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 ? i didn't test this anyway .
On Wed, Aug 14, 2013 at 10:13 PM, Pete Lumbis <alum...@gmail.com> wrote: > 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.com > >wrote: > > > 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 > > loss of forwarding for a minute or so to verify that our redundancy > > preparations were thorough, but I need to be able to back out of it > > quickly. I thought about shutting down the linecards but that's still a > > fairly long restart. I'm hoping to find some method much faster than > that. > > > > The simplest and most straightforward way is to shut down all the > > interfaces manually and then rollback if necessary. We can take it out of > > routing by setting the overload bit in ISIS, but that still leaves > routing > > and forwarding in place for locally connected interfaces, which is what > we > > want to stop. We were tossing around some ideas and wondered, probably > just > > academically, if there were a way to completely stop forwarding > > temporarily. > > > > Is there a way to disable forwarding through an ASR9K that is easily and > > quickly reversible? We'll probably do the interface shutdown method since > > it's so simple, but now I'm curious what other options might be > available. > > _______________________________________________ > > cisco-nsp mailing list cisco-nsp@puck.nether.net > > https://puck.nether.net/mailman/listinfo/cisco-nsp > > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > > _______________________________________________ > cisco-nsp mailing list cisco-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/