Hi,

On Tue, Apr 23, 2019 at 02:48:04PM +0200, Mirjam Kuehne wrote:
> When withdrawing an IP prefix from the Internet, an origin network sends
> BGP withdraw messages, which are expected to propagate to all BGP
> routers that hold an entry for that IP prefix in their routing table.
> Yet network operators occasionally report issues where routers maintain
> routes to IP prefixes withdrawn by their origin network - BGP zombies.

These are "ghosts", not zombies :-)

https://www.sixxs.net/tools/grh/

Gert Doering
        -- NetMaster
-- 
have you enabled IPv6 on something today...?

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