Abhay D.S., et al,
Their are multiple issues that need to be addressed
before you can even attempt to sucessfully perform
a cascade restart:
1) NSF is a patented process that is specific to
one well-known company.
2) Their is no GUARANTEE that any Restart will
be sucessful, that the LSDB will be stable and/or
that helper(s) exist.
3) It would be my initial expectation that
resumption of recieving "aliveness" from a
restarting router COULD be a passive method.
Mitchell Erblich
-----------------
"Abhay D.S" wrote:
>
> hi all,
>
> Suppose I am providing real-time transactions over IP in a
> non NSR environment(I dont invest much on getting a backup RP i.e).
>
> But I have NSF, owing to the ease of which OSPF can be used, I
> use OSPF to manage connections to WAN.
>
> And I have bought new I/0 modules which require a restart for
> all my routers for proper installation.
>
> Luckily, I have inservice upgrade on the boxes.
>
> Assuming that I am a new operator without any certifications under
> my belt, I dont have a beautiful NMS with colored buttons.
>
> But I must implement the new I/O cards and its features without disturbing
> the users who are using the network for routing transactions such as data
> backup over network or voice forwarding and other distributed applications
> running over TCP/IP using my network.
>
> I want to graceful restart all my routers one by one, called as cascaded
> re-starts, how can I make sure the transition is done seamlessly.
>
> I want the "this thing" to be automatic, since each router is graceful
> restarted
> and then then the next one is re-started and then the next one,
> automatically.
>
> I can write a script to do that, but I am not sure the forwarding will be
> safe,
> because it is difficult to control the network transient conditions.
>
> Any mechanism available ?.
>
> Thanks and Regards,
> Abhay
>
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