dhcpv6 => relay, encapsulated vendor options discarded
Benoit Panizzon
benoit.panizzon at imp.ch
Thu Nov 29 10:52:58 UTC 2012
Hello World
After struggling with the ISC DHCP Server Version 4.2.4-P2 for a while, using
it in a DOCSIS Cable Network environment we had one of our developer look at
the isc code to find out why the needed suboptions (4419 containing 1026) are
always empty.
In a Cable Network the Flow of Events is as follows:
Customer CPE (receiving RA with 'statefull' flag)
Customer CPE (sending DHCPv6-Solicit Message
|
v
Customer Modem (Adding Encapsulated Vendor Option containing some information
needed to correctly provision that modem)
|
v
CMTS (DHCP Relay, Encapsulating the while package in a DHCPv6 Forward Relay
message)
|
v
ISC DHCP Server (Reading the encapsulated message and extracting only the
original DHCPv6 Solicit Message sent from the client. Discaring the viso
suboptions added by the Customer Modem).
- Is this a known Bug?
- Is this somehow intended behaviour?
- Is there a fix or patch for the issue?
And something I should probably not ask on this list?
- Does anyone know another DHCPv6 Server which gives access to those options?
Regards
Benoit Panizzon
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