Hi Abhay,
Most of this borders on the implementation of the networking
equipment's in-service upgrade. For now, let's just assume that you
have redundant data place connectivity for the new line cards and
solely need do the graceful restarts as indicated below. Again, this
borders more on implementation. However, now the OSPFv2 MIB as
described in RFC 4750 does support a variable which could be polled
to determine when restart on a given router has completed.
ospfRestartStatus OBJECT-TYPE
SYNTAX INTEGER { notRestarting (1),
plannedRestart (2),
unplannedRestart (3)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Current status of OSPF graceful restart."
::= { ospfGeneralGroup 21 }
Hope this helps,
Acee
On Oct 18, 2007, at 11:56 PM, 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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