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Tuesday, October 23, 2018

DHCP Server and unnecessary traffic for your DHCP server.

Have you ever implemented central DHCP server for all of your network (VLANS), and you used a command "IP Helper-Address? The ip helper-address will actually forward many other UDP-based broadcasts to the address specified as tft, dns, time, netbios-ns, netbios-dgm, tacacs, bootpc, bootps etc. 

Many times it is generating unnecessary traffic for your DHCP server. Have you applied "ip forward-protocol udp ...." command to prevent this?

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