[j-nsp] cogent bgp example?

[Korey Verlsteffen]

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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