Roland Dreier wrote:
> After this patch, do we end up with
> an IPoIB interface that's not a member of the all hosts multicast group?
> (That seems like it would lead to confusing breakage later)
>
In my search for a solution to the issue with bonding I found the answer for
this.
I checked what will be the affect of delaying the decision of what is the
device type
until first the slave comes. This causes arp_mc_map() to fail and the address
is
not added to the mc list. On the other hand, the IPoIO will be a member of all
hosts
because dev_open()) does that for any net device that it is called for (see
below).
linux-ck8g:/root # ip m s dev ib0
16: ib0
link 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:00:00:00:fb
link 00:ff:ff:ff:ff:12:60:1b:ff:ff:00:00:00:00:00:01:ff:98:2f:c5
link 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:00:00:00:01 users
2
link 00:ff:ff:ff:ff:12:60:1b:ff:ff:00:00:00:00:00:00:00:00:00:01 users
2
inet 224.0.0.1
inet6 ff02::1
However, there is a side affect. The bonding interface will be registered only
to the inet
address of all hosts but not to the link address. This is until dev_open is
called again (see
below again)
linux-ck8g:/root # ip m s dev bond0
18: bond0
link 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:00:00:00:fb
link 00:ff:ff:ff:ff:12:60:1b:ff:ff:00:00:00:00:00:01:ff:98:2f:c5
inet 224.0.0.251
inet 224.0.0.1
inet6 ff02::1:ff98:2fc5
inet6 ff02::1
linux-ck8g:/root # ifconfig bond0 down
linux-ck8g:/root # ifconfig bond0 up
linux-ck8g:/root # ip m s dev bond0
18: bond0
link 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:00:00:00:fb
link 00:ff:ff:ff:ff:12:60:1b:ff:ff:00:00:00:00:00:01:ff:98:2f:c5
link 00:ff:ff:ff:ff:12:60:1b:ff:ff:00:00:00:00:00:00:00:00:00:01
link 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:00:00:00:01
inet 224.0.0.251
inet 224.0.0.1
inet6 ff02::1:ff98:2fc5
inet6 ff02::1
linux-ck8g:/root #
I don't want to leave it like that but just for curiosity, it is bad that the
bond interface is not registered to the all hosts group if its slave is?
thanks
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