help in BGP routing

[Tareq Emad Al Asfoor]

dear all ...

i have switch L3 cisco SW-C6500 ..... i connect   Router1(R1)  to fasteth1  ...and Router3(R3)  to fasteth2 

the network between fasteth1  and  R1 >>>>>> 10.10.10.0/28

the network between fasteth2  and  R3 >>>>>> 10.20.10.0/28

R1 connect to R2   withe network >>>> 10.10.12.0/28

R3 connect to R4   withe network >>>> 10.20.12.0/28

now kindly can somebody help me to configure BGP routing in this network

regards

[Roman Rodichev]

tariq, I think you'll need to provide more information about your routing requirements before someone could help you configure it. Are R2 and R4 your ISP or another entity? Are R1 and R3 your routers? Is this a lab or a real life scenario? Are you intending to run eBGP between R1 and R2 and between R3 and R4? And then iBGP between R1 and R3?

[Tareq Emad Al Asfoor]

dear ..

R1 and R3 routers ..... this is a lab ... when i can use ebgp and when i can use ibgp ?????

[cadet alain]

when i can use ebgp and when i can use ibgp

eBGP: the 2 BGP peers are in different ASes

iBGP: the 2 BGP peers are in the same AS

Regards.

Alain.

[Reza Sharifi]

Are you trying to configure IBGP or EBGP?

Usually, with IBGP, you use the loopback addresses and with EBGP physical address.

Before you confiure BGP, make sure you have connectivity between r1 and r2 by ping the addresses

then you can use the sample for EBGP

on r1

router bgp 65000
  bgp log-neighbor-changes
  neighbor 10.10.12.1 remote-as 65412

on r2

router bgp 65412
  bgp log-neighbor-changes
  neighbor 10.10.12.2 remote-as 65000

HTH