eBGP basic config

 router bgp 65109
   bgp router-id 33.33.33.33
   network 10.108.1.0 mask 255.255.255.0   
   network 10.108.33.0 mask 255.255.255.0
   neighbor 22.22.22.22 remote-as 65110
   neighbor 22.22.22.22 update-source Loopback0
   neighbor 22.22.22.22 ebgp-multihop 5

• 22.22.22.22: is the loopback0 of the other router.
• 65110: is different from the router's own bgp 65109
• 22.22.22.22: can be up to 5 hops away because of ebgp-multihop 5, [the TTL set to 5]