CCNP CCIE EBGP configuration

Border Gateway Protocol (BGP) is the protocol underlying the global routing system of the internet. Here’s a detailed breakdown:
Purpose: BGP is designed to exchange routing information between different autonomous systems (AS), which are large networks or groupings of networks under a common administration.

Types:
EBGP (External BGP): Manages the exchange of routing information between autonomous systems.
IBGP (Internal BGP): Manages the exchange of routing information within a single autonomous system

External Border Gateway Protocol (EBGP) is an extension of the Border Gateway Protocol (BGP) used for communication between different autonomous systems (AS). Here are some key points about EBGP:

Interconnectivity: EBGP enables network connections between distinct autonomous systems, such as those of different organizations or Internet Service Providers (ISPs).

Global Internet: It serves as the primary protocol for global Internet connectivity, allowing networks to share routing information and direct traffic efficiently.

Edge Routers: EBGP is implemented at the edge or border routers that provide interconnectivity between two or more autonomous systems.

Collaboration with IBGP: EBGP works in collaboration with Internal Border Gateway Protocol (IBGP) to transfer data between external and internal networks.

BGP features

BGP is an open standard protocol
exterior gateway protocol designed for inter-AS domain routing to scale huge neter-network like the internet
It supports classless, VLSM, CIDR, auto, and manual summary
updates are incremental and trigger BGP to send updates to manually defined neighbors as unicast.
BGP is an application layer protocol that uses TCP for reliability, TCP port 179
Metric is attributes
Administrative distance is 20 for external updates (EBGP) and 200 for internal updates (i BGP)

{ In this blog or lab we are going to configure EBGP. router-1 is in AS 6501 and has 12 EBGP neighbor. we will see how to establish the EBGP neighbor and share the routes}

Topology:-

Goal: establish EBGP neighbors

configure the topology as per the diagram
configure the IP addresses as per the topology
configure EBGP between AS 6501 to rest of the ASs
advertise all the directly connected routes and loopbacks
make sure all the routers have all the routes

R1-AS-6501(config)#interface serial 5/0
R1-AS-6501(config-if)#ip address 12.1.1.1 255.0.0.0
R1-AS-6501(config-if)#no shutdown
R1-AS-6501(config-if)#exit

R1-AS-6501(config)#interface serial 5/1
R1-AS-6501(config-if)#ip address 13.1.1.1 255.0.0.0
R1-AS-6501(config-if)#no shutdown
R1-AS-6501(config-if)#exit

R1-AS-6501(config)#interface serial 5/3
R1-AS-6501(config-if)#ip address 16.1.1.1 255.0.0.0
R1-AS-6501(config-if)#no shutdown
R1-AS-6501(config-if)#exit

R1-AS-6501(config)#interface serial 5/2
R1-AS-6501(config-if)#ip address 14.1.1.1 255.0.0.0
R1-AS-6501(config-if)#no shutdown
R1-AS-6501(config-if)#exit

R1-AS-6501(config)#interface serial 6/5
R1-AS-6501(config-if)#ip address 111.1.1.1 255.0.0.0
R1-AS-6501(config-if)#no shutdown
R1-AS-6501(config-if)#exit

R1-AS-6501(config)#interface serial 6/0
R1-AS-6501(config-if)#ip address 17.1.1.1 255.0.0.0
R1-AS-6501(config-if)#no shutdown
R1-AS-6501(config-if)#exit

R1-AS-6501(config)#interface serial 6/3
R1-AS-6501(config-if)#ip address 19.1.1.1 255.0.0.0
R1-AS-6501(config-if)#no shutdown
R1-AS-6501(config-if)#exit

R1-AS-6501(config)#interface serial 6/1
R1-AS-6501(config-if)#ip address 15.1.1.1 255.0.0.0
R1-AS-6501(config-if)#no shutdown
R1-AS-6501(config-if)#exit

R1-AS-6501(config)#interface serial 6/7
R1-AS-6501(config-if)#ip address 113.1.1.1 255.0.0.0
R1-AS-6501(config-if)#no shutdown
R1-AS-6501(config-if)#exit

R1-AS-6501(config)#interface serial 6/2
R1-AS-6501(config-if)#ip address 18.1.1.1 255.0.0.0
R1-AS-6501(config-if)#no shutdown
R1-AS-6501(config-if)#exit

R1-AS-6501(config)#interface serial 6/4
R1-AS-6501(config-if)#ip address 110.1.1.1 255.0.0.0
R1-AS-6501(config-if)#no shutdown
R1-AS-6501(config-if)#exit

R1-AS-6501(config)#interface serial 6/6
R1-AS-6501(config-if)#ip address 112.1.1.1 255.0.0.0
R1-AS-6501(config-if)#no shutdown
R1-AS-6501(config-if)#exit

R2-AS-6502(config)#interface serial 5/0
R2-AS-6502(config-if)#ip address 12.1.1.2 255.0.0.0
R2-AS-6502(config-if)#no shutdown
R2-AS-6502(config-if)#exit

R2-AS-6502(config)#interface fastethernet 0/0
R2-AS-6502(config-if)#ip address 20.1.1.1 255.0.0.0
R2-AS-6502(config-if)#no keepalive
R2-AS-6502(config-if)#no shutdown
R2-AS-6502(config-if)#exit

R2-AS-6502(config)#interface loopback 1
R2-AS-6502(config-if)#ip address 192.168.20.1 255.255.255.0
R2-AS-6502(config-if)#no shutdown
R2-AS-6502(config-if)#exit

R2-AS-6502(config)#interface loopback 2
R2-AS-6502(config-if)#ip address 192.168.21.1 255.255.255.0
R2-AS-6502(config-if)#no shutdown
R2-AS-6502(config-if)#exit

R2-AS-6502(config)#interface loopback 3
R2-AS-6502(config-if)#ip address 192.168.22.1 255.255.255.0
R2-AS-6502(config-if)#no shutdown
R2-AS-6502(config-if)#exit

R2-AS-6502(config)#interface loopback 4
R2-AS-6502(config-if)#ip address 192.168.23.1 255.255.255.0
R2-AS-6502(config-if)#no shutdown
R2-AS-6502(config-if)#exit

R3-AS-6503(config)#interface serial 5/1
R3-AS-6503(config-if)#ip address 13.1.1.2 255.0.0.0
R3-AS-6503(config-if)#no shutdown
R3-AS-6503(config-if)#exit

R3-AS-6503(config)#interface fastethernet 0/0
R3-AS-6503(config-if)#ip address 30.1.1.1 255.0.0.0
R3-AS-6503(config-if)#no keepalive
R3-AS-6503(config-if)#no shutdown
R3-AS-6503(config-if)#exit

R3-AS-6503(config)#interface loopback 1
R3-AS-6503(config-if)#ip address 192.168.30.1 255.255.255.0
R3-AS-6503(config-if)#no shutdown
R3-AS-6503(config-if)#exit
R3-AS-6503(config)#interface loopback 2
R3-AS-6503(config-if)#ip address 192.168.31.1 255.255.255.0
R3-AS-6503(config-if)#no shutdown
R3-AS-6503(config-if)#exit
R3-AS-6503(config)#interface loopback 3
R3-AS-6503(config-if)#ip address 192.168.32.1 255.255.255.0
R3-AS-6503(config-if)#no shutdown
R3-AS-6503(config-if)#exit
R3-AS-6503(config)#interface loopback 4
R3-AS-6503(config-if)#ip address 192.168.33.1 255.255.255.0
R3-AS-6503(config-if)#no shutdown
R3-AS-6503(config-if)#exit

R4-AS-6504(config)#interface serial 5/2
R4-AS-6504(config-if)#ip address 14.1.1.2 255.0.0.0
R4-AS-6504(config-if)#no shutdown
R4-AS-6504(config-if)#exit

R4-AS-6504(config)#interface fastethernet 0/0
R4-AS-6504(config-if)#ip address 40.1.1.1 255.0.0.0
R4-AS-6504(config-if)#no keepalive
R4-AS-6504(config-if)#no shutdown
R4-AS-6504(config-if)#exit

R4-AS-6504(config)#interface loopback 1
R4-AS-6504(config-if)#ip address 192.168.40.1 255.255.255.0
R4-AS-6504(config-if)#no shutdown
R4-AS-6504(config-if)#exit
R4-AS-6504(config)#interface loopback 2
R4-AS-6504(config-if)#ip address 192.168.41.1 255.255.255.0
R4-AS-6504(config-if)#no shutdown
R4-AS-6504(config-if)#exit
R4-AS-6504(config)#interface loopback 3
R4-AS-6504(config-if)#ip address 192.168.42.1 255.255.255.0
R4-AS-6504(config-if)#no shutdown
R4-AS-6504(config-if)#exit
R4-AS-6504(config)#interface loopback 4
R4-AS-6504(config-if)#ip address 192.168.43.1 255.255.255.0
R4-AS-6504(config-if)#no shutdown
R4-AS-6504(config-if)#exit

R5-AS-6505(config)#interface serial 6/1
R5-AS-6505(config-if)#ip address 15.1.1.2 255.0.0.0
R5-AS-6505(config-if)#no shutdown
R5-AS-6505(config-if)#exit

R5-AS-6505(config)#interface fastethernet 0/0
R5-AS-6505(config-if)#ip address 50.1.1.1 255.0.0.0
R5-AS-6505(config-if)#no keepalive
R5-AS-6505(config-if)#no shutdown
R5-AS-6505(config-if)#exit

R5-AS-6505(config)#interface loopback 1
R5-AS-6505(config-if)#ip address 192.168.50.1 255.255.255.0
R5-AS-6505(config-if)#no shutdown
R5-AS-6505(config-if)#exit

R5-AS-6505(config)#interface loopback 2
R5-AS-6505(config-if)#ip address 192.168.51.1 255.255.255.0
R5-AS-6505(config-if)#no shutdown
R5-AS-6505(config-if)#exit
R5-AS-6505(config)#interface loopback 3
R5-AS-6505(config-if)#ip address 192.168.52.1 255.255.255.0
R5-AS-6505(config-if)#no shutdown
R5-AS-6505(config-if)#exit
R5-AS-6505(config)#interface loopback 4
R5-AS-6505(config-if)#ip address 192.168.53.1 255.255.255.0
R5-AS-6505(config-if)#no shutdown
R5-AS-6505(config-if)#exit

R6-AS-6506(config)#interface serial 5/3
R6-AS-6506(config-if)#ip address 16.1.1.2 255.0.0.0
R6-AS-6506(config-if)#no shutdown
R6-AS-6506(config-if)#exit

R6-AS-6506(config)#interface fastethernet 0/0
R6-AS-6506(config-if)#ip address 60.1.1.1 255.0.0.0
R6-AS-6506(config-if)#no keepalive
R6-AS-6506(config-if)#no shutdown
R6-AS-6506(config-if)#exit

R6-AS-6506(config)#interface loopback 1
R6-AS-6506(config-if)#ip address 192.168.60.1 255.255.255.0
R6-AS-6506(config-if)#no shutdown
R6-AS-6506(config-if)#exit
R6-AS-6506(config)#interface loopback 2
R6-AS-6506(config-if)#ip address 192.168.61.1 255.255.255.0
R6-AS-6506(config-if)#no shutdown
R6-AS-6506(config-if)#exit
R6-AS-6506(config)#interface loopback 3
R6-AS-6506(config-if)#ip address 192.168.62.1 255.255.255.0
R6-AS-6506(config-if)#no shutdown
R6-AS-6506(config-if)#exit
R6-AS-6506(config)#interface loopback 4
R6-AS-6506(config-if)#ip address 192.168.33.1 255.255.255.0
R6-AS-6506(config-if)#no shutdown
R6-AS-6506(config-if)#exit

R7-AS-6507(config)#interface serial 6/0
R7-AS-6507(config-if)#ip address 17.1.1.2 255.0.0.0
R7-AS-6507(config-if)#no shutdown
R7-AS-6507(config-if)#exit

R7-AS-6507(config)#interface fastethernet 0/0
R7-AS-6507(config-if)#ip address 70.1.1.1 255.0.0.0
R7-AS-6507(config-if)#no keepalive
R7-AS-6507(config-if)#no shutdown
R7-AS-6507(config-if)#exit

R7-AS-6507(config)#interface loopback 1
R7-AS-6507(config-if)#ip address 192.168.70.1 255.255.255.0
R7-AS-6507(config-if)#no shutdown
R7-AS-6507(config-if)#exit

R7-AS-6507(config)#interface loopback 2
R7-AS-6507(config-if)#ip address 192.168.71.1 255.255.255.0
R7-AS-6507(config-if)#no shutdown
R7-AS-6507(config-if)#exit
R7-AS-6507(config)#interface loopback 3
R7-AS-6507(config-if)#ip address 192.168.72.1 255.255.255.0
R7-AS-6507(config-if)#no shutdown
R7-AS-6507(config-if)#exit
R7-AS-6507(config)#interface loopback 4
R7-AS-6507(config-if)#ip address 192.168.73.1 255.255.255.0
R7-AS-6507(config-if)#no shutdown
R7-AS-6507(config-if)#exit

R8-AS-6508(config)#interface serial 6/2
R8-AS-6508(config-if)#ip address 18.1.1.2 255.0.0.0
R8-AS-6508(config-if)#no shutdown
R8-AS-6508(config-if)#exit

R8-AS-6508(config)#interface fastethernet 0/0
R8-AS-6508(config-if)#ip address 80.1.1.1 255.0.0.0
R8-AS-6508(config-if)#no keepalive
R8-AS-6508(config-if)#no shutdown
R8-AS-6508(config-if)#exit

R8-AS-6508(config)#interface loopback 1
R8-AS-6508(config-if)#ip address 192.168.80.1 255.255.255.0
R8-AS-6508(config-if)#no shutdown
R8-AS-6508(config-if)#exit
R8-AS-6508(config)#interface loopback 2
R8-AS-6508(config-if)#ip address 192.168.81.1 255.255.255.0
R8-AS-6508(config-if)#no shutdown
R8-AS-6508(config-if)#exit
R8-AS-6508(config)#interface loopback 3
R8-AS-6508(config-if)#ip address 192.168.82.1 255.255.255.0
R8-AS-6508(config-if)#no shutdown
R8-AS-6508(config-if)#exit
R8-AS-6508(config)#interface loopback 4
R8-AS-6508(config-if)#ip address 192.168.83.1 255.255.255.0
R8-AS-6508(config-if)#no shutdown
R8-AS-6508(config-if)#exit

R9-AS-6509(config)#interface serial 6/3
R9-AS-6509(config-if)#ip address 19.1.1.2 255.0.0.0
R9-AS-6509(config-if)#no shutdown
R9-AS-6509(config-if)#exit

R9-AS-6509(config)#interface fastethernet 0/0
R9-AS-6509(config-if)#ip address 90.1.1.1 255.0.0.0
R9-AS-6509(config-if)#no keepalive
R9-AS-6509(config-if)#no shutdown
R9-AS-6509(config-if)#exit

R9-AS-6509(config)#interface loopback 1
R9-AS-6509(config-if)#ip address 192.168.90.1 255.255.255.0
R9-AS-6509(config-if)#no shutdown
R9-AS-6509(config-if)#exit
R9-AS-6509(config)#interface loopback 2
R9-AS-6509(config-if)#ip address 192.168.91.1 255.255.255.0
R9-AS-6509(config-if)#no shutdown
R9-AS-6509(config-if)#exit
R9-AS-6509(config)#interface loopback 3
R9-AS-6509(config-if)#ip address 192.168.92.1 255.255.255.0
R9-AS-6509(config-if)#no shutdown
R9-AS-6509(config-if)#exit

R10-AS-6510(config)#interface serial 6/4
R10-AS-6510(config-if)#ip address 110.1.1.2 255.0.0.0
R10-AS-6510(config-if)#no shutdown
R10-AS-6510(config-if)#exit

R10-AS-6510(config)#interface fastethernet 0/0
R10-AS-6510(config-if)#ip address 100.1.1.1 255.0.0.0
R10-AS-6510(config-if)#no keepalive
R10-AS-6510(config-if)#no shutdown
R10-AS-6510(config-if)#exit

R10-AS-6510(config)#interface loopback 1
R10-AS-6510(config-if)#ip address 192.168.100.1 255.255.255.0
R10-AS-6510(config-if)#no shutdown
R10-AS-6510(config-if)#exit
R10-AS-6510(config)#interface loopback 2
R10-AS-6510(config-if)#ip address 192.168.101.1 255.255.255.0
R10-AS-6510(config-if)#no shutdown
R10-AS-6510(config-if)#exit
R10-AS-6510(config)#interface loopback 3
R10-AS-6510(config-if)#ip address 192.168.102.1 255.255.255.0
R10-AS-6510(config-if)#no shutdown
R10-AS-6510(config-if)#exit

R11-AS-6511(config)#interface serial 6/5
R11-AS-6511(config-if)#ip address 111.1.1.2 255.0.0.0
R11-AS-6511(config-if)#no shutdown
R11-AS-6511(config-if)#exit

R11-AS-6511(config)#interface fastethernet 0/0
R11-AS-6511(config-if)#ip address 11.1.1.1 255.0.0.0
R11-AS-6511(config-if)#no keepalive
R11-AS-6511(config-if)#no shutdown
R11-AS-6511(config-if)#exit

R11-AS-6511(config)#interface loopback 1
R11-AS-6511(config-if)#ip address 192.168.11.1 255.255.255.0
R11-AS-6511(config-if)#no shutdown
R11-AS-6511(config-if)#exit
R11-AS-6511(config)#interface loopback 2
R11-AS-6511(config-if)#ip address 192.168.12.1 255.255.255.0
R11-AS-6511(config-if)#no shutdown
R11-AS-6511(config-if)#exit
R11-AS-6511(config)#interface loopback 3
R11-AS-6511(config-if)#ip address 192.168.13.1 255.255.255.0
R11-AS-6511(config-if)#no shutdown
R11-AS-6511(config-if)#exit
R11-AS-6511(config)#interface loopback 4
R11-AS-6511(config-if)#ip address 192.168.14.1 255.255.255.0
R11-AS-6511(config-if)#no shutdown
R11-AS-6511(config-if)#exit

R12-AS-6512(config)#interface serial 6/6
R12-AS-6512(config-if)#ip address 112.1.1.2 255.0.0.0
R12-AS-6512(config-if)#no shutdown
R12-AS-6512(config-if)#exit
R12-AS-6512(config)#
R12-AS-6512(config)#interface fastethernet 0/0
R12-AS-6512(config-if)#ip address 120.1.1.1 255.0.0.0
R12-AS-6512(config-if)#no keepalive
R12-AS-6512(config-if)#no shutdown
R12-AS-6512(config-if)#exit
R12-AS-6512(config)#
R12-AS-6512(config)#interface loopback 1
R12-AS-6512(config-if)#ip address 192.168.120.1 255.255.255.0
R12-AS-6512(config-if)#no shutdown
R12-AS-6512(config-if)#exit
R12-AS-6512(config)#
R12-AS-6512(config)#interface loopback 2
R12-AS-6512(config-if)#ip address 192.168.121.1 255.255.255.0
R12-AS-6512(config-if)#no shutdown
R12-AS-6512(config-if)#exit
R12-AS-6512(config)#
R12-AS-6512(config)#interface loopback 3
R12-AS-6512(config-if)#ip address 192.168.122.1 255.255.255.0
R12-AS-6512(config-if)#no shutdown
R12-AS-6512(config-if)#exit
R12-AS-6512(config)#
R12-AS-6512(config)#interface loopback 4
R12-AS-6512(config-if)#ip address 192.168.123.1 255.255.255.0
R12-AS-6512(config-if)#no shutdown
R12-AS-6512(config-if)#exit

R1-AS-6501(config)#router bgp 6501

R1-AS-6501(config-router)#neighbor 12.1.1.2 remote-as 6502

R1-AS-6501(config-router)#neighbor 13.1.1.2 remote-as 6503

R1-AS-6501(config-router)#neighbor 16.1.1.2 remote-as 6506

R1-AS-6501(config-router)#neighbor 14.1.1.2 remote-as 6504

R1-AS-6501(config-router)#neighbor 111.1.1.2 remote-as 6511

R1-AS-6501(config-router)#neighbor 17.1.1.2 remote-as 6507

R1-AS-6501(config-router)#neighbor 19.1.1.2 remote-as 6509

R1-AS-6501(config-router)#neighbor 15.1.1.2 remote-as 6505

R1-AS-6501(config-router)#neighbor 113.1.1.2 remote-as 6513

R1-AS-6501(config-router)#neighbor 18.1.1.2 remote-as 6508

R1-AS-6501(config-router)#neighbor 110.1.1.2 remote-as 6510

R1-AS-6501(config-router)#neighbor 112.1.1.2 remote-as 6512

R1-AS-6501(config-router)#network 12.0.0.0 mask 255.0.0.0

R1-AS-6501(config-router)#network 13.0.0.0 mask 255.0.0.0

R1-AS-6501(config-router)#network 16.0.0.0 mask 255.0.0.0

R1-AS-6501(config-router)#network 14.0.0.0 mask 255.0.0.0

R1-AS-6501(config-router)#network 111.0.0.0 mask 255.0.0.0

R1-AS-6501(config-router)#network 17.0.0.0 mask 255.0.0.0

R1-AS-6501(config-router)#network 19.0.0.0 mask 255.0.0.0

R1-AS-6501(config-router)#network 15.0.0.0 mask 255.0.0.0

R1-AS-6501(config-router)#network 113.0.0.0 mask 255.0.0.0

R1-AS-6501(config-router)#network 18.0.0.0 mask 255.0.0.0

R1-AS-6501(config-router)#network 110.0.0.0 mask 255.0.0.0

R1-AS-6501(config-router)#network 112.0.0.0 mask 255.0.0.0

R1-AS-6501(config-router)#no auto-summary

R1-AS-6501(config-router)#no syn

R1-AS-6501(config-router)#exit

*Nov 10 14:46:43.303: %BGP-5-ADJCHANGE: neighbor 12.1.1.2 Up

*Nov 10 14:49:35.795: %BGP-5-ADJCHANGE: neighbor 13.1.1.2 Up

*Nov 10 14:50:37.659: %BGP-5-ADJCHANGE: neighbor 16.1.1.2 Up

*Nov 10 14:52:21.619: %BGP-5-ADJCHANGE: neighbor 14.1.1.2 Up

*Nov 10 14:52:54.091: %BGP-5-ADJCHANGE: neighbor 111.1.1.2 Up

*Nov 10 14:54:40.347: %BGP-5-ADJCHANGE: neighbor 17.1.1.2 Up

*Nov 10 14:56:05.539: %BGP-5-ADJCHANGE: neighbor 19.1.1.2 Up

*Nov 10 14:56:46.423: %BGP-5-ADJCHANGE: neighbor 15.1.1.2 Up

*Nov 10 14:58:12.907: %BGP-5-ADJCHANGE: neighbor 113.1.1.2 Up

*Nov 10 14:59:13.455: %BGP-5-ADJCHANGE: neighbor 18.1.1.2 Up

*Nov 10 15:01:00.043: %BGP-5-ADJCHANGE: neighbor 110.1.1.2 Up

*Nov 10 15:02:14.623: %BGP-5-ADJCHANGE: neighbor 112.1.1.2 Up

R1-AS-6501#show ip bgp summary

BGP router identifier 113.1.1.1, local AS number 6501

BGP table version is 65, main routing table version 65

64 network entries using 7488 bytes of memory

75 path entries using 3900 bytes of memory

14/13 BGP path/bestpath attribute entries using 1736 bytes of memory

12 BGP AS-PATH entries using 288 bytes of memory

0 BGP route-map cache entries using 0 bytes of memory

0 BGP filter-list cache entries using 0 bytes of memory

BGP using 13412 total bytes of memory

BGP activity 64/0 prefixes, 75/0 paths, scan interval 60 secs

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd

12.1.1.2 4 6502 59 75 65 0 0 00:54:18 2

13.1.1.2 4 6503 57 72 65 0 0 00:51:26 6

14.1.1.2 4 6504 53 69 65 0 0 00:48:40 6

15.1.1.2 4 6505 49 64 65 0 0 00:44:15 6

16.1.1.2 4 6506 56 71 65 0 0 00:50:24 5

17.1.1.2 4 6507 51 66 65 0 0 00:46:21 6

18.1.1.2 4 6508 49 61 65 0 0 00:41:48 6

19.1.1.2 4 6509 49 64 65 0 0 00:44:56 6

110.1.1.2 4 6510 45 59 65 0 0 00:40:02 6

111.1.1.2 4 6511 53 69 65 0 0 00:48:07 5

112.1.1.2 4 6512 43 57 65 0 0 00:38:47 6

113.1.1.2 4 6513 47 62 65 0 0 00:42:49 3

R1-AS-6501#show ip route bgp

B 192.168.123.0/24 [20/0] via 112.1.1.2, 00:41:46

B 192.168.72.0/24 [20/0] via 17.1.1.2, 00:49:20

B 192.168.12.0/24 [20/0] via 111.1.1.2, 00:50:38

B 192.168.122.0/24 [20/0] via 112.1.1.2, 00:41:46

B 50.0.0.0/8 [20/0] via 15.1.1.2, 00:46:55

B 192.168.73.0/24 [20/0] via 17.1.1.2, 00:49:20

B 192.168.62.0/24 [20/0] via 16.1.1.2, 00:53:23

B 192.168.13.0/24 [20/0] via 111.1.1.2, 00:50:38

B 192.168.91.0/24 [20/0] via 19.1.1.2, 00:47:55

B 192.168.121.0/24 [20/0] via 112.1.1.2, 00:41:46

B 100.0.0.0/8 [20/0] via 110.1.1.2, 00:43:01

B 192.168.14.0/24 [20/0] via 111.1.1.2, 00:50:38

B 192.168.31.0/24 [20/0] via 13.1.1.2, 00:54:25

B 70.0.0.0/8 [20/0] via 17.1.1.2, 00:49:20

B 192.168.61.0/24 [20/0] via 16.1.1.2, 00:53:23

B 192.168.90.0/24 [20/0] via 19.1.1.2, 00:47:55

B 192.168.120.0/24 [20/0] via 112.1.1.2, 00:41:46

B 192.168.30.0/24 [20/0] via 13.1.1.2, 00:54:25

B 192.168.60.0/24 [20/0] via 16.1.1.2, 00:53:23

B 192.168.42.0/24 [20/0] via 14.1.1.2, 00:51:39

B 192.168.93.0/24 [20/0] via 19.1.1.2, 00:47:55

B 80.0.0.0/8 [20/0] via 18.1.1.2, 00:44:47

B 192.168.43.0/24 [20/0] via 14.1.1.2, 00:51:39

B 192.168.92.0/24 [20/0] via 19.1.1.2, 00:47:57

B 192.168.40.0/24 [20/0] via 14.1.1.2, 00:51:41

B 192.168.130.0/24 [20/0] via 113.1.1.2, 00:45:50

B 192.168.11.0/24 [20/0] via 111.1.1.2, 00:50:40

B 192.168.41.0/24 [20/0] via 14.1.1.2, 00:51:42

B 192.168.81.0/24 [20/0] via 18.1.1.2, 00:43:58

B 192.168.80.0/24 [20/0] via 18.1.1.2, 00:44:51

B 192.168.20.0/24 [20/0] via 12.1.1.2, 00:57:21

B 40.0.0.0/8 [20/0] via 14.1.1.2, 00:51:43

B 192.168.83.0/24 [20/0] via 18.1.1.2, 00:44:00

B 192.168.53.0/24 [20/0] via 15.1.1.2, 00:47:00

B 192.168.82.0/24 [20/0] via 18.1.1.2, 00:44:01

B 11.0.0.0/8 [20/0] via 111.1.1.2, 00:50:13

B 192.168.52.0/24 [20/0] via 15.1.1.2, 00:47:01

B 192.168.51.0/24 [20/0] via 15.1.1.2, 00:47:01

B 192.168.102.0/24 [20/0] via 110.1.1.2, 00:43:08

B 192.168.50.0/24 [20/0] via 15.1.1.2, 00:47:02

B 192.168.103.0/24 [20/0] via 110.1.1.2, 00:43:08

B 192.168.32.0/24 [20/0] via 13.1.1.2, 00:54:33

B 192.168.70.0/24 [20/0] via 17.1.1.2, 00:49:29

B 192.168.100.0/24 [20/0] via 110.1.1.2, 00:43:09

B 120.0.0.0/8 [20/0] via 112.1.1.2, 00:41:55

B 90.0.0.0/8 [20/0] via 19.1.1.2, 00:48:05

B 192.168.33.0/24 [20/0] via 13.1.1.2, 00:54:35

B 60.0.0.0/8 [20/0] via 16.1.1.2, 00:40:55

B 192.168.71.0/24 [20/0] via 17.1.1.2, 00:49:31

B 30.0.0.0/8 [20/0] via 13.1.1.2, 00:40:56

B 192.168.101.0/24 [20/0] via 110.1.1.2, 00:43:12

B 130.0.0.0/8 [20/0] via 113.1.1.2, 00:45:59

R2-AS-6502(config)#router bgp 6502

R2-AS-6502(config-router)#neighbor 12.1.1.1 remote-as 6501

R2-AS-6502(config-router)#network 12.0.0.0 mask 255.0.0.0

R2-AS-6502(config-router)#network 192.168.20.0 mask 255.255.255.0

R2-AS-6502(config-router)#no auto-summary

R2-AS-6502(config-router)#no

R2-AS-6502(config-router)#no syn

R2-AS-6502(config-router)#exit

*Nov 10 14:37:33.615: %BGP-5-ADJCHANGE: neighbor 12.1.1.1 Up

R3-AS-6503(config)#router bgp 6503

R3-AS-6503(config-router)#neighbor 13.1.1.1 remote-as 6501

R3-AS-6503(config-router)#network 13.0.0.0 mask 255.0.0.0

R3-AS-6503(config-router)#network 30.0.0.0 mask 255.0.0.0

R3-AS-6503(config-router)#network 192.168.30.0 mask 255.255.255.0

R3-AS-6503(config-router)#network 192.168.31.0 mask 255.255.255.0

R3-AS-6503(config-router)#network 192.168.32.0 mask 255.255.255.0

R3-AS-6503(config-router)#network 192.168.33.0 mask 255.255.255.0

R3-AS-6503(config-router)#no auto-summary

R3-AS-6503(config-router)#no syn

R3-AS-6503(config-router)#exit

*Nov 10 14:37:05.607: %BGP-5-ADJCHANGE: neighbor 13.1.1.1 Up

R4-AS-6504(config)#router bgp 6504

R4-AS-6504(config-router)#neighbor 14.1.1.1 remote-as 6501

R4-AS-6504(config-router)#network 14.0.0.0 mask 255.0.0.0

R4-AS-6504(config-router)#network 40.0.0.0 mask 255.0.0.0

R4-AS-6504(config-router)#network 192.168.40.0 mask 255.255.255.0

R4-AS-6504(config-router)#network 192.168.41.0 mask 255.255.255.0

R4-AS-6504(config-router)#network 192.168.42.0 mask 255.255.255.0

R4-AS-6504(config-router)#network 192.168.43.0 mask 255.255.255.0

R4-AS-6504(config-router)#no auto-summary

R4-AS-6504(config-router)#no syn

R4-AS-6504(config-router)#exit

*Nov 10 14:34:21.303: %BGP-5-ADJCHANGE: neighbor 14.1.1.1 Up

R5-AS-6505(config)#router bgp 6505

R5-AS-6505(config-router)#neighbor 15.1.1.1 remote-as 6501

R5-AS-6505(config-router)#network 15.0.0.0 mask 255.0.0.0

R5-AS-6505(config-router)#network 50.0.0.0 mask 255.0.0.0

R5-AS-6505(config-router)#network 192.168.50.0 mask 255.255.255.0

R5-AS-6505(config-router)#network 192.168.51.0 mask 255.255.255.0

R5-AS-6505(config-router)#network 192.168.52.0 mask 255.255.255.0

R5-AS-6505(config-router)#network 192.168.53.0 mask 255.255.255.0

R5-AS-6505(config-router)#no auto-summary

R5-AS-6505(config-router)#no syn

R5-AS-6505(config-router)#exit

*Nov 10 14:29:16.271: %BGP-5-ADJCHANGE: neighbor 15.1.1.1 Up

R5-AS-6505#show ip bgp

BGP table version is 65, local router ID is 192.168.53.1

Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,

r RIB-failure, S Stale

Origin codes: i - IGP, e - EGP, ? - incomplete

Network Next Hop Metric LocPrf Weight Path

*> 11.0.0.0 15.1.1.1 0 6501 6511 i

*> 12.0.0.0 15.1.1.1 0 0 6501 i

*> 13.0.0.0 15.1.1.1 0 0 6501 i

*> 14.0.0.0 15.1.1.1 0 0 6501 i

* 15.0.0.0 15.1.1.1 0 0 6501 i

*> 0.0.0.0 0 32768 i

*> 16.0.0.0 15.1.1.1 0 0 6501 i

*> 17.0.0.0 15.1.1.1 0 0 6501 i

*> 18.0.0.0 15.1.1.1 0 0 6501 i

*> 19.0.0.0 15.1.1.1 0 0 6501 i

*> 30.0.0.0 15.1.1.1 0 6501 6503 i

*> 40.0.0.0 15.1.1.1 0 6501 6504 i

*> 50.0.0.0 0.0.0.0 0 32768 i

*> 60.0.0.0 15.1.1.1 0 6501 6506 i

*> 70.0.0.0 15.1.1.1 0 6501 6507 i

*> 80.0.0.0 15.1.1.1 0 6501 6508 i

*> 90.0.0.0 15.1.1.1 0 6501 6509 i

*> 100.0.0.0 15.1.1.1 0 6501 6510 i

*> 110.0.0.0 15.1.1.1 0 0 6501 i

*> 111.0.0.0 15.1.1.1 0 0 6501 i

*> 112.0.0.0 15.1.1.1 0 0 6501 i

*> 113.0.0.0 15.1.1.1 0 0 6501 i

*> 120.0.0.0 15.1.1.1 0 6501 6512 i

*> 130.0.0.0/8 15.1.1.1 0 6501 6513 i

*> 192.168.11.0 15.1.1.1 0 6501 6511 i

*> 192.168.12.0 15.1.1.1 0 6501 6511 i

*> 192.168.13.0 15.1.1.1 0 6501 6511 i

*> 192.168.14.0 15.1.1.1 0 6501 6511 i

*> 192.168.20.0 15.1.1.1 0 6501 6502 i

*> 192.168.30.0 15.1.1.1 0 6501 6503 i

*> 192.168.31.0 15.1.1.1 0 6501 6503 i

*> 192.168.32.0 15.1.1.1 0 6501 6503 i

*> 192.168.33.0 15.1.1.1 0 6501 6503 i

*> 192.168.40.0 15.1.1.1 0 6501 6504 i

*> 192.168.41.0 15.1.1.1 0 6501 6504 i

*> 192.168.42.0 15.1.1.1 0 6501 6504 i

*> 192.168.43.0 15.1.1.1 0 6501 6504 i

*> 192.168.50.0 0.0.0.0 0 32768 i

*> 192.168.51.0 0.0.0.0 0 32768 i

*> 192.168.52.0 0.0.0.0 0 32768 i

*> 192.168.53.0 0.0.0.0 0 32768 i

*> 192.168.60.0 15.1.1.1 0 6501 6506 i

*> 192.168.61.0 15.1.1.1 0 6501 6506 i

*> 192.168.62.0 15.1.1.1 0 6501 6506 i

*> 192.168.70.0 15.1.1.1 0 6501 6507 i

*> 192.168.71.0 15.1.1.1 0 6501 6507 i

*> 192.168.72.0 15.1.1.1 0 6501 6507 i

*> 192.168.73.0 15.1.1.1 0 6501 6507 i

*> 192.168.80.0 15.1.1.1 0 6501 6508 i

*> 192.168.81.0 15.1.1.1 0 6501 6508 i

*> 192.168.82.0 15.1.1.1 0 6501 6508 i

*> 192.168.83.0 15.1.1.1 0 6501 6508 i

*> 192.168.90.0 15.1.1.1 0 6501 6509 i

*> 192.168.91.0 15.1.1.1 0 6501 6509 i

*> 192.168.92.0 15.1.1.1 0 6501 6509 i

*> 192.168.93.0 15.1.1.1 0 6501 6509 i

*> 192.168.100.0 15.1.1.1 0 6501 6510 i

*> 192.168.101.0 15.1.1.1 0 6501 6510 i

*> 192.168.102.0 15.1.1.1 0 6501 6510 i

*> 192.168.103.0 15.1.1.1 0 6501 6510 i

*> 192.168.120.0 15.1.1.1 0 6501 6512 i

*> 192.168.121.0 15.1.1.1 0 6501 6512 i

*> 192.168.122.0 15.1.1.1 0 6501 6512 i

*> 192.168.123.0 15.1.1.1 0 6501 6512 i

*> 192.168.130.0 15.1.1.1 0 6501 6513 i

R6-AS-6506(config)#router bgp 6506

R6-AS-6506(config-router)#neighbor 16.1.1.1 remote-as 6501

R6-AS-6506(config-router)#network 16.0.0.0 mask 255.0.0.0

R6-AS-6506(config-router)#network 60.0.0.0 mask 255.0.0.0

R6-AS-6506(config-router)#network 192.168.60.0 mask 255.255.255.0

R6-AS-6506(config-router)#network 192.168.61.0 mask 255.255.255.0

R6-AS-6506(config-router)#network 192.168.62.0 mask 255.255.255.0

R6-AS-6506(config-router)#network 192.168.63.0 mask 255.255.255.0

R6-AS-6506(config-router)#no auto-summary

R6-AS-6506(config-router)#no syn

R6-AS-6506(config-router)#exit

*Nov 10 14:33:57.391: %BGP-5-ADJCHANGE: neighbor 16.1.1.1 Up

R7-AS-6507(config)#router bgp 6507

R7-AS-6507(config-router)#neighbor 17.1.1.1 remote-as 6501

R7-AS-6507(config-router)#network 17.0.0.0 mask 255.0.0.0

R7-AS-6507(config-router)#network 70.0.0.0 mask 255.0.0.0

R7-AS-6507(config-router)#network 192.168.70.0 mask 255.255.255.0

R7-AS-6507(config-router)#network 192.168.71.0 mask 255.255.255.0

R7-AS-6507(config-router)#network 192.168.72.0 mask 255.255.255.0

R7-AS-6507(config-router)#network 192.168.73.0 mask 255.255.255.0

R7-AS-6507(config-router)#no auto-summary

R7-AS-6507(config-router)#no syn

R7-AS-6507(config-router)#exit

*Nov 10 14:29:40.323: %BGP-5-ADJCHANGE: neighbor 17.1.1.1 Up

R8-AS-6508(config)#router bgp 6508

R8-AS-6508(config-router)#neighbor 18.1.1.1 remote-as 6501

R8-AS-6508(config-router)#network 18.0.0.0 mask 255.0.0.0

R8-AS-6508(config-router)#network 80.0.0.0 mask 255.0.0.0

R8-AS-6508(config-router)#network 192.168.80.0 mask 255.255.255.0

R8-AS-6508(config-router)#network 192.168.81.0 mask 255.255.255.0

R8-AS-6508(config-router)#network 192.168.82.0 mask 255.255.255.0

R8-AS-6508(config-router)#network 192.168.83.0 mask 255.255.255.0

R8-AS-6508(config-router)#no auto-summary

R8-AS-6508(config-router)#no syn

R8-AS-6508(config-router)#exit

*Nov 10 14:27:11.055: %BGP-5-ADJCHANGE: neighbor 18.1.1.1 Up

R9-AS-6509(config)#router bgp 6509

R9-AS-6509(config-router)#neighbor 19.1.1.1 remote-as 6501

R9-AS-6509(config-router)#network 19.0.0.0 mask 255.0.0.0

R9-AS-6509(config-router)#network 90.0.0.0 mask 255.0.0.0

R9-AS-6509(config-router)#network 192.168.90.0 mask 255.255.255.0

R9-AS-6509(config-router)#network 192.168.91.0 mask 255.255.255.0

R9-AS-6509(config-router)#network 192.168.92.0 mask 255.255.255.0

R9-AS-6509(config-router)#network 192.168.93.0 mask 255.255.255.0

R9-AS-6509(config-router)#no auto-summary

R9-AS-6509(config-router)#no syn

R9-AS-6509(config-router)#exit

*Nov 10 14:30:14.695: %BGP-5-ADJCHANGE: neighbor 19.1.1.1 Up

R10-AS-6510(config)#router bgp 6510

R10-AS-6510(config-router)#neighbor 110.1.1.1 remote-as 6501

R10-AS-6510(config-router)#network 100.0.0.0 mask 255.0.0.0

R10-AS-6510(config-router)#network 110.0.0.0 mask 255.0.0.0

R10-AS-6510(config-router)#network 192.168.100.0 mask 255.255.255.0

R10-AS-6510(config-router)#network 192.168.101.0 mask 255.255.255.0

R10-AS-6510(config-router)#network 192.168.102.0 mask 255.255.255.0

R10-AS-6510(config-router)#network 192.168.103.0 mask 255.255.255.0

R10-AS-6510(config-router)#no auto-summary

R10-AS-6510(config-router)#no syn

R10-AS-6510(config-router)#exit

*Nov 10 14:27:49.303: %BGP-5-ADJCHANGE: neighbor 110.1.1.1 Up

R11-AS-6511(config)#router bgp 6511

R11-AS-6511(config-router)#neighbor 111.1.1.1 remote-as 6501

R11-AS-6511(config-router)#network 14.0.0.0 mask 255.0.0.0

R11-AS-6511(config-router)#network 11.0.0.0 mask 255.0.0.0

R11-AS-6511(config-router)#network 192.168.11.0 mask 255.255.255.0

R11-AS-6511(config-router)#network 192.168.12.0 mask 255.255.255.0

R11-AS-6511(config-router)#network 192.168.13.0 mask 255.255.255.0

R11-AS-6511(config-router)#network 192.168.14.0 mask 255.255.255.0

R11-AS-6511(config-router)#no auto-summary

R11-AS-6511(config-router)#no syn

R11-AS-6511(config-router)#exit

R11-AS-6511(config)#

*Nov 10 14:31:20.919: %BGP-5-ADJCHANGE: neighbor 111.1.1.1 Up

R12-AS-6512(config)#router bgp 6512

R12-AS-6512(config-router)#neighbor 112.1.1.1 remote-as 6501

R12-AS-6512(config-router)#network 120.0.0.0 mask 255.0.0.0

R12-AS-6512(config-router)#network 112.0.0.0 mask 255.0.0.0

R12-AS-6512(config-router)#network 192.168.120.0 mask 255.255.255.0

R12-AS-6512(config-router)#network 192.168.121.0 mask 255.255.255.0

R12-AS-6512(config-router)#network 192.168.122.0 mask 255.255.255.0

R12-AS-6512(config-router)#network 192.168.123.0 mask 255.255.255.0

R12-AS-6512(config-router)#no auto-summary

R12-AS-6512(config-router)#no syn

R12-AS-6512(config-router)#exit

*Nov 10 14:27:53.851: %BGP-5-ADJCHANGE: neighbor 112.1.1.1 Up

R13-AS-6513(config)#router bgp 6513

R13-AS-6513(config-router)#neighbor 113.1.1.1 remote-as 6501

R13-AS-6513(config-router)#network 113.0.0.0 mask 255.0.0.0

R13-AS-6513(config-router)#network 130.0.0.0 mask 255.0.0.0

R13-AS-6513(config-router)#network 192.168.130.0 mask 255.255.255.0

R13-AS-6513(config-router)#no auto-summary

R13-AS-6513(config-router)#no syn

R13-AS-6513(config-router)#exit

*Nov 10 14:27:02.375: %BGP-5-ADJCHANGE: neighbor 113.1.1.1 Up

R13-AS-6513#show ip bgp

BGP table version is 65, local router ID is 192.168.133.1

Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,

r RIB-failure, S Stale

Origin codes: i - IGP, e - EGP, ? - incomplete

Network Next Hop Metric LocPrf Weight Path

*> 11.0.0.0 113.1.1.1 0 6501 6511 i

*> 12.0.0.0 113.1.1.1 0 0 6501 i

*> 13.0.0.0 113.1.1.1 0 0 6501 i

*> 14.0.0.0 113.1.1.1 0 0 6501 i

*> 15.0.0.0 113.1.1.1 0 0 6501 i

*> 16.0.0.0 113.1.1.1 0 0 6501 i

*> 17.0.0.0 113.1.1.1 0 0 6501 i

*> 18.0.0.0 113.1.1.1 0 0 6501 i

*> 19.0.0.0 113.1.1.1 0 0 6501 i

*> 30.0.0.0 113.1.1.1 0 6501 6503 i

*> 40.0.0.0 113.1.1.1 0 6501 6504 i

*> 50.0.0.0 113.1.1.1 0 6501 6505 i

*> 60.0.0.0 113.1.1.1 0 6501 6506 i

*> 70.0.0.0 113.1.1.1 0 6501 6507 i

*> 80.0.0.0 113.1.1.1 0 6501 6508 i

*> 90.0.0.0 113.1.1.1 0 6501 6509 i

*> 100.0.0.0 113.1.1.1 0 6501 6510 i

*> 110.0.0.0 113.1.1.1 0 0 6501 i

*> 111.0.0.0 113.1.1.1 0 0 6501 i

*> 112.0.0.0 113.1.1.1 0 0 6501 i

* 113.0.0.0 113.1.1.1 0 0 6501 i

*> 0.0.0.0 0 32768 i

*> 120.0.0.0 113.1.1.1 0 6501 6512 i

*> 130.0.0.0/8 0.0.0.0 0 32768 i

*> 192.168.11.0 113.1.1.1 0 6501 6511 i

*> 192.168.12.0 113.1.1.1 0 6501 6511 i

*> 192.168.13.0 113.1.1.1 0 6501 6511 i

*> 192.168.14.0 113.1.1.1 0 6501 6511 i

*> 192.168.20.0 113.1.1.1 0 6501 6502 i

*> 192.168.30.0 113.1.1.1 0 6501 6503 i

*> 192.168.31.0 113.1.1.1 0 6501 6503 i

*> 192.168.32.0 113.1.1.1 0 6501 6503 i

*> 192.168.33.0 113.1.1.1 0 6501 6503 i

*> 192.168.40.0 113.1.1.1 0 6501 6504 i

*> 192.168.41.0 113.1.1.1 0 6501 6504 i

*> 192.168.42.0 113.1.1.1 0 6501 6504 i

*> 192.168.43.0 113.1.1.1 0 6501 6504 i

*> 192.168.50.0 113.1.1.1 0 6501 6505 i

*> 192.168.51.0 113.1.1.1 0 6501 6505 i

*> 192.168.52.0 113.1.1.1 0 6501 6505 i

*> 192.168.53.0 113.1.1.1 0 6501 6505 i

*> 192.168.60.0 113.1.1.1 0 6501 6506 i

*> 192.168.61.0 113.1.1.1 0 6501 6506 i

*> 192.168.62.0 113.1.1.1 0 6501 6506 i

*> 192.168.70.0 113.1.1.1 0 6501 6507 i

*> 192.168.71.0 113.1.1.1 0 6501 6507 i

*> 192.168.72.0 113.1.1.1 0 6501 6507 i

*> 192.168.73.0 113.1.1.1 0 6501 6507 i

*> 192.168.80.0 113.1.1.1 0 6501 6508 i

*> 192.168.81.0 113.1.1.1 0 6501 6508 i

*> 192.168.82.0 113.1.1.1 0 6501 6508 i

*> 192.168.83.0 113.1.1.1 0 6501 6508 i

*> 192.168.90.0 113.1.1.1 0 6501 6509 i

*> 192.168.91.0 113.1.1.1 0 6501 6509 i

*> 192.168.92.0 113.1.1.1 0 6501 6509 i

*> 192.168.93.0 113.1.1.1 0 6501 6509 i

*> 192.168.100.0 113.1.1.1 0 6501 6510 i

*> 192.168.101.0 113.1.1.1 0 6501 6510 i

*> 192.168.102.0 113.1.1.1 0 6501 6510 i

*> 192.168.103.0 113.1.1.1 0 6501 6510 i

*> 192.168.120.0 113.1.1.1 0 6501 6512 i

*> 192.168.121.0 113.1.1.1 0 6501 6512 i

*> 192.168.122.0 113.1.1.1 0 6501 6512 i

*> 192.168.123.0 113.1.1.1 0 6501 6512 i

*> 192.168.130.0 0.0.0.0 0 32768 i

R1-AS-6501#ping 192.168.20.1