Try the "vpn" keyword. That's how you change this behaviour with JunosES at least, haven't got a EX to test on now but possibly the same.
set forwarding-options helpers bootp ? Possible completions: + apply-groups Groups from which to inherit configuration data + apply-groups-except Don't inherit configuration data from these groups client-response-ttl IP time-to-live value to set in responses to client (1..255) description Text description of servers > interface Incoming BOOTP/DHCP request forwarding interface > configuration maximum-hop-count Maximum number of hops per packet (1..16) minimum-wait-time Minimum number of seconds before requests are forwarded (0..30000) relay-agent-option Use DHCP Relay Agent option in relayed BOOTP/DHCP messages > server Server information vpn Enable vpn encryption Regards Daniel -----Original Message----- From: Phil Mayers [mailto:[email protected]] Sent: 09 March 2009 12:03 To: [email protected] Cc: [email protected] Subject: Re: [j-nsp] JUNOS BootP-relay Behaviour [email protected] wrote: > When I configure DHCP relay like this on an EX switch: > > "set forwarding-options helpers bootp interface XX server @IPDHCPserver" > > The outgoing relayed paquets are received on the DHCP server with a > source address > of the outgoing interface of the EX switch (the Net IP.B address) > > __________ > _______ { } > Net IP.A | | Net IP.B { } > DHCP client |----------| EX SW |----------{ NET }--| DHCP > server > |_______| { } > {__________} > > > > On a C router and other brands the behaviour is different and the > address used > is the one from the incoming interface (the Net IP.A address) We see this too, but why does it matter? DHCP servers are required to inspect the "giaddr" field in the BOOTP/DHCP header, not the source of the IP packet. ---------------------------------------------------------------------------------------------------------- Synetrix Holdings Limited Tel: +44 (0)1252 405 600 www.synetrix.co.uk Synetrix (Holdings) Limited is a limited company registered in England and Wales. Registered number: 0349 1956. VAT number: GB776 1259 07. Registered office: Synetrix House, 49-51 Victoria Road, Farnborough, Hampshire, GU14 7PA. IMPORTANT NOTICE: This message is intended solely for the use of the Individual or organisation to whom it is addressed. It may contain privileged or confidential information. If you have received this message in error, please notify the originator immediately. If you are not the intended recipient, you should not use, copy, alter, or disclose the contents of this message. All information or opinions expressed in this message and/or any attachments are those of the author and are not necessarily those of Synetrix Holdings Limited. Synetrix Holdings Limited accepts no responsibility for loss or damage arising from its use, including damage from virus. _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
