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=====Cisco Books - CCIE Bridging the Gap: Chapter 10 - Lab 10-2=====
====Parameters==== 
This lab has the following parameters:
  * RIPv2 as the underlay, to provide a route between loopbacks.
  * iBGP as the overlay to share routes between four routers.
  * The loopback addresses are used as the peering between the iBGP neighbors.
  * BGP peer groups are used for all neighbors.
  * BGP neighbors have authentication configured.

{{:cisco:books:ccie_bridging_the_gap:ch10:lab_10-2.jpg?300 |}}

====Initial Configurations====
__r1__
<code>en
conf t
!
hostname r1
interface Loopback0
 ip address 1.1.1.1 255.0.0.0
!
interface GigabitEthernet0/0
 ip address 12.1.1.1 255.255.255.0
 no shut
!
interface GigabitEthernet0/1
 ip address 13.1.1.1 255.255.255.0
 no shut
!
line con 0
logg syn
exec-timeout 0 0
!
end
wr</code>
__r2__
<code>en
conf t
!
hostname r2
interface Loopback0
 ip address 2.2.2.2 255.0.0.0
!
interface GigabitEthernet0/0
 ip address 12.1.1.2 255.255.255.0
 no shut
!
line con 0
logg syn
exec-timeout 0 0
!
end
wr</code>
__r3__
<code>en
conf t
!
hostname r3
interface Loopback0
 ip address 3.3.3.3 255.0.0.0
!
interface GigabitEthernet0/1
 ip address 13.1.1.3 255.255.255.0
 no shut
!
line con 0
logg syn
exec-timeout 0 0
!
end
wr</code>

====End of Lab 10-1 Configurations====

__r1__
<code>hostname r1
interface Loopback0
 ip address 1.1.1.1 255.0.0.0
!
interface Loopback1
 ip address 192.168.1.1 255.255.255.0
!
interface GigabitEthernet0/0
 ip address 10.1.1.1 255.255.255.0
 no shut
!
router rip
 version 2
 network 1.0.0.0
 network 10.0.0.0
 no auto-summary
!
router bgp 100
 bgp router-id 1.1.1.1
 network 192.168.1.1
 neighbor tst peer-group
 neighbor tst remote-as 100
 neighbor tst password cisco
 neighbor tst update-source Loopback0
 neighbor 2.2.2.2 peer-group tst
 neighbor 3.3.3.3 peer-group tst
 neighbor 4.4.4.4 peer-group tst</code>
__r2__
<code>hostname r2
interface Loopback0
 ip address 2.2.2.2 255.0.0.0
!
interface Loopback1
 ip address 192.168.2.2 255.255.255.0
!
interface GigabitEthernet0/0
 ip address 10.1.1.2 255.255.255.0
 no shut
!
router rip
 version 2
 network 2.0.0.0
 network 10.0.0.0
 no auto-summary
!
router bgp 100
 bgp router-id 2.2.2.2
 network 192.168.2.2
 neighbor tst peer-group
 neighbor tst remote-as 100
 neighbor tst password cisco
 neighbor tst update-source Loopback0
 neighbor 1.1.1.1 peer-group tst
 neighbor 3.3.3.3 peer-group tst
 neighbor 4.4.4.4 peer-group tst</code>
__r3__
<code>hostname r3
interface Loopback0
 ip address 3.3.3.3 255.0.0.0
!
interface Loopback1
 ip address 192.168.3.3 255.255.255.0
!
interface GigabitEthernet0/0
 ip address 10.1.1.3 255.255.255.0
 no shut
!
router rip
 version 2
 network 3.0.0.0
 network 10.0.0.0
 no auto-summary
!
router bgp 100
 bgp router-id 3.3.3.3
 network 192.168.3.3
 neighbor tst peer-group
 neighbor tst remote-as 100
 neighbor tst password cisco
 neighbor tst update-source Loopback0
 neighbor 1.1.1.1 peer-group tst
 neighbor 2.2.2.2 peer-group tst
 neighbor 4.4.4.4 peer-group tst</code>
__r4__
<code>hostname r4
interface Loopback0
 ip address 4.4.4.4 255.0.0.0
!
interface Loopback1
 ip address 192.168.4.4 255.255.255.0
!
interface GigabitEthernet0/0
 ip address 10.1.1.4 255.255.255.0
 no shut
!
router rip
 version 2
 network 4.0.0.0
 network 10.0.0.0
 no auto-summary
!
router bgp 100
 bgp router-id 4.4.4.4
 network 192.168.4.4
 neighbor tst peer-group
 neighbor tst remote-as 100
 neighbor tst password cisco
 neighbor tst update-source Loopback0
 neighbor 1.1.1.1 peer-group tst
 neighbor 2.2.2.2 peer-group tst
 neighbor 3.3.3.3 peer-group tst</code>

====Verification on r1====
<code>r1#show ip bgp summary
BGP router identifier 1.1.1.1, local AS number 100
BGP table version is 9, main routing table version 9

Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
2.2.2.2         4          100      37      37        9    0    0 00:30:57        0
3.3.3.3         4          100       5       8        9    0    0 00:02:46        0
4.4.4.4         4          100       7       9        9    0    0 00:04:14        0</code>
<code>r1#show ip bgp peer-group tst
BGP peer-group is tst,  remote AS 100
  BGP version 4
  Neighbor sessions:
    0 active, is not multisession capable (disabled)
  Do log neighbor state changes (via global configuration)
  Default minimum time between advertisement runs is 0 seconds

 For address family: IPv4 Unicast
  BGP neighbor is tst, peer-group internal, members:
  2.2.2.2 3.3.3.3 4.4.4.4
  Index 0, Advertise bit 0
  Update messages formatted 0, replicated 0
  Number of NLRIs in the update sent: max 0, min 0</code>

====Backlinks====
[[:cisco|Cisco]]\\ 
[[:cisco:books|Cisco Books]]\\ 
[[:cisco:books:ccie_bridging_the_gap|CCIE Briding the Gap]]\\ 
[[:cisco:books:ccie_bridging_the_gap:ch10|CCIE Briding the Gap - Chapter 10]]\\
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