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

[<nar...@wi...>]

>I think Surya's response explains the situation pretty well. Let us know
>if you have further questions.

Yes. Surya comments were clear to my questions.
I will look more deep in to tipc and come back.
thanks.

Best regards
Naresh Kamboju

>Regards,
>Al

>> -----Original Message-----
>> From: Suryanarayana Garlapati [mailto:SGa...@go...]
>> Sent: Thursday, August 26, 2010 2:38 AM
>> To: nar...@wi...; Stephens, Allan
>> Cc: jon...@er...; tip...@li...
>> Subject: RE: [tipc-discussion] Request: Unable to config
>> second node onsamemachine
>>
>> Hi Naresh,
>> For the scenario 3:
>> > scenario 3: two Ethernet interfaces eth0, eth1
>> >
>> > Machine-1                                   Machine-2
>> > |------------- |                             |---------------|
>> > |  <1.1.1>  |                             |<1.1.2>     |
>> > |     eth0     |       ???                 | eth0          |
>> > |     eth1     |       ???                 | eth1          |
>> > ---------------                               ----------------
>>
>> TIPC expects that there is connectivity between eth0-eth0 and
>> eth1-eth1 and there is no intermixing among them(means
>> totally distinct Ethernet segements (or independent LANs, if
>> you prefer)).
>> See the diagram below
>>
>>  Machine-1                                   Machine-2
>>  |------------- |                             |---------------|
>>  |  <1.1.1>  |                          |<1.1.2>     |
>>  |     eth0     | <-------------------> | eth0          |
>>  |     eth1     | <-------------------> | eth1          |
>>  ---------------                               ----------------
>>
>> Say connectivity between eth0-eth0 is broken, then TIPC
>> messaging will be done on the eth1-eth1 link. TIPC
>> automatically does the link changeover, when it detects the
>> failure on one link.
>>
>> Regards
>> Surya
>>
>>
>> > -----Original Message-----
>> > From: nar...@wi... [mailto:nar...@wi...]
>> > Sent: Thursday, August 26, 2010 11:54 AM
>> > To: all...@wi...
>> > Cc: jon...@er...; Suryanarayana Garlapati; tipc-
>> > dis...@li...
>> > Subject: RE: [tipc-discussion] Request: Unable to config
>> second node
>> > onsame machine
>> >
>> >
>> > Allan wrote:
>> > >
>> > >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.
>> >
>> > valuable information. thanks.
>> > let me give a picture of the same:
>> >
>> > scenario 1: single Ethernet interface from eth0
>> >
>> >   Machine-1                                  Machine-2
>> > |------------- |                             |---------------|
>> > |  <1.1.1>  |                              |<1.1.2>     |
>> > |     eth0     |<-------------------->| eth0          |
>> > ---------------                               ----------------
>> > Connection established between (<1.1.1>eth0; <1.1.2>eth0)
>> working fine
>> >
>> > scenario 2: single Ethernet interface from eth1
>> >
>> > Machine-1                                   Machine-2
>> > |------------- |                             |---------------|
>> > |  <1.1.1>  |                              |<1.1.2>     |
>> > |     eth1     |<-------------------->| eth1          |
>> > ---------------                               ----------------
>> > Connection established between (<1.1.1>eth1; <1.1.2>eth1)
>> working fine
>> >
>> > scenario 3: two Ethernet interfaces eth0, eth1
>> >
>> > Machine-1                                   Machine-2
>> > |------------- |                             |---------------|
>> > |  <1.1.1>  |                             |<1.1.2>     |
>> > |     eth0     |       ???                 | eth0          |
>> > |     eth1     |       ???                 | eth1          |
>> > ---------------                               ----------------
>> >
>> > In Scenario 3, what are the probabilities for effective ways of
>> > communicating  Machines by TIPC.
>> >
>> > May i know the backup plan for the connection, i mean if connection
>> > lost from one Ethernet interface what could be the ways to re-
>> > establishing connection curious about the Link Changeover mechanism.
>> >
>> > Best regards
>> > Naresh Kamboju
>> >
> > >Regards,
> > >Al