HUBs and IP address Conflict

RAMU CH
RAMU CH used Ask the Experts™
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Hi,

How HUBs detect the IP address conflict?What is the Internal Mechanism as HUBs are Layer 1 device and How systems will get IP address conflict messages if those are connected to HUB.Will
ARP protocol works in HUB?

Regards
Ramu
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Commented:
Hubs are dumb networking devices. Dumb in the meaning that it does nothing with controlling the network traffic. It receives data and passes it out on all ports. A hub has no way to detect an IP address conflict.
Hi,

The hub doesn't play a part of IP address conflict detection.

This is normally done by the operating system. For example a Windows PC will send a gratitous ARP stating that it is going to be using a particular IP address. If another device responds it knows that another device is using that address and flags an address conflict.

Commented:
@Ram
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Commented:
In OSI layer ARP describes between Layer 2 & 3 though ARP was not developed in OSI. HUB can't detect IP because it is Layer1 device.However IPv4 conflicts describes under RFC 5227.Please check the following URL specially 2.1.1.  Probe Details section.

http://tools.ietf.org/html/rfc5227#page-10

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