[c-nsp] Redistributed connected / static prefixes to upstream and set as-path prepend

Florin Florian florin.florian at gmail.com
Wed Nov 1 14:55:03 EDT 2017


Hi,

You have to use the "ip bgp-community new-format" in order to see the
community in the format.

You should try to configure "neighbor x.x.x.x send-community" for the
community to be sent to the peer (upstream provider in this case).

Setting it in the route-map alone will not do it.

Regards

On Wed, Oct 25, 2017 at 1:24 AM, CiscoNSP List <CiscoNSP_list at hotmail.com>
wrote:

> Hi,
>
> We are redistributing our own prefixes via iBGP with redist connected +
> static with route-map :
>
> router bgp AAAA
>  address-family ipv4
>   redistribute connected route-map OUR_RANGES
>   redistribute static route-map OUR_RANGES
>
> route-map OUR_RANGES permit 10
>  match ip address prefix-list PL_OUR_RANGES
>  set community AAAA:1000 AAAA:1301 AAAA:14000
>
>
> ip prefix-list PL_OUR_RANGES seq 5 permit XXX.XXX.XXX.0/20 le 32
>
>
> Which is working fine - but advertisement of the aggregate/supernet to our
> upstreams is not allowing prepending of as? (Have performed clear ip bgp
> nei_ip)
>
>
> Is it because the prefixes are seen as Origin incomplete vs Origin IGP?
>
>
> router bgp AAAA
>  address-family ipv4
>   neighbor UPSTREAM_A_IPTRANSIT route-map UPSTREAM_A_OUT_OUT out
>
>
> route-map UPSTREAM_A_OUT_OUT permit 30
>  match ip address prefix-list PL_OUR_PREFIXES_OUT
>  set as-path prepend AAAA
>
>
> #sh ip bgp neighbors  WWW.WWW.WWW. advertised-routes
>      Network          Next Hop            Metric LocPrf Weight Path
>  *>i XXX.XXX.XXX.0/20  YYY.YYY.YYY.218           0    100      0 ?
>
>
> #sh ip bgp route-map UPSTREAM_A_OUT_OUT
>      Network          Next Hop            Metric LocPrf Weight Path
>  * i XXX.XXX.XXX.0/20  YYY.YYY.YYY.217           0    100      0 ?
>  *bi                  YYY.YYY.YYY.217           0    100      0 ?
>  * i                  YYY.YYY.YYY.218           0    100      0 ?
>  *>i                  YYY.YYY.YYY.218           0    100      0 ?
>
>
> Thanks in advance.
>
>
>
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