This whole protecting/verifying redundant customer functionality is a
difficult problem.
I have found it difficult to implement mechanisms that detect all possible
faults on the main connection without making things very complicated.
Mostly for remote areas where there is only one local POP that
We need to upgrade some ASR9Ks that have a lot of connected devices with
complex interrelationships and we have to do a lot of work to make sure all
the correct redundancy is in place prior to the upgrade. Since the router
takes so long to reload, I'd like to find a way to essentially simulate the
Copy/paste a bunch of null0 routes?
deny any acls on interfaces?
On Wed, Aug 14, 2013 at 10:54 AM, John Neiberger jneiber...@gmail.comwrote:
We need to upgrade some ASR9Ks that have a lot of connected devices with
complex interrelationships and we have to do a lot of work to make sure all
I have wondered the same thing (on C6K/N7K.)
I have since given up wondering and stick to using ospf max-metric int
range shedload of interfaces shutdown
That atleast works whilst exposing us to the minimum amount of surprise
code features.
Given enough time, I'm sure SDN/OpenFluff will solve
null0 doesn't cause the NHRP to trigger IMHO this will be a disaster .
shut / no shut is the easiest but it doesn't simulate the whole part. real
test comes when the modules crash when reloading specially after couple of
years... :)
what if we copy a empty config ??? and rollback the config ?
This raises a good point.
Is the goal to simulate a black-hole that could be seen with an incorrect
adjacency, where control plane is healthy but data plane is broken, or is
the goal to simulate taking this device offline?
Do we care about carrier on the interfaces?
On Wed, Aug 14, 2013 at
In my case, the best result would be to simulate taking the entire device
offline, but I don't know if that's possible to reverse quickly. Taking the
interfaces down would be great. Really, the simplest thing to do is just
spend a minute to create a SMOP that shuts down the interfaces and be done
