[c-nsp] blackholling using bgp communites

[Kim Onnel]

law 3ayzeeen ne3melha lelnass beto3na (menanet, wayout)

Raya Configs:
___________

1)Route-map :

route-map from-customers permit 5 
match ip community XXX:12345
set ip next-hop <blackhole ip> << anything unroutable !
set community additive no-export

2) Apply the route-map 

neighbor < customer-ip(menanet) > route-map from-customers in

! and then a prefix-list to allow our customers to send us a /32

neighbor < customer-ip > prefix-list < listnumber > in

! and we must do this, for the next-hop to work and not !readvertise 

neighbor < customer-ip > ebgp multi-hop 2


And on the customer side (menanet for e.g)
____________________________________

1) route-map
route-map blackhole permit 5
match tag 12345
set community additive XXX:12345
redistribute static route-map static-to-bgp

2)redistribute static route-map blackhole

Tamam keda ?


On Mon, 21 Mar 2005 11:19:31 +0200, Rob Polland <rpolland at gmail.com> wrote:
> Hi all,
> I want to implement triggered blackholling using bgp communites ( the
> customer send  to us a route with predefined community and we will
> route or traffic destined to this network to nul from our autonomus
> system)
> 
> can any body have any documents or tell me how to do it.
> 
> best wishes
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