[j-nsp] cogent bgp example?

[Frances Albemuth]

 From a theoretical perspective there is nothing inherently unstable
about this configuration from a layer two or layer three standpoint.
I've heard that people have had issues with peculiar emergent
qualities of the implied route reflection and aggregation topology,
however.

 -FC

On Thu, Aug 21, 2008 at 1:17 PM, manolo <mhernand1 at comcast.net> wrote:
> Not the Junos config itself. I was not being specific its not from the user
> hardware sites its an issue on the cogent side. The 2 peer setup has never
> been stable for me with Foundry, Cisco or Juniper. Only when I get them to
> give me a standard single peer setup.
>
>
> Manolo
>
> Korey Verlsteffen wrote:
>>
>> Hi Manolo,
>>
>>    Can you point out the flaws in this comfig for me and make
>> recommendations?  I'm not a junos expert, but I've never had any problems
>> with this config running a few 1Gb/s links at near capacity.  I'm always
>> looking to improve my setup.
>>
>>
>> - Korey
>>  ----- Original Message -----  From: manolo  To: Korey Verlsteffen  Cc:
>> seph ; juniper-nsp at puck.nether.net  Sent: Thursday, August 21, 2008 12:28 PM
>>  Subject: Re: [j-nsp] cogent bgp example?
>>
>>
>>
>>
>>  Be careful with this cogent setup under high load. It tends to break
>>  quite easily. I have a long documented history of having to prove it to
>>  cogent how bad it really is. I am glad to see cogent doesn't learn from
>>  its mistakes.
>>
>>
>>
>>  Manolo
>>
>>  Korey Verlsteffen wrote:
>>  >> Hi, I'm a small site and I'm just getting ready to go live with a
>>  >> cogent connection. But, I'm finding myself a bit confused by their
>>  >> Peer A / Peer B description. I can find some examples of multihop
>>  >> things, but none seem very clear.
>>  >>
>>  >> Can someone send a basic cogent bgp setup?
>>  >>
>>  >> thanks
>>  >> seph
>>  >>      >
>>  >
>>  > Peer A starts the initial connection to Cogent.  Peer B is for
>> advertising the routes.
>>  >
>>  > A.A.A.A = Cogent Peer A IP address
>>  > B.B.B.B = Cogent Peer B IP address
>>  > X.X.X.X = Your interface IP (assigned by Cogent)
>>  >
>>  > protocols {          >     bgp {            >             group
>> Cogent-Peer-A {
>>  >             type external;
>>  >             neighbor A.A.A.A {
>>  >                 import cogent-peer-policy; ### Set this policy to allow
>> all from Cogent Peer A
>>  >                 authentication-key "xxx"; ### Set your bgp password
>> that was assigned to you from Cogent
>>  >                 export my-bgp-network; ### Policy that advertises your
>> routes to Cogent
>>  >                 peer-as 174;
>>  >             }        >         }            >         group
>> Cogent-Peer-B {
>>  >             type external;
>>  >             local-address X.X.X.X;
>>  >             neighbor B.B.B.B {
>>  >                 multihop {
>>  >                     ttl 6;
>>  >                 }    >                 import cogent-policy; ### Policy
>> to allow all routes from Cogent or filter them as needed
>>  >                 authentication-key "xxx"; ### Set your bgp password
>> that was assigned to you from Cogent
>>  >                 peer-as 174;
>>  >             }        >         }    >
>>  > You will need to set your IP assigned by Cogent on the loop back
>> interface      >
>>  >  interfaces {
>>  >         lo0 {
>>  >         description Loopback;
>>  >         unit 0 {
>>  >             family inet {
>>  >                 address 127.0.0.1/32;
>>  >                 address X.X.X.X/32;
>>  >             }
>>  >         }
>>  >     }
>>  >
>>  > Don't forget to setup your policies.
>>  >
>>  >
>>  > Sincerely,
>>  >
>>  > Korey Verlsteffen
>>  > kverlsteffen at securenetsystems.net
>>  > http://www.securenetsystems.net
>>  >
>>  >
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>>  >
>>  >
>>
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