Traceroute shows you every hop your traffic takes, the latency at each one, and where things go wrong. MCS goes further: it traces the route in both directions, revealing the return path that standard tools can't see.
Between your user and your application, traffic passes through routers, switches, ISP networks, peering exchanges, and cloud provider edges. Each hand-off is a potential bottleneck. When latency spikes or packets start dropping, the problem could be at any one of those points.
Without traceroute data, troubleshooting is guesswork. You call the ISP. They say the problem isn't on their network. The cloud provider says the same. Traceroute gives you the evidence to point at the exact hop where performance degrades.
When your traffic leaves your network, it enters your ISP's. From there it may pass through one or more transit providers, hit an Internet Exchange Point (IXP), and eventually reach the destination network. Each of these hand-offs is a peering point, and each one is a place where performance can degrade.
Peering congestion is especially common during peak hours. Two networks may have a direct interconnect rated at a fixed capacity, and when traffic volume exceeds it, packets queue, get delayed, or get dropped. The user experiences this as sudden latency, jitter, or loss, and neither ISP will acknowledge the problem without evidence.
MCS traceroute reveals every hop, including the peering exchanges where traffic changes hands. You can see the hostname and IP of each router, the latency at each hop, and the exact point where latency spikes. When you can show your ISP that their peering link to a transit provider adds 40ms at hop 7, the conversation changes.
A standard traceroute only shows the forward path: from you to the destination. MCS traces both directions, revealing the return path that your data actually takes coming back. This is critical because the two paths are often completely different.
MCS sends ICMP packets with incrementing TTL values from the client to the destination, recording each router that responds. This is the standard traceroute: your traffic's outbound journey through your ISP, transit providers, and peering exchanges to the endpoint.
MCS simultaneously runs a traceroute from the destination back to the client. This reveals the return route, which may traverse entirely different networks, peering points, and geographic paths. A problem on the return path causes latency and loss that a forward-only trace will never detect.
With both paths visible, you can identify asymmetric routing, pinpoint which direction is degraded, and determine whether the issue is on your network, your ISP's, or the destination's. This turns "the connection is slow" into a specific, provable diagnosis.
MCS traceroute provides detailed information at each point along the route, giving you the data to diagnose problems and hold providers accountable.
The IP address and hostname of every router your traffic passes through, from source to destination and back.
Round-trip time at each point in the path. See exactly where latency is introduced and how much each hop adds.
Identify which ISP, transit provider, or cloud network owns each hop. Know whose infrastructure is responsible for degradation.
See where traffic crosses from one network to another. Peering congestion shows up as a latency jump at the hand-off point between two providers.
Identify routers that are dropping packets. Distinguish between a router that's too busy to respond to ICMP and one that's actually losing production traffic.
Compare the forward and reverse paths side by side. Asymmetric routing is common and can cause one-directional quality problems that are invisible to standard tools.
Hostnames and IP geolocation often reveal the physical path. Catch routing inefficiencies like traffic going coast-to-coast when the destination is nearby.
Schedule automated traceroutes and compare results over hours, days, or weeks. Detect when your ISP changes routing, and whether the new path is better or worse.
The total number of network devices between source and destination. More hops generally means more latency and more opportunities for loss.
Calls have jitter and packet loss but the local network looks fine. Traceroute reveals congestion at a transit provider's peering exchange three hops upstream, proving the issue is outside your control.
Your ISP says the problem isn't on their network. Traceroute data shows latency doubling at their border router before traffic enters the transit provider. You now have evidence for an SLA claim.
After switching carriers or enabling SD-WAN, performance drops. Traceroute reveals the new path takes 4 extra hops through a different continent. You can revert or optimize the routing policy with proof.
Performance is fine in the morning but degrades every afternoon. Automated traceroutes show that at 2pm, your ISP's peering link to the cloud provider becomes saturated. The path doesn't change, but the latency at hop 5 triples.
