[c-nsp] OSPF routing question

[Gert Doering]

Hi,

On Tue, Jul 17, 2018 at 02:17:25PM -0700, Lee Starnes wrote:
> I have a question about OSPF route redistribution. We have no issues
> redistributing subnets in the network out of our /19 blocks. But we have a
> /22 block that the entire /22 is allocated to a single client. The routes
> redistribute across all the all switches except back to the edge routers
> that announce them via BGP to our upstream carriers. This being because
> there are holdown routes for the BGP on this of the same size IP block. Is
> there a way to allow the /22 block to propagate to the edge routers and
> still maintain the hold down routes we need to announce that /22 via BGP to
> our various upstream carriers?

If we do this, we have holddown routes for the block, and more specifics
pointing towards the customer.  Like, /24 -> null0, and 2x /25 -> customer.

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
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