JUNOS_BGP5
BGP Communityの確認
構成は↓
R1→AS1、R2→AS2、R3→AS3 として実施
Ciscoは過去に調べた記憶があるので、今回はJuniperのみ
R1
set routing-options router-id 1.1.1.1
set routing-options autonomous-system 1
set protocols bgp group eBGP type external
set protocols bgp group eBGP export to-eBGP
set protocols bgp group eBGP neighbor 10.1.1.254 peer-as 2
set policy-options policy-statement to-eBGP term 1 from route-filter 4.4.4.4/32 exact
set policy-options policy-statement to-eBGP term 1 then community add EXT
set policy-options policy-statement to-eBGP term 1 then accept
set policy-options community EXT members 1:200
R3で確認
admin@R3# run show route protocol bgp 4.4.4.4 detail
inet.0: 6 destinations, 6 routes (6 active, 0 holddown, 0 hidden)
4.4.4.4/32 (1 entry, 1 announced)
*BGP Preference: 170/-101
Next hop type: Router, Next hop index: 556
Address: 0xcd815b0
Next-hop reference count: 2
Source: 10.1.2.1
Next hop: 10.1.2.1 via ge-0/0/1.0, selected
Session Id: 0x0
State: <Active Ext>
Local AS: 3 Peer AS: 2
Age: 21
Validation State: unverified
Task: BGP_2.10.1.2.1
Announcement bits (1): 0-KRT
AS path: 2 1 I
Communities: 1:200
Accepted
Localpref: 100
Router ID: 2.2.2.2