Red Hat Bugzilla – Bug 495576
IPv6 multicast scoping not working
Last modified: 2009-04-22 17:08:34 EDT
Description of problem:
Multicasting to the IPv6 node-local multicast address ff01::1 causes multicast packets to be transmitted across node boundaries.
Version-Release number of selected component (if applicable):
Linux localhost.localdomain 184.108.40.206-57.fc8 #1 SMP Thu Dec 18 19:19:45 EST 2008 i686 i686 i386 GNU/Linux
Steps to Reproduce:
I'm using the IPv6 multicast utilities associated with and attached to Bug 231899.
On a two host LAN with hosts A and B:
1. run ./mcreceive6 ff01::1:2:3 1444 eth0 on host A
2. run ./mcsend6 ff01::1:2:3 1444 on host B
3. type in some characters and press enter at the prompt on Host B
Multicast packets with destination ff01::1:2:3 arrive at host A.
Multicast packets with destination ff01::1:2:3 do not leave host B
With wireshark enabled, I see very different sets of messages exchanged when multicasting to ff02:: and ff01:: - ff02:: scoped multicasting generates ICMPv6 Multicast Listener Reports on join and leave, whereas ff01:: scoped multicasts do not.
Thank you for your bug report.
We are sorry, but the Fedora Project is no longer releasing bug fixes or any other updates for this version of Fedora. This bug will be set to CLOSED:WONTFIX to reflect this, but please reopen it if the problem persists after upgrading to the latest version of Fedora, which is available from: