[dhcwg] regarding the relay agents, VPN Devices and broadcast bit

Vivek Dadu <vdadu@microsoft.com> Mon, 20 January 2014 13:54 UTC

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From: Vivek Dadu <vdadu@microsoft.com>
To: "dhcwg@ietf.org" <dhcwg@ietf.org>
Thread-Topic: regarding the relay agents, VPN Devices and broadcast bit
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Date: Mon, 20 Jan 2014 13:53:07 +0000
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Subject: [dhcwg] regarding the relay agents, VPN Devices and broadcast bit
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Hi All
I have a query regarding a scenario concerning option 118. Here it goes

"Say a VPN device acting as a dhcp proxy on behalf of its VPN clients has an ip address and belongs to subnet, however it wants to assign the ip address belonging to subnet to one of its VPN clients, so it sends the subnet selection option 118 filled with the data and subnet mask filled with data as a result a relay agent receives it and forwards to dhcpserver, the dhcp server unicasts the packet to the relay agent, now will the relay agent need a special setting to tell it that packets destined to subnet will be sent on interface"
Also would like to know that will the broadcast bit on packet based on which the server decides to broadcast or unicast a response packet have any impact on the way relay agent processes the packet.