Re: [Babel-users] cornercase issue (link sensing)

2009-04-29 Thread Harald Geyer
> > - Especially vlan setups often use the same mac address on many > > interfaces. > > If there's a MAC address collision in a single broadcast domain, > duplicate address detection at the IPv6 layer should disable one of the > two interfaces. (Or both, if there's a race condition.) Well I pl

Re: [Babel-users] cornercase issue (link sensing)

2009-04-29 Thread Henning Rogge
On Mittwoch 29 April 2009 20:51:38 Juliusz Chroboczek wrote: > > Theoretically two nodes in "two-hop" range might get the same linklocal > > IP, because they don't share a link, but the node between them would be > > in trouble. > > Yep. A possible workaround would be to assign random IPv6 interfa

Re: [Babel-users] cornercase issue (link sensing)

2009-04-29 Thread Juliusz Chroboczek
> Theoretically two nodes in "two-hop" range might get the same linklocal IP, > because they don't share a link, but the node between them would be in > trouble. Yep. A possible workaround would be to assign random IPv6 interface-ids to the interfaces. (There's 62 bits of randomness in a local

Re: [Babel-users] cornercase issue (link sensing)

2009-04-29 Thread Henning Rogge
On Mittwoch 29 April 2009 19:11:32 Juliusz Chroboczek wrote: > Sorry to follow-up on myself. > > > In version 2, the neighbour is identified with the link-local IPv6 > > address, so multiple adjacencies between the same two nodes are okay. > > Just to be clear: there is no issue at all with conflic

Re: [Babel-users] cornercase issue (link sensing)

2009-04-29 Thread Juliusz Chroboczek
Sorry to follow-up on myself. > In version 2, the neighbour is identified with the link-local IPv6 > address, so multiple adjacencies between the same two nodes are okay. Just to be clear: there is no issue at all with conflicting routable addresses. If two neighbours on the same link have the s

Re: [Babel-users] cornercase issue (link sensing)

2009-04-29 Thread Juliusz Chroboczek
Hi Harald, > I believe I found an issue that might lead to unstable links in the > corner case of two interfaces sharing the same broadcast domain: > Since hellos on different interfaces are sent with different > sequence numbers peer nodes might get very confused. Babel version 1 had this proble

[Babel-users] cornercase issue (link sensing)

2009-04-28 Thread Harald Geyer
Hi! I believe I found an issue that might lead to unstable links in the corner case of two interfaces sharing the same broadcast domain: Since hellos on different interfaces are sent with different sequence numbers peer nodes might get very confused. - Especially vlan setups often use the same mac