config ure r 1 as 65146, peer with R5 and R3
config R5 in 6500 AS peer with with
IGP add loopback into IGP
All routers
ct
Router EIGRP 100
Network 150.1.0.0
IBGP
R1
router bgp 65146
bgp confederation identifier 100
neighbor 150.1.4.4 remote-as 65146
neighbor 150.1.4.4 update-source loopback 0
neighbor 150.1.6.6 remote-as 65146
neighbor 150.1.6.6 update-source loopback 0
R4
router bgp 65146
bgp confederation identifier 100
neighbor 150.1.1.1 remote-as 65146
neighbor 150.1.1.1 update-source loopback 0
neighbor 150.1.6.6 remote-as 65146
neighbor 150.1.6.6 update-source loopback 0
neighbor 204.12.1.254 remote-as 54
R6
router bgp 65146
bgp confederation identifier 100
neighbor 150.1.4.4 remote-as 65146
neighbor 150.1.4.4 update-source loopback 0
neighbor 150.1.1.1 remote-as 65146
neighbor 150.1.1.1 update-source loopback 0
neighbor 54.1.1.254 remote-as 54
--------------------------------------
R3
router bgp 65379
bgp confederation identifier 100
neighbor 150.1.7.7 remote-as 65379
neighbor 150.1.7.7 update-source loopback 0
neighbor 150.1.9.9 remote-as 65379
neighbor 150.1.9.9 update-source loopback 0
SW1
router bgp 65379
bgp confederation identifier 100
neighbor 150.1.3.3 remote-as 65379
neighbor 150.1.3.3 update-source loopback 0
neighbor 150.1.9.9 remote-as 65379
neighbor 150.1.9.9 update-source loopback 0
SW3
router bgp 65379
bgp confederation identifier 100
neighbor 150.1.3.3 remote-as 65379
neighbor 150.1.3.3 update-source loopback 0
neighbor 150.1.7.7 remote-as 65379
neighbor 150.1.7.7 update-source loopback 0
------------------------------------------
R5
router bgp 65508
bgp confederation identifier 100
neighbor 150.1.8.8 remote-as 65508
neighbor 150.1.8.8 update-source loopback 0
neighbor 150.1.10.10 remote-as 65508
neighbor 150.1.10.10 update-source loopback 0
SW2
router bgp 65508
bgp confederation identifier 100
neighbor 150.1.5.5 remote-as 65508
neighbor 150.1.5.5 update-source loopback 0
neighbor 150.1.10.10 remote-as 65508
neighbor 150.1.10.10 update-source loopback 0
SW4
router bgp 65508
bgp confederation identifier 100
neighbor 150.1.8.8 remote-as 65508
neighbor 150.1.8.8 update-source loopback 0
neighbor 150.1.5.5 remote-as 65508
neighbor 150.1.5.5 update-source loopback 0
-----------------------------------------
R1
router bgp 65146
bgp confederation identifier 100
neighbor 150.1.3.3 remote-as 65379
neighbor 150.1.3.3 update-source loopback 0
neighbor 150.1.3.3 disable-connected-check
neighbor 150.1.3.3 ebgp-multihop
neighbor 150.1.5.5 remote-as 65508
neighbor 150.1.5.5 update-source loopback 0
neighbor 150.1.5.5 disable-connected-check
bgp confederation peers 65379 65508
R3
router bgp 65379
bgp confederation identifier 100
neighbor 150.1.1.1 remote-as 65146
neighbor 150.1.1.1 update-source loopback 0
neighbor 150.1.1.1 disable-connected-check
neighbor 150.1.1.1 ebgp-multihop
neighbor 150.1.5.5 remote-as 65508
neighbor 150.1.5.5 update-source loopback 0
neighbor 150.1.5.5 disable-connected-check
bgp confederation peers 65508 65146
R5
router bgp 65508
bgp confederation identifier 100
neighbor 150.1.1.1 remote-as 65146
neighbor 150.1.1.1 update-source loopback 0
neighbor 150.1.1.1 disable-connected-check
neighbor 150.1.3.3 remote-as 65379
neighbor 150.1.3.3 update-source loopback 0
neighbor 150.1.3.3 disable-connected-check
bgp confederation peers 65379 65146
EBGP
R5
router bgp 65508
neighbor 150.1.2.2 remote-as 200
neighbor 150.1.2.2 update-source loopback 0
neighbor 150.1.2.2 disable-connected-check
R3
router bgp 65379
neighbor 150.1.2.2 remote-as 200
neighbor 150.1.2.2 update-source loopback 0
neighbor 150.1.2.2 disable-connected-check
R2
router bgp 200
neighbor 150.1.3.3 remote-as 100
neighbor 150.1.3.3 update-source loopback 0
neighbor 150.1.5.5 remote-as 100
neighbor 150.1.5.5 update-source loopback 0
neighbor 192.10.1.254 remote-as 254
neighbor 150.1.5.5 update-source Ethernet0/0
neighbor 192.10.1.254 password CISCO
R6
router bgp 65146
neighbor 54.1.1.254 remote-as 54
neighbor 54.1.1.254 update Serial1/0
R4
router bgp 65146
neighbor 204.12.1.254 remote-as 54
neighbor 204.12.1.254 update-source Ethernet0/0
---------------------------------------------
ISSUE 1
R1 Not dosnt have the best path for any routes
Solution
Advertise the external network to EIGRP for R6 and R4
R6
router eigrp 100
network 155.1.0.0
R4
router eigrp 100
network 204.12.1.0
------------------------------------------
All routers
ct
Router bgp xxxxx
network 150.1.0.0 mask 255.255.255.0
-----------------------------------------
ping lo of all router from all router
ping the route learned from external routers
check if R2 is getting nay private AS in AS pat of routes learnt from AS 54
Network Next Hop Metric LocPrf Weight Path
* 28.119.16.0/24 150.1.5.5 0 100 54 i
*> 150.1.3.3 0 100 54 i
* 28.119.17.0/24 150.1.5.5 0 100 54 i
*> 150.1.3.3 0 100 54 i
* 112.0.0.0 150.1.5.5 0 100 54 50 60 i
*> 150.1.3.3 0 100 54 50 60 i
* 113.0.0.0 150.1.5.5 0 100 54 50 60 i
*> 150.1.3.3 0 100 54 50 60 i
* 114.0.0.0 150.1.5.5 0 100 54 i
*> 150.1.3.3 0 100 54 i
* 115.0.0.0 150.1.5.5 0 100 54 i
*> 150.1.3.3 0 100 54 i
* 116.0.0.0 150.1.5.5 0 100 54 i
*> 150.1.3.3 0 100 54 i
Network Next Hop Metric LocPrf Weight Path
* 117.0.0.0 150.1.5.5 0 100 54 i
*> 150.1.3.3 0 100 54 i
* 118.0.0.0 150.1.5.5 0 100 54 i
*> 150.1.3.3 0 100 54 i
* 119.0.0.0 150.1.5.5 0 100 54 i
*> 150.1.3.3 0 100 54 i
*> 205.90.31.0 192.10.1.254 0 0 254 ?
*> 220.20.3.0 192.10.1.254 0 0 254 ?
*> 222.22.2.0 192.10.1.254 0 0 254 ?
not
Using Local Preference different paths can be selected ON R4,R6,R5,R3