Bug 203243

Summary: "peth0 received packet on own address" seen in normal config of Xen
Product: [Fedora] Fedora Reporter: Russell McOrmond <russell>
Component: xenAssignee: Herbert Xu <herbert.xu>
Status: CLOSED DUPLICATE QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 5CC: bstein, katzj, mcr
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
URL: http://lists.xensource.com/archives/html/xen-devel/2006-04/msg01305.html
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2006-09-18 12:13:19 EDT Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Description Russell McOrmond 2006-08-19 14:42:57 EDT
Description of problem:

If you run more than one Xen on the same LAN there is a conflict between the use
of a static HW address for peth0 and the ICMPv6 Neighbor
Solicitation that happens for IPv6.

You can read a description of the problem at

  I believe the solution would be to have the default Xen scripts that set up
peth0 and the various vif?.0 interfaces to configure them without IPv6 enabled
on those interfaces.  I don't want to globally turn off IPv6 for other
interfaces, just for those set up by Xen that would otherwise be duplicates.

Bug also discussed in http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=339
It would be great if the "External Bugzilla" part of this form would also be
able to link to Xensource.
Comment 1 Michael Richardson 2006-09-16 09:03:00 EDT
if we can't prevent the IPv6 link-local address from being auto-configured,
then we need to make sure that the MAC given to peth0 is unique. My suggestion
is that the 10:00:00 OUI is a "local use" OUI, and that we set the MAC to:

10:00:00:XX:YY:ZZ, where XX,YY,ZZ are the local three octets of the IPv4. That
ought to be unique on the local LAN, assuming that there are no duplicate IPv4,
and assuming that there aren't multiple /8's with overlapping addresses.
Comment 2 Russell McOrmond 2006-09-16 15:42:02 EDT
While not a long-term solution (I like Mike Richardson's suggestion), I wanted
to post a note about what I did to get rid of the messages on my own LAN.

In /etc/rc.d/rc.local  I have added the following lines:

ip addr del fe80::fcff:ffff:feff:ffff/64 dev peth0
ip addr del fe80::200:ff:fe00:0/64 dev xenbr0
Comment 3 Daniel Berrange 2006-09-18 10:06:20 EDT
> It would be great if the "External Bugzilla" part of this form would also be
> able to link to Xensource.

FYI, the XenSource bugzilla is now available in the drop-down.
Comment 4 Herbert Xu 2006-09-18 12:13:19 EDT

*** This bug has been marked as a duplicate of 200360 ***