why no BGP route in Generic Router in Packet Tracer?

[Maivoko]

I use DTE connect two Generic Router in packet tracer, but no BGP route

Router2#sh ip route

Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP

i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area

* - candidate default, U - per-user static route, o - ODR

P - periodic downloaded static route

Gateway of last resort is not set

C 192.168.0.0/24 is directly connected, Serial2/0

Router 2
conf t
hostname Router2
int f0/0
ip address 172.16.0.2 255.255.0.0
no shut
int s2/0
clock rate 2000000
ip address 192.168.0.2 255.255.255.0
no shut
end

Router 3
conf t
hostname Router3
int f0/0
ip address 10.10.1.2 255.0.0.0
no shut
int s2/0
clock rate 2000000
ip address 192.168.0.1 255.255.255.0
no shut
end

Router 2
conf t
router bgp 200
neighbor 192.168.0.1 remote-as 300
network 172.16.0.0
network 192.168.0.0
end

Router 3
conf t
router bgp 300
neighbor 192.168.0.2 remote-as 300
network 10.0.0.0
network 192.168.0.0
end

[Vinit Jain]

Two things to check:

1. Check if the BGP neighbor is up

2. Use the network statement with the subnet mask as below:

network 10.0.0.0 mask 255.0.0.0

Same for 192.168.0.0/24 network as well.

Unless the BGP neighbor is UP and advertising the prefix from router 3, Router 2 will not be able to see the route.

[Maivoko]

in router 3

has error

why both are EBGP but have this message

%Packet Tracer does not support internal BGP in this version. Only external neighbors are supported.

[Georg Pauwen]

Hello,

make sure the configs look as below:

Router 2

hostname Router2

!
interface FastEthernet0/0
ip address 172.16.0.2 255.255.0.0
!
interface Serial2/0
clock rate 2000000
ip address 192.168.0.2 255.255.255.0
!
router bgp 200
neighbor 192.168.0.1 remote-as 300
network 172.16.0.0 mask 255.255.0.0
network 192.168.0.0 mask 255.255.255.0

Router 3

hostname Router3

!
interface FastEthernet0/0
ip address 10.10.1.2 255.0.0.0
!
int Serial2/0
clock rate 2000000
ip address 192.168.0.1 255.255.255.0
!
router bgp 300
neighbor 192.168.0.2 remote-as 200
network 10.0.0.0 mask 255.0.0.0
network 192.168.0.0 mask 255.255.255.0

[Touhiduzzaman Eshan]

Your serial port and  FastEthernet port are not up u should use the No shutdown command .

[Maivoko]

I find error come from remote as using 300 in router 3 but not remote as 200

solved

[Maivoko]

[Maivoko]

EBGP already up, but why still no bgp route?

[Maivoko]

all are up but no BGP route

[Vinit Jain]

Make sure on Router 3, the interface fa0/0 is in UP state so that the route is present in the RIB (routing table) before it is advertised via BGP.

Also, if you want to practice BGP or other routing protocols, i would recommend using GNS3 or something like VIRL or EVE. 

[Maivoko]

succeed , it need to connect a PC to fa0/0

by the way, can packet tracer simulate internal BGP  such as

1. route reflector

2. weight, local preference,AS Path, origin MED these situation?