dhclient6 negociation
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Authored by dereckson on Oct 13 2024, 11:08.

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	F3650699: dhclient6 negociation
	Oct 13 2024, 11:08

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	Starting dhclient6.
	Internet Systems Consortium DHCP Client 4.4.3-P1
	Copyright 2004-2022 Internet Systems Consortium.
	All rights reserved.
	For info, please visit https://www.isc.org/software/dhcp/

	Listening on Socket/igb0
	Sending on Socket/igb0
	Created duid […].
	PRC: Soliciting for leases (INIT).
	XMT: Forming Solicit, 0 ms elapsed.
	XMT: X-- IA_PD da:b3:39:6d
	XMT: \| X-- Request renew in +3600
	XMT: \| X-- Request rebind in +5400
	XMT: Solicit on igb0, interval 1030ms.
	XMT: Forming Solicit, 1090 ms elapsed.
	XMT: X-- IA_PD da:b3:39:6d
	XMT: \| X-- Request renew in +3600
	XMT: \| X-- Request rebind in +5400
	XMT: Solicit on igb0, interval 1980ms.
	RCV: Advertise message on igb0 from 2001:bc8:2::6:14:1.
	RCV: X-- Preference 255.
	RCV: X-- IA_PD da:b3:39:6d
	RCV: \| X-- starts 1728816827
	RCV: \| X-- t1 - renew +10800
	RCV: \| X-- t2 - rebind +172800
	RCV: \| X-- [Options]
	RCV: \| \| X-- IAPREFIX 2001:bc8:2e84:700::/56
	RCV: \| \| \| X-- Preferred lifetime 54000.
	RCV: \| \| \| X-- Max lifetime 86400.
	RCV: X-- Server ID: 00:01:00:01:27:c2:56:0a:52:54:00:ac:49:df
	RCV: Advertisement immediately selected.
	PRC: Selecting best advertised lease.
	PRC: Considering best lease.
	PRC: X-- Initial candidate 00:01:00:01:27:c2:56:0a:52:54:00:ac:49:df (s: 10105, p: 255).
	XMT: Forming Request, 0 ms elapsed.
	XMT: X-- IA_PD da:b3:39:6d
	XMT: \| X-- Requested renew +3600
	XMT: \| X-- Requested rebind +5400
	XMT: \| \| X-- IAPREFIX 2001:bc8:2e84:700::/56
	XMT: \| \| \| X-- Preferred lifetime +7200
	XMT: \| \| \| X-- Max lifetime +7500
	XMT: V IA_PD appended.
	XMT: Request on igb0, interval 940ms.
	RCV: Reply message on igb0 from 2001:bc8:2::6:14:1.
	RCV: X-- Preference 255.
	RCV: X-- IA_PD da:b3:39:6d
	RCV: \| X-- starts 1728816827
	RCV: \| X-- t1 - renew +10800
	RCV: \| X-- t2 - rebind +172800
	RCV: \| X-- [Options]
	RCV: \| \| X-- IAPREFIX 2001:bc8:2e84:700::/56
	RCV: \| \| \| X-- Preferred lifetime 7200.
	RCV: \| \| \| X-- Max lifetime 86400.
	RCV: X-- Server ID: 00:01:00:01:27:c2:56:0a:52:54:00:ac:49:df
	PRC: Bound to lease 00:01:00:01:27:c2:56:0a:52:54:00:ac:49:df.
	Prefix BOUND6 old= new=2001:bc8:2e84:700::/56

Event Timeline

igb0 is the right target interface

2001:bc8:2e84:700::/56 is the correct prefix for the DUID we send

The IP we assigned to the interface also belongs to that prefix:

ifconfig igb0
    inet6 2001:bc8:2e84:700::da7a:7001 prefixlen 56

To make it works:

Flush route table to remove all gateway info and different tests route -6 flush
Enable route advertisement: ifconfig igb0 accept_rtadv`
Ping something: route -6 google.com: at that moment, we've an autoconfigured IP (not the SLAAC!) and a routing table

The block then works nicely.

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Event Timeline

dhclient6 negociation
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