Bgp Backdoor

Front 1

In this network we run ebgp between rta and rtc and aslo between rtb and rtc. Between rta and rtb we run igp. Rta receive updates for 160 Network from which routers and which will be selected

Back 1

Rta will two updates for160 Network from two routing protocol from igp via rtb and rtc via ebgp. Rta will select path through rtc because of its shorter distance

Front 2

What are the distance bgp

Back 2

Local and internal 200
External 20

Front 3

Distance for rip igrp eigrp and ospf

Back 3

Rip 120
igrp 100
Eigrp 90
ospf 110

Front 4

Rta receive updates from rtb and rtc with what distance

Back 4

Rta receive update from rtc with distance of 20 And from rtb with a distance greter than 20

Front 5

How to change distance for bgp

Back 5

Distance bgp external intetnal lical

Front 6

Rta receive two updates for 160 Network. Which one it select and why

Back 6

Rta receive two updates from rtc and rtb. From rtc it receive updates with a distance of 20 And from rtb it receive update with a distance gretaer than 20. Between Rta and rtc we run ebg which has distance of 20 And rta and rtb we run igp which has a distance greater than 20. So rta will choose path through rtc because of its shorter distance

Front 7

In the network rta has choosen path through rtc because of its shorter distance but we want to select path through igp route via rtb how can we do this

Back 7

To select path through rtb via igp we have two options either we can change ebgp distance or igp distance which is not recommended or we can use bgp backdoor

Front 8

Why we use bgp backdoor

Back 8

To make igp route preferred route

Front 9

Need to configure bgp backdoor on rta

Back 9

Router rta
router eigrp 100
network 150,,,
router bgp 100
neigbour 2,2,2,1 remote-as 300
network 160,10,0,0 backdoor

rta will prefered update from eigrp with a distance of 90 even it has greater distance ebgp