Ervin Taufik

Kali ini kita lagi coba2 build bgp dgn 3 router dalam 1 network yaitu 172.16.0.192/28 (tanpa filtering) just fur newbies.

JunOS : 172.16.0.202/28 ASN 2020
Quagga : 172.16.0.200/28 ASN 1010
AdvNetwork : 192.192.0.0/16
Cisco : 172.16.0.204/28 ASN 3030
AdvNetwork : 192.100.0.0/16

Kita Asumsikan bahwa quagga & Cisco sudah ready dgn config BGP nya, jadi kita tinggal coba step-step config di junOS tanpa filtering ;

config untuk peer asn 3030 (cisco)
ebenz@junOS> show bgp summary
BGP is not running
ebenz@junOS> edit
Entering configuration mode
[edit]
ebenz@junOS# edit protocols bgp
ebenz@junOS# set group ASN-3030 type external (peer as cisco)
[edit protocols bgp]
ebenz@junOS# set group ASN-3030 peer-as 3030
[edit protocols bgp]
ebenz@junOS# set group ASN-3030 neighbor 172.16.0.200
[edit protocols bgp]
ebenz@junOS# show
group ASN-3030 {
type external;
peer-as 3030;
neighbor 172.16.0.200;
}

config untuk peer asn 1010 (quagga)
[edit protocols bgp]
ebenz@junOS# set group ASN-1010 type external
[edit protocols bgp]
ebenz@junOS# set group ASN-1010 peer-as 1010
[edit protocols bgp]
ebenz@junOS# set group ASN-1010 neighbor 172.16.0.204
[edit protocols bgp]
ebenz@junOS# commit
commit complete

tinggal kita lihat status BGP ;
=====================
ebenz@junOS# run show bgp summary
Groups: 2 Peers: 2 Down peers: 2
Table Tot Paths Act Paths Suppressed History Damp State Pending
inet.0 0 0 0 0 0 0
Peer AS InPkt OutPkt OutQ Flaps Last Up/Dwn State|#Active/Received/Damped…
172.16.0.200 3030 0 1 0 0 40 Active
172.16.0.204 1010 0 2 0 0 40 Active

hemm Active .., ups ternyata IP kebalik untuk peer 3030 harusnya IP 172.16.0.204 . Nope kita rename
=============================================================================

ebenz@junOS# edit group ASN-3030
[edit protocols bgp group ASN-3030]
ebenz@junOS# rename neighbor 172.16.0.200 to neighbor 172.16.0.204
[edit protocols bgp group ASN-3030]
ebenz@junOS# up
[edit protocols bgp]
ebenz@junOS# edit group ASN-1010
[edit protocols bgp group ASN-1010]
ebenz@junOS# rename neighbor 172.16.0.204 to neighbor 172.16.0.200
[edit protocols bgp group ASN-1010]
ebenz@junOS# commit
commit complete
[edit protocols bgp group ASN-1010]
[edit protocols bgp]
ebenz@junOS# show
group ASN-3030 {
type external;
peer-as 3030;
neighbor 172.16.0.204;
}
group ASN-1010 {
type external;
peer-as 1010;
neighbor 172.16.0.200;
}
[edit protocols bgp]
ebenz@junOS#

kita lihat status BGP nya kembali
==========================

ebenz@junOS# run show bgp summary
Groups: 2 Peers: 2 Down peers: 0
Table Tot Paths Act Paths Suppressed History Damp State Pending
inet.0 9 8 0 0 0 0
Peer AS InPkt OutPkt OutQ Flaps Last Up/Dwn State|#Active/Received/Damped…
172.16.0.200 1010 4 3 0 0 12 8/9/0 0/0/0
172.16.0.204 3030 1 5 0 0 0 0/0/0 0/0/0

sebelum filtering kita coba lihat route yg di dapat dari cisco dan quagga;
======================================================

ebenz@junOS> show route advertising-protocol bgp 172.16.0.200

inet.0: 14 destinations, 19 routes (14 active, 0 holddown, 0 hidden)
Prefix Nexthop MED Lclpref AS path
* 172.16.0.0/16 172.16.0.204 3030 I
* 192.192.191.0/24 172.16.0.204 3030 I
* 192.192.192.0/24 172.16.0.204 3030 I
* 192.192.193.0/24 172.16.0.204 3030 I
* 192.192.194.0/24 172.16.0.204 3030 I
* 192.192.195.0/24 172.16.0.204 3030 I

ebenz@junOS> show route advertising-protocol bgp 172.16.0.204

inet.0: 14 destinations, 19 routes (14 active, 0 holddown, 0 hidden)
Prefix Nexthop MED Lclpref AS path
* 192.100.1.0/24 172.16.0.200 1010 ?
* 192.100.2.0/24 172.16.0.200 1010 ?
* 192.100.3.0/24 172.16.0.200 1010 ?
* 192.100.4.0/24 172.16.0.200 1010 ?
* 192.100.5.0/24 172.16.0.200 1010 ?