[c-nsp] BGP blackhole community config

[Satish Patel]

I have tried that too and got this error.

R1(config-router)#neighbor xx.xx.xx.xx route-map RTBH out
% "RTBH" used as BGP outbound route-map, tag match not supported
% not supported match will behave as route-map with no match
R1(config-router)#

On Mon, Jun 20, 2016 at 11:21 AM, Tim Densmore
<tdensmore at tarpit.cybermesa.com> wrote:
> You may want to use the "neighbor xxx.xxx.xxx.xxx route-map [route map
> name] out" option rather than redistributing the route map.
>
>
> On 6/19/2016 8:07 PM, Satish Patel wrote:
>> I have added "ip bgp-community new-format" in global config, but i
>> don't have following command in my ASR1006 router
>>
>> neighbor xx.xx.xx.xx remote-as 200 send-community
>>
>> so i have added
>>
>> neighbor xx.xx.xx.xx send-community
>>
>>
>> Still not working :(  do i need to add 192.0.2.1 IP in my route map ?
>>
>> On Sun, Jun 19, 2016 at 9:06 PM, Rich Davies <rich.davies at gmail.com> wrote:
>>> config term
>>> !
>>> ip bgp-community new-format
>>> !
>>> router bgp 100
>>>  neighbor xx.xx.xx.xx remote-as 200 send-community
>>> !
>>> end
>>>
>>>
>>> Try that and clear your BGP session.   Based on fact you have no "network"
>>> statements to announce directly in BGP you are instead redistributing static
>>> routes into BGP to be announced.   I believe you need to add the "ip
>>> bgp-community new-format" to your global configuration and in addition tell
>>> your neighbor statement to "send-community".
>>>
>>> BGP community is an optional transitive attribute its only sent to external
>>> ASN if you tell it to.
>>>
>>>
>>> More on communities indicating they are (optional) transitive attributes:
>>> http://www.cisco.com/c/en/us/about/press/internet-protocol-journal/back-issues/table-contents-24/bgp-communities.html
>>>
>>> On Sun, Jun 19, 2016 at 7:37 PM, Satish Patel <satish.txt at gmail.com> wrote:
>>>> We have setup new BGP configuration with ISP and ISP has been told
>>>> send community "64682:0" for blackholing. I am new in BGP.
>>>>
>>>> I was reading BGP community format is ASN:NN but my ISP ASN number
>>>> isn't 64682 so i am assuming they gave me example (64682:0)
>>>>
>>>> This is what i configure in my router.
>>>>
>>>> router bgp 100
>>>>  bgp log-neighbor-changes
>>>>  redistribute static route-map RTBH
>>>>  neighbor xx.xx.xx.xx remote-as 200
>>>>
>>>>
>>>> route-map RTBH permit 10
>>>>  match tag 666
>>>>  set community <ISP_ASN>:666
>>>>
>>>> route-map RTBH permit 20
>>>>
>>>>
>>>> I have send following null route but it didn't work :(
>>>>
>>>> ip route xx.x.x.xx 255.255.255.255 Null0 tag 666
>>>>
>>>>
>>>> what i am doing wrong? how do i use community to send blackhole route?
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>>>
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>