Tag: forwarding

Home forwarding

31

Mar2014

What is DHCP Relay/ IP-Helper-Address?

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Dynamic Host Configuration Protocol (DHCP) relay is used to forward DHCP client's broadcast request, DHCPDiscover, from one VLAN to the DHCP server's VLAN.  This request forwarding is done by the local router gateway of the DHCP client. The broadcast is not forwarded by routers, but configured with DHCP relay, the ... Read More
March 31, 2014Praveen Bahethi

26

Dec2013

How is traffic forwarded at Layer 2 of the OSI model?

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Switches register the source MAC address seen on their ports to generate a MAC address table also known as Content Addressable Memory (CAM) table.   A MAC address table has the source MAC address the port that learned it a timer to aging out the VLAN the source MAC address belongs to When a switch ... Read More
December 26, 2013Praveen Bahethi