204
(R3) #configure
(R3) (Config)#ip routing
3. Enter Interface Config mode for port 0/12. This is the interface that is connected to R3, which is in a
different AS. Assign an IP address to the interface, and enable routing on the interface.
(R3) (Interface 0/12)#interface 0/12
(R3) (Interface 0/12)#ip address 172.19.1.29 255.255.255.252 (R3) (Interface 0/12)#routing
(R3) (Interface 0/12)#exit
4. Enter Interface Config mode for loopback interface 0 and assign an IP address to the interface.
(R3) (Config)#interface loopback 0
(R3) (Interface loopback 0)#ip address 192.168.2.3 255.255.255.255
(R3) (Interface loopback 0)#exit
5. Enable BGP and identify the autonomous system (AS) number of the router.
(R3) (Config-router)#router bgp 65049
6. Configure the BGP router ID.
(R3) (Config-router)#bgp router-id 3.3.3.3
7. Specify the maximum number of next hops BGP may include in an ECMP route derived from paths received
from neighbors outside the local autonomous system.
(R3) (Config-router)#maximum-paths 4
8. Enable the logging of adjacency state changes.
(R3) (Config-router)#bgp log-neighbor-changes
9. Configure BGP to advertise connected routes with a metric value of 100.
(R3) (Config-router)#redistribute connected metric 100
10. Configure the keepalive and hold times that BGP uses for all of its neighbors.
(R3) (Config-router)#timers bgp 4 12
11. Configure the loopback addresses of routers in AS 65049.
(R3) (Config-router)#network 192.168.2.3 mask 255.255.255.255
(R3) (Config-router)#neighbor 172.19.1.30 remote-as 65001
(R3) (Config-router)#neighbor 172.19.1.30 description R9
(R3) (Config-router)#exit
(R3) (Config)#exit
7.6. IPv6 Routing
IPv6 is the next generation of the Internet Protocol. With 128-bit addresses, versus 32-bit addresses for IPv4,
IPv6 solves the address depletion issues seen with IPv4 and removes the requirement for Network Address
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