IP Helper on WAN/LAN

Answered Question
Apr 14th, 2010
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Hello,


I have the scenario attached, this scenario the wan is frame-relay


My question is how can a DHCP server remote identify what POOL of IP address to use?


I know I can use a local dhcp server, even the router as dhcp server,  but the centralized dhcp is a requirement :/


IP Helper.JPG

Correct Answer by shailesh.h about 7 years 2 months ago

i think attached document will provide you more information


http://h40060.www4.hp.com/procurve/uk/en/pdfs/5300xl_dhcp_relay.pdf


Shailesh

Correct Answer by paolo bevilacqua about 7 years 2 months ago

It know because the router insers GW address in the request packet.


Be aware that when WAN is down, the "requirement" becomes a major hinderance, and everyone gets very angry.

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Correct Answer
paolo bevilacqua Wed, 04/14/2010 - 05:38
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It know because the router insers GW address in the request packet.


Be aware that when WAN is down, the "requirement" becomes a major hinderance, and everyone gets very angry.

Rodrigo Gurriti Wed, 04/14/2010 - 05:52
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For instance,


Will F1 forward the dhcp discovery from a workstation to the DHCP server using as source address F1's local ethernet? Is that how it knows ? or is there a option that it uses ?



Thank you!

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