Re: look for BGP routes containing local AS#

won't see it at all if you are peering with a Juniper unless it is specifically configured to send these looped routes with advertise-peer-as, or change the AS number with as-override. On Wed, Jan 28, 2015 at 05:32:34PM +0800, Song Li wrote: Hi Joel, It is right that the BGP route containing

Re: look for BGP routes containing local AS#

the command on your Juniper and find such routes, could you please provider them for us? Thanks! Regards! Song 在 2015/1/28 16:23, joel jaeggli 写道: On 1/27/15 5:45 AM, Song Li wrote: Hi everyone, Recently I studied the BGP AS path looping problem, and found that in most cases, the received BGP

Re: look for BGP routes containing local AS#

not Juniper. Thanks! Regards! Song 在 2015/1/28 16:23, joel jaeggli 写道: On 1/27/15 5:45 AM, Song Li wrote: Hi everyone, Recently I studied the BGP AS path looping problem, and found that in most cases, the received BGP routes containing local AS# are suspicious. However, we checked our BGP routing

look for BGP routes containing local AS#

not found such routes in Adj-RIB-In. We believe that the received BGP routes containing local AS# are related to BGP security problem. Hence, we want to look for some real cases in the wild. Could anybody give us some examples of such routes? Thanks! Best Regards! -- Song Li Room 4-204, FIT

Re: command that can display routes containing AS loops

, Song Li refresh.ls...@gmail.com wrote: Hi everyone, I am curious about the AS loops in the AS-path. I think there should be a very, very few received BGP routes that contain the local AS#. But because such routes will be dropped and not installed in Loc-RIB, I want to know if there is a command

command that can display routes containing AS loops

containing AS loops (in cisco or juniper router). Does anybody know? Thanks! Best! -- Song Li Room 4-204, FIT Building, Network Security, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China Tel:( +86) 010-62446440 E-mail: refresh.ls...@gmail.com

Re: something strange about bgp community

pop the announcement originated from which is rather useful. other's like the one above do tell you something about the policy of somebody on the internet. you can also tell who strips communities... On 1/7/15 5:35 AM, Song Li wrote: Hi everyone, Today when I check one route in Routeviews I find

something strange about bgp community

in the community of this route? Thanks! -- Song Li Room 4-204, FIT Building, Network Security, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China Tel:( +86) 010-62446440 E-mail: refresh.ls...@gmail.com

Is there list of IXPs (containing the information of the AS# of the IXP)

/index.html but they do not contain the AS# of the IXP. Can anybody help me? Thanks! Best! -- Song Li Room 4-204, FIT Building, Network Security, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China Tel:( +86) 010-62446440 E-mail: refresh.ls...@gmail.com

Re: Is there list of IXPs (containing the information of the AS# of the IXP)

they should not appear in the AS-Path, hence i want to filter out them. Best! -- Song Li Room 4-204, FIT Building, Network Security, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China Tel:( +86) 010-62446440 E-mail: refresh.ls...@gmail.com

question about bgp incremental updates

Hi everyone, I have a question about bgp updates: BGP uses an incremental update strategy to conserve bandwidth and processing power. That is, after initial exchange of complete routing information, a pair of BGP routers exchanges only the changes to that information. ( from RFC4274)

question about bogon prefix

is: If I am ISP, can I announce the same bogon prefix(172.116.0.0/24) with AS7018 announced? Will this result in prefix hijacking? Thanks! -- Song Li Room 4-204, FIT Building, Network Security, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China Tel:( +86) 010

Re: bgp convergence problem

will remain 16.1/16(5). I simulated this case in GNS3, and only got the first kind of result, i don't know why? Song 于 2014/5/6 18:13, ISP Services 写道: Hi Song Li, As far as I know there are 2 mechanisms that should prevent this situation you describe from happening: - Not advertising

bgp convergence problem

it will select 16.1/16(2 4 5). in this case, AS1 and AS3 select each other as the best route to AS5, i wonder which route will be the final best route after bgp convergence in AS1 and AS3. Thanks! -- Song Li Room 4-204, FIT Building, Network Security, Department of Electronic Engineering

Re: question about AS relationship

Thanks. I'm doing some research on route leaks, you are a great help to me. Sky li On Friday, February 21, 2014 08:57:07 AM Song Li wrote: the AS relationship between AS1 and AS2/3 is peer, and AS1 cannot announce routes from AS3 to provider1 by rule. Or even Peer-AS2's routes to Peer-AS3

question about AS relationship

Hi everyone, I have one simple question: as for AS relationship, should customer tell its provider the AS# of its own customers, or the provider have the right to require its customers to do that? Thanks! -- Sky Li

Re: question about AS relationship

Thanks. In order to prevent route leaking, this imformation should be provided to providers. but another question, should the AS relationships between customer and its other neighbors (downstrem/peer/another provider) be private? -- Sky Li On Thursday, February 20, 2014 08:09:35 PM

Re: question about AS relationship

+--+ +-+ | provider1| |provider2| +--+ +-+ ^ ^ | | | | ++ ++---+++--+ |peer