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TOPIC: Diffrence bewteen routers and Bridges.

Diffrence bewteen routers and Bridges. 10 years 3 months ago #15246

  • MANPAP
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Hi,

I have a lan connected to a bridge.... on my wire i have packets which have 10 diffrent IP address and mac address( say 1 IP address and 1 Mac address in a packet) including a packet with a broadcasr address.
This is intercepted by a bridge how does it behave.... i


similar situation, i have 10 packets diffrent Ip and mac address ( including a broad cast address) intercepted by router.. how does, it behave....

Will router process all the 10 packets ...?

Thanks in advace.

-Manjunath.
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Re: Diffrence bewteen routers and Bridges. 10 years 3 months ago #15252

  • jwj
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A bridge is just going to send any frames it receives out all ports except the one it received it on. A router will examine the IP destination, and forward it based on it's routing table. Also, a router does not forward broadcasts unless a broadcast relay (also known as IP helper) is configured. The IP helper will actually make the broadcast into an unicast.
-Jeremy-
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Question 10 years 3 months ago #15262

  • TheBishop
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As jwj says, the bridge won't bother about the IP addresses it sees in the packets; it is only interested in whether or not to forward each Ethernet frame because it is only a layer 2 device. The router, on the other hand, uses the IP address to make its routing decision as it is a layer 3 device
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