[c-nsp] Default Route recalculated every 60 seconds.

[Bradley Ordner]

Thanks Gert, I will now ask them to do packet capture on their side and see if they are advertising this default to any other customer every 60 seconds. 

Something else I noticed, we only accept routes less than or equal to /18. I noticed that many updates come in, for different prefixes. I can’t see how the Internet could be that unstable unless there is something wrong with their network. Wonder what is the norm when seeing so many prefixes change. 

Brad




Sent from my iPhone

> On 20 Apr 2020, at 7:55 pm, Gert Doering <gert at greenie.muc.de> wrote:
> 
> Hi,
> 
>> On Mon, Apr 20, 2020 at 09:36:55AM +0000, Bradley Ordner wrote:
>> They have told me they have no other issues with other customers and same config, but this could be a bug between different IOS versions because I am running IOS-XE and they may be running XR as they have a ASR9K.
> 
> Strictly speaking, there is no "issue", except that the counter for
> "how old is the route?" on your side is being reset every minute.
> 
> Packet forwarding works, routing is stable, no CPU churn.
> 
> WRT "bugs between different IOS versions" - please read what I wrote
> before: frequent reannouncements of a single route *can not* be triggered
> by anything on your side.  There is nothing in the BGP protocol which 
> would enable this.  (If it happens for *all* routes, it could be a 
> soft reconfig request going awry, but this not what you see)
> 
> gert
> 
> -- 
> "If was one thing all people took for granted, was conviction that if you 
> feed honest figures into a computer, honest figures come out. Never doubted 
> it myself till I met a computer with a sense of humor."
>                             Robert A. Heinlein, The Moon is a Harsh Mistress
> 
> Gert Doering - Munich, Germany                             gert at greenie.muc.de