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Question about AS loop for instance-import

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  • 1.  Question about AS loop for instance-import

    Posted 01-03-2022 05:43
    I have two virtual routers as follows:
    set routing-instances CE2-3 instance-type virtual-router
    set routing-instances CE2-3 interface ge-0/0/6.320
    set routing-instances CE2-3 interface lo0.12
    set routing-instances CE2-3 routing-options instance-import CE2-3-rib-import
    set routing-instances CE2-3 protocols bgp group ToR4 type external
    set routing-instances CE2-3 protocols bgp group ToR4 local-as 64600
    set routing-instances CE2-3 protocols bgp group ToR4 neighbor 192.168.0.77 peer-as 54591
    
    set policy-options policy-statement CE2-3-bgp-export term 1 from protocol static
    set policy-options policy-statement CE2-3-bgp-export term 1 then accept
    
    set routing-instances CE2-4 instance-type virtual-router
    set routing-instances CE2-4 interface ge-0/0/7.321
    set routing-instances CE2-4 interface lo0.13
    set routing-instances CE2-4 routing-options autonomous-system 64600
    set routing-instances CE2-4 routing-options instance-import CE2-4-rib-import
    set routing-instances CE2-4 protocols bgp group ToR5 type external
    set routing-instances CE2-4 protocols bgp group ToR5 neighbor 192.168.0.81 peer-as 54591
    
    set policy-options policy-statement CE2-4-bgp-export term 1 from protocol static
    set policy-options policy-statement CE2-4-bgp-export term 1 then accept
    
    
    
    
    ​

    I happened to configure AS in two different ways, I thought they are the same.  But all the routes from CE2-3 are imported to CE2-4,  the routes from CE2-4 are hidden in CE2-3 as follows:

    root@CE2-3-4# run show route 192.168.0.80
    
    CE2-4.inet.0: 14 destinations, 14 routes (14 active, 0 holddown, 0 hidden)
    + = Active Route, - = Last Active, * = Both
    
    192.168.0.80/30    *[Direct/0] 15:17:43
                        > via ge-0/0/7.321
    
    [edit]
    root@CE2-3-4# run show route hidden 192.168.0.80 extensive
    
    CE2-3.inet.0: 14 destinations, 14 routes (7 active, 0 holddown, 7 hidden)
    192.168.0.80/30 (1 entry, 0 announced)
             Direct
                    Next hop type: Interface
                    Address: 0x940d564
                    Next-hop reference count: 2
                    Next hop: via ge-0/0/7.321, selected
                    State: <Secondary Hidden Int>
                    Local AS: 64600
                    Age: 8:13:08
                    Validation State: unverified
                    Task: IF
                    AS path: 64600 I (Looped: 64600)
                    Primary Routing Table CE2-4.inet.0
    
    [edit]
    

    Anyone can shed some light on this ?

    thanks !!