From the course: Troubleshooting Network Connectivity
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Duplicate addressing
From the course: Troubleshooting Network Connectivity
Duplicate addressing
- [Narrator] Having duplicate IPs on your network is a very vexing problem. They can be trouble shot fairly easily, but can also be avoided in some instances. Symptoms of a duplicate IP can vary. It often manifests as a user saying they can't access a resource, or very intermittent access to something. Normal trouble shooting would be to ping the client IP which will, generally, work consistently. When the client tries to ping out; however, he will see intermittent responses. This asymmetric behavior can be quite perplexing. In networking, one generally sees the same behavior to and from a host. The problem lies in the fact that since two devices have the same IP and I ping them from a different subnet, the router that directly terminates that subnet will arp for the MAC address of the IP owner. It doesn't matter which end device responds. The router will send to one of them and that device will respond back, so my pings will always get through. From the opposite perspective, if I'm…
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