Ethernet Switches & Routers

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Established Member
Posts: 1
Registered: ‎07-19-2012

Aggregated and additionaly more specific routes advertisment in bgp

Hello,

 

currently we're using 2 MLXe-16 routers as upstream routers for some more specific routers and i'm trying to advertise our aggregates and additionally our sub aggregates to our upstream providers, but i collapse with the configuration at the moment.

 

 

For for exampe, we have the following aggregate. This aggregate we want to advertise with some specific parameters, eg with as path prepending.  

10.10.0.0/16 

 

What we try to achieve is, to advertise 10.10.0.0/16 and additionally  10.10.0.0/24,10.10.1.0/24, 10.10.10.2.0/24 and so on. 

 

What we tried is to configure the big aggregate as "aggregate-address". But unfortunately it is not working as exspected.

 

For example:

 

router bgp
 aggregate-address 10.10.0.0/16 advertise-map ADVERT-MORE
 aggregate-address 10.10.0.0/16 attribute-map 3PREPEND
 
route-map ADVERT-MORE permit 5
match ip prefix-list ADVERT-MORE

 
ip prefix-list ADVERT-MORE permit 10.10.0.0/24
ip prefix-list ADVERT-MORE permit 10.10.1.0/24
ip prefix-list ADVERT-MORE permit 10.10.2.0/24
 
route-map 3PREPEND permit 10
set as-path 1337 1337 1337
 

 

 

Maybe some one have a hint how to solve our problem?

 

Thank you and best Regards

Alex

Contributor
Posts: 28
Registered: ‎07-25-2013

Re: Aggregated and additionaly more specific routes advertisment in bgp

make sure your upstream is also accepting the /24. best to have them configured it as 10.10.0.0/16 le 24

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