Brainstorming acceptance issues - WAN impediment

Hugo Slabbert hugo at
Tue Feb 7 19:09:41 UTC 2017

On Tue 2017-Feb-07 16:56:55 +0100, Antonio Ojea Garcia <aojea at> wrote:

>2017-02-06 20:10 GMT+01:00 Kasper Adel <karim.adel at>:
>> Hi,
>> I am in the process of testing an 'automation/sdn' kind of controller, it
>> will be managing configuration on our routers and also deploying some VNFs
>> too.
>> Before accepting it, i'd like to perform some testing, to make sure of the
>> behavior if there are network issues between the controller and the devices
>> (routers or servers), during creation of services.
>> From the top of my head, I can think of the basic tests like introducing
>> jitter and delay but i would appreciate more ideas or even test cases that
>> i can re-use.
>> Thanks
>For sure you need to check failover scenarios, reboot the controller or
>isolate it during some time.

- Traffic getting blackholed in one direction or the other (e.g. not 
   something obvious like links down or ICMP unreachables)

- "fun" things like MTU issues resulting in some traffic getting through 
   but not all

- Are there redundant controllers?  Can they get split-brained?

Hugo Slabbert       | email, xmpp/jabber: hugo at
pgp key: B178313E   | also on Signal
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