level 3 circuits, even if the traffic never leaves their network. This was not the case as recently as two days ago when I had a reachability ticket open with them. My SE says they’re having an internal issue that’s being worked on; didn’t provide detail.
I am able to traceroute in and out of Level3, but it seems like some L3 internal hops are missing, as I appear to go straight from the L3 edge router to my L3 customer agg router: