[alcatel-nsp] Advertising prefixes to BGP peer.

Bryan deadheadblues at gmail.com
Mon Dec 13 15:53:00 EST 2010


I dont think this is possible, Cisco has a way of "injecting" more
specifics, but I dont think ALU does...or at least havent come across
it.

On Mon, Dec 13, 2010 at 1:33 PM, Phil Bedard <philxor at gmail.com> wrote:
> You would need to get the customer to advertise them as /24s or if the
> customer is okay with it you could create /24 null routes and advertise
> those, but the as-path would originate with your ASN and not the
> customers...
>
> Phil
>
> On 12/13/10 2:46 PM, "Tan Shao Yi" <tansy at tansy.org> wrote:
>
>>Hi,
>>
>>I wanted to add that I am actually receiving those prefixes as larger
>>/23s from a customer, but I am trying to advertise them as specific
>>/24s in a bid to shift incoming traffic through different BGP
>>neighbours.
>>
>>Regards.
>>
>>On Tue, Dec 14, 2010 at 3:43 AM, Tan Shao Yi <tansy at tansy.org> wrote:
>>> Hi Thedin, James,
>>>
>>> Thanks. Would these show up in "show router bgp neighbour X
>>> advertising-protocol"?
>>>
>>> The policy statement is specified in the "export" section of the bgp
>>> group config. I added a couple of /24s exacts to MY-SPECIFIC-PREFIXES,
>>> however, they never seem to show up in "advertising-protocol".
>>>
>>> Adding "protocol bgp" didn't seem to make a difference.
>>>
>>> Am I doing something wrong?
>>>
>>> Regards.
>>>
>>> On Tue, Dec 14, 2010 at 3:24 AM, James Jones <james at freedomnet.co.nz>
>>>wrote:
>>>> Yea I would try that.
>>>>
>>>> On 13/12/10 2:20 PM, Thedin Guruge wrote:
>>>>
>>>> Hi,
>>>> yeah i don't see why not,
>>>> you could also try
>>>>                entry 80
>>>>                    from
>>>>                        protocol bgp
>>>>                        prefix-list "MY-SPECIFIC-PREFIXES"
>>>>                    exit
>>>>                    action accept
>>>>                    exit
>>>>                exit
>>>> Thanks
>>>> Thedin
>>>>
>>>> On Tue, Dec 14, 2010 at 8:10 AM, Tan Shao Yi <tansy at tansy.org> wrote:
>>>>>
>>>>> Hi,
>>>>>
>>>>> I have been trying to advertise specific prefixes to another BGP but
>>>>> to no success.
>>>>>
>>>>> Would an entry like the following in the policy work?
>>>>>
>>>>>                entry 80
>>>>>                    from
>>>>>                        prefix-list "MY-SPECIFIC-PREFIXES"
>>>>>                    exit
>>>>>                    action accept
>>>>>                    exit
>>>>>                exit
>>>>>
>>>>>
>>>>> Thanks in advance.
>>>>>
>>>>> Regards.
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>>>>
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