If you have just one BGP edge router, u don't need to use iBGP. But if you have many ISP, with many edge routers. iBGP is very useful to pass BGP attributes from one edge to another and so making global decisions for exiting the AS based on BGP attributes (for example, using local-pref propagated by iBGP to prefer an exit path to your AS). Depending on your network design, this kind of architecture can result in routing loops (in some cases) if all routers are not BGP routers. => please read the article :"BGP and HSRP [7:49807]" for some example of use of iBGP in customer network.
Hope it helps. -- Stephane LITKOWSKI Student in a French computer science school EPITA Telecom & Network specialization (Paris, FRANCE) CCNA + CCNP EMail : [EMAIL PROTECTED] ""hinwoto"" a icrit dans le message de news: [EMAIL PROTECTED] > Hello guys, > > I'm a newbie in BGP, please forgive me for asking begineer question of IBGP > I can see IBGP usage for transit AS in ISP network which is for updating the > AS path when BGP routes are redistribute into IGP or it's configure no > synchronization with IGP. > > However, it makes me confuse about IBGP usage in enterprise company network, > since > - enterprise company won't want to be transit AS and will just received > packets for its AS as well as received default route from ISP > - moreover, the external AS update will not be advertised by the edge BGP > router into other routers within the same AS if synchronizatioin with IGP > is enabled. > > Can anyone please show me the light of this issue, IBGP usage for company > network ? > > Thanks and best regards > Hinwoto Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=49894&t=49736 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
