Bug 11697 – Does not pickup IPv6 neighbour advertisements

Bug 11697 - Does not pickup IPv6 neighbour advertisements


Summary:	Does not pickup IPv6 neighbour advertisements

Status:	UNCONFIRMED

Product:	Community Kernels
Component:	General
Version:	unspecified
Platform:	N900 Maemo

Importance:	Unspecified normal (vote)
Target Milestone:	---
Assigned To:	unassigned
QA Contact:	general

URL:
Keywords:

Depends on:
Blocks:
	Show dependency tree

Reported:	2010-12-16 18:05 UTC by maemo.yuri
Modified:	2010-12-23 12:01 UTC (History)
CC List:	1 user (show)

See Also:

Attachments
Tcpdump while trying to ping device (24.55 KB, application/octet-stream) 2010-12-17 11:53 UTC, maemo.yuri	Details
Add an attachment (proposed patch, testcase, etc.)

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Description maemo.yuri (reporter) 2010-12-16 18:05:33 UTC

SOFTWARE VERSION: 2.6.18.10power46

IPv6 works at home as expected (6-over-4 tunnel). At work it does not (native
IPv6).

Case: I ping6 from my phone to my desktop (or the other way around)

What I see with tcpdump, on both devices:

desktop > phone:   echo request
phone > broadcast: IP6 Neighbour Solicitation
desktop > phone:   IP6 Neighbour Advertisement
phone > broadcast: IP6 Neighbour Solicitation
desktop > phone:   IP6 Neighbour Advertisement
...
desktop > phone:   echo request
phone > broadcast: IP6 Neighbour Solicitation
desktop > phone:   IP6 Neighbour Advertisement
phone > broadcast: IP6 Neighbour Solicitation
desktop > phone:   IP6 Neighbour Advertisement
...
desktop > broadcast: IP6 Neighbour Solicitation <-----
phone > desktop:   IP6 Neighbour Advertisement
desktop > phone:   echo request
phone > desktop:   echo reply

So it seems the phone does not actually process the advertisements, but it does
use the solicitation to fill its cache. So only when the desktop refreshes its
cache the phone manages to send data for a short while, 10 seconds or so.

REPRODUCIBILITY: Always

Comment 1 maemo.yuri (reporter) 2010-12-17 11:53:39 UTC

Created an attachment (id=3249) [details]
Tcpdump while trying to ping device

Dump while pinging phone from desktop.

- first 9 seconds unsuccessful neighbor discovery.
- desktop solicitation
- 5 seconds successful ping
- 45 seconds unsuccessful neighbor discovery.
- desktop solicitation
- 5 seconds successful ping
- Continuing neighbor discovery.