Re: [tipc-discussion] Request: Unable to config second node onsame machine

[Stephens, A. <all...@wi...>]

Naresh wrote: 

> Because of the Duplication of nodes the network connection 
> was not established.
> continuously kernel msg are pop up (dmesg).
> 
> If that would the case then what could the advantages in 
> having -be=eth:eth0,eth:eth1,...etc ?
> As Per My Understanding to the point, If any of Ethernet 
> interface goes down then other will act as backup Ethernet interface.
> please correct me, if i am wrong.
> 
> I have started learning TIPC.
> If you have any experimental commands or Doc, please share.

As Jon Maloy stated in his reply, if you want a node to have redundant
TIPC interfaces to Ethernet they have be on totally distinct Ethernet
segements (or independent LANs, if you prefer). You can picture this as:

              |---<1.1.1>---|
              |             |
              |---<1.1.2>---|
              |             |
              |---<1.1.3>---|
             eth0          eth1
             LAN           LAN

While you might be able to get some redundancy by eliminating the
distinct segments requirement, as in the following case:

              |---<1.1.1>---|
              |             |
              |---<1.1.2>---|
              |             |
              |---<1.1.3>---|
              |             |
              +-------------+ 
                single LAN

you wouldn't be protected in the case that a single defective Ethernet
interface starts babbling away on the LAN and corrupts all traffic being
sent on the LAN. Having the requirement for totally isolated LANs means
that you're protected even in this case.

Regards,
Al