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BGP 사용자 가이드
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BGP 자동 검색된 인접 항목

date_range 19-Jan-25

BGP 자동 검색 인접 항목 이해

BGP 자동 검색 인접 항목 사용 원격 또는 로컬 인접 IP 주소를 지정하는 대신 인터페이스별로 BGP 피어링을 구성할 수 있습니다.

라우터 간에 BGP 세션을 설정하려면 BGP 그룹과 피어를 주소별로 명시적으로 구성해야 합니다 . BGP 피어링 세션 에서는 TCP 통신의 엔드포인트에 대한 소스 및 대상 IP 주소를 식별 해야 합니다. 따라서 이러한 주소를 명시적으로 구성하는 것은 네트워크 확장에 장애가 되며 잘못 구성할 가능성이 있습니다.

BGP 구성을 간소화하기 위해 BGP에서 피어별 주소를 구성할 필요가 없습니다. BGP 자동 검색 인접 항목 사용 원격 또는 로컬 인접 IP 주소를 지정하는 대신 인터페이스별로 BGP 피어링을 구성할 수 있습니다. 여기에는 TCP 피어링 세션에서 사용할 IP 주소를 검색하기 위한 암시적 또는 프로토콜 메커니즘의 사용이 포함됩니다.

그림 1: BGP 자동 검색 인접 항목 BGP 자동 검색 인접 항목
주:

피어링 동작 및 주소 사용은 인터페이스 주소에 따라 피어링이 변경되지 않도록 명시적으로 구성되어야 합니다 구성 또는 주소 유효성으로 인한 변경(예: IPv6 DAD(Duplicate Address Detection)).

BGP는 구성에 따라 피어링할 주소 패밀리를 결정합니다. 피어링 세션은 결정된 패밀리에 대한 인터페이스 주소의 가용성에 따라 시작됩니다. 피어 link-local 주소는 IPv6 RFC4861(neighbor discovery)를 사용하여 검색되며 해당 인접 라우터에 대한 BGP 세션을 생성합니다. IPv6 인터페이스에 주소가 구성되지 않은 경우에도 링크-로컬 주소가 생성됩니다.

주:

이 기능이 작동하려면 IPv6 인접 항목 검색을 사용하도록 설정해야 합니다.

BGP 자동 검색 인접 항목의 이점

  • 단일 홉 외부 BGP(EBGP)에 대한 IGP 구축 간소화

  • IP 주소 대신 인터페이스 및 인터페이스 범위로 인접 항목을 구성합니다

  • 동적 이웃 그룹으로 양쪽의 구성 최소화

제한

이 기능에는 다음과 같은 제한 사항이 있습니다.

  • 범위가 지정된 BGP link-local 주소는 현재 인접 범위 허용을 지원하지 않습니다.

  • BGP 자동 검색된 이웃 기능은 IBGP 또는 다중 홉 EBGP를 지원하지 않습니다.

  • BGP 자동 검색 인접 라우터는 지정된 인터페이스에서 둘 이상의 원격 인접 라우터를 검색하거나 피어링하는 것을 지원하지 않습니다.

예: BGP 자동 검색 인접 항목 구성

이 예에서는 BGP 자동 검색 인접 항목을 구성하는 방법을 보여 줍니다.

개요

Junos OS 릴리스 21.1R1부터 IPv6 ND(Neighbor Discovery Protocol)를 사용하여 BGP 자동 검색 이웃을 지원합니다. 이 기능을 통해 BGP는 직접 연결된 인접 라우터의 link-local IPv6 주소를 사용하여 피어 인접 세션을 만들 수 있습니다. 원격 또는 로컬 인접 IP 주소를 지정할 필요가 없습니다.

토폴로지

다음 그림에서는 단순화된 샘플 토폴로지를 보여 줍니다.

요구 사항

이 예에서 사용되는 하드웨어 및 소프트웨어 구성 요소는 다음과 같습니다.

MX 시리즈 라우터

Junos OS 릴리스 21.1R1 이상

구성

CLI 빠른 구성

이 예제를 빠르게 구성하려면 다음 명령을 복사하여 텍스트 파일에 붙여 넣은 다음 줄 바꿈을 제거하고, 네트워크 구성과 일치하는 데 필요한 세부 정보를 변경한 다음, 명령을 복사하여 [edit] 계층 수준에서 CLI에 붙여넣습니다.

VM1

content_copy zoom_out_map
set interfaces interface-range tor-to-leaf member ge-0/0/4
set interfaces interface-range tor-to-leaf unit 0 family inet6
set interfaces ge-0/0/4 unit 0 family inet address 192.168.1.1/24
set interfaces lo0 unit 0 family inet address 192.168.30.1/32
set interfaces lo0 unit 0 family inet6 address 2001:db8:70::1/128
set policy-options policy-statement DIRECT-RTS from protocol direct
set policy-options policy-statement DIRECT-RTS then accept
set policy-options policy-statement lb then load-balance per-packet
set policy-options as-list a-list members 1-65535
set routing-options autonomous-system 64500
set routing-options forwarding-table export lb
set routing-options forwarding-table ecmp-fast-reroute
set protocols router-advertisement interface tor-to-leaf
set protocols bgp group autodisc family inet unicast extended-nexthop
set protocols bgp group autodisc family inet6 unicast
set protocols bgp group autodisc export DIRECT-RTS
set protocols bgp group autodisc multipath multiple-as
set protocols bgp group autodisc dynamic-neighbor ndp peer-auto-discovery family inet6 ipv6-nd
set protocols bgp group autodisc dynamic-neighbor ndp peer-auto-discovery interface tor-to-leaf
set protocols bgp group autodisc peer-as-list a-list
set protocols bgp group to-leaf-v4 family inet unicast extended-nexthop
set protocols bgp group to-leaf-v4 export DIRECT-RTS
set protocols bgp group to-leaf-v4 local-as 64500
set protocols bgp group to-leaf-v4 neighbor 192.168.1.2 peer-as 64496

VM2

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set interfaces interface-range tor-to-leaf member ge-0/0/4
set interfaces interface-range tor-to-leaf unit 0 family inet6
set interfaces ge-0/0/4 unit 0 family inet address 192.168.2.1/24
set interfaces lo0 unit 0 family inet address 192.168.30.2/32
set interfaces lo0 unit 0 family inet6 address 2001:db8:60::1/128
set policy-options policy-statement DIRECT-RTS from protocol direct
set policy-options policy-statement DIRECT-RTS then accept
set policy-options policy-statement lb then load-balance per-packet
set policy-options as-list a-list members 1-65535
set routing-options autonomous-system 64501
set routing-options forwarding-table export lb
set routing-options forwarding-table ecmp-fast-reroute
set protocols router-advertisement interface tor-to-leaf
set protocols bgp group autodisc family inet unicast extended-nexthop
set protocols bgp group autodisc family inet6 unicast
set protocols bgp group autodisc export DIRECT-RTS
set protocols bgp group autodisc multipath multiple-as
set protocols bgp group autodisc dynamic-neighbor ndp peer-auto-discovery family inet6 ipv6-nd
set protocols bgp group autodisc dynamic-neighbor ndp peer-auto-discovery interface tor-to-leaf
set protocols bgp group autodisc peer-as-list a-list
set protocols bgp group to-leaf-v4 family inet unicast extended-nexthop
set protocols bgp group to-leaf-v4 export DIRECT-RTS
set protocols bgp group to-leaf-v4 local-as 64501
set protocols bgp group to-leaf-v4 neighbor 192.168.2.2 peer-as 64497

리프 1

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set interfaces interface-range to-spine member "ge-0/0/[0-4]"
set interfaces interface-range to-spine unit 0 family inet
set interfaces interface-range to-spine unit 0 family inet6
set interfaces ge-0/0/4 unit 0 family inet address 192.168.1.2/24
set interfaces lo0 unit 0 family inet address 192.168.10.1/32
set interfaces lo0 unit 0 family inet6 address 2001:db8:90::1/128
set policy-options policy-statement DIRECT-RTS from protocol direct
set policy-options policy-statement DIRECT-RTS then accept
set policy-options policy-statement lb then load-balance per-packet
set policy-options as-list a-list members 1-65535
set routing-options autonomous-system 64496
set routing-options forwarding-table export lb
set routing-options forwarding-table ecmp-fast-reroute
set protocols router-advertisement interface to-spine max-advertisement-interval 9
set protocols router-advertisement interface to-spine min-advertisement-interval 3
set protocols bgp group autodisc family inet unicast extended-nexthop
set protocols bgp group autodisc family inet6 unicast
set protocols bgp group autodisc export DIRECT-RTS
set protocols bgp group autodisc multipath multiple-as
set protocols bgp group autodisc dynamic-neighbor ndp peer-auto-discovery family inet6 ipv6-nd
set protocols bgp group autodisc dynamic-neighbor ndp peer-auto-discovery interface to-spine
set protocols bgp group autodisc peer-as-list a-list
set protocols bgp group to-crpd-v4 family inet unicast extended-nexthop
set protocols bgp group to-crpd-v4 export DIRECT-RTS
set protocols bgp group to-crpd-v4 neighbor 192.168.1.1 peer-as 64500

리프 2

content_copy zoom_out_map
set interfaces interface-range to-spine member "ge-0/0/[0-4]"
set interfaces interface-range to-spine unit 0 family inet
set interfaces interface-range to-spine unit 0 family inet6
set interfaces ge-0/0/4 unit 0 family inet address 192.168.2.2/24
set interfaces lo0 unit 0 family inet address 192.168.10.2/32
set interfaces lo0 unit 0 family inet6 address 2001:db8:90::2/128
set policy-options policy-statement DIRECT-RTS from protocol direct
set policy-options policy-statement DIRECT-RTS then accept
set policy-options policy-statement lb then load-balance per-packet
set policy-options as-list a-list members 1-65535
set routing-options autonomous-system 64497
set routing-options forwarding-table export lb
set routing-options forwarding-table ecmp-fast-reroute
set protocols router-advertisement interface to-spine max-advertisement-interval 9
set protocols router-advertisement interface to-spine min-advertisement-interval 3
set protocols bgp group autodisc family inet unicast extended-nexthop
set protocols bgp group autodisc family inet6 unicast
set protocols bgp group autodisc export DIRECT-RTS
set protocols bgp group autodisc multipath multiple-as
set protocols bgp group autodisc dynamic-neighbor ndp peer-auto-discovery family inet6 ipv6-nd
set protocols bgp group autodisc dynamic-neighbor ndp peer-auto-discovery interface to-spine
set protocols bgp group autodisc peer-as-list a-list
set protocols bgp group to-crpd-v4 family inet unicast extended-nexthop
set protocols bgp group to-crpd-v4 export DIRECT-RTS
set protocols bgp group to-crpd-v4 neighbor 192.168.2.1 peer-as 64501

스파인 1

content_copy zoom_out_map
set interfaces interface-range to-leaf member "ge-0/0/[0-3]"
set interfaces interface-range to-leaf unit 0 family inet
set interfaces interface-range to-leaf unit 0 family inet6
set interfaces lo0 unit 0 family inet address 192.168.20.1/32
set interfaces lo0 unit 0 family inet6 address 2001:db8:80::1/128
set policy-options policy-statement DIRECT-RTS from protocol direct
set policy-options policy-statement DIRECT-RTS then accept
set policy-options policy-statement lb then load-balance per-packet
set policy-options as-list a-list members 1-65535
set routing-options autonomous-system 64498
set routing-options forwarding-table export lb
set routing-options forwarding-table ecmp-fast-reroute
set protocols router-advertisement interface to-leaf max-advertisement-interval 9
set protocols router-advertisement interface to-leaf min-advertisement-interval 3
set protocols bgp group autodisc family inet unicast extended-nexthop
set protocols bgp group autodisc family inet6 unicast
set protocols bgp group autodisc export DIRECT-RTS
set protocols bgp group autodisc multipath multiple-as
set protocols bgp group autodisc dynamic-neighbor ndp peer-auto-discovery family inet6 ipv6-nd
set protocols bgp group autodisc dynamic-neighbor ndp peer-auto-discovery interface to-leaf
set protocols bgp group autodisc peer-as-list a-list

스파인 2

content_copy zoom_out_map
set interfaces interface-range to-leaf member "ge-0/0/[0-3]"
set interfaces interface-range to-leaf unit 0 family inet
set interfaces interface-range to-leaf unit 0 family inet6
set interfaces lo0 unit 0 family inet address 192.168.20.2/32
set interfaces lo0 unit 0 family inet6 address 2001:db8:80::2/128
set policy-options policy-statement DIRECT-RTS from protocol direct
set policy-options policy-statement DIRECT-RTS then accept
set policy-options policy-statement lb then load-balance per-packet
set policy-options as-list a-list members 1-65535
set routing-options autonomous-system 64499 
set routing-options forwarding-table export lb
set routing-options forwarding-table ecmp-fast-reroute
set protocols router-advertisement interface to-leaf max-advertisement-interval 9
set protocols router-advertisement interface to-leaf min-advertisement-interval 3
set protocols bgp group autodisc family inet unicast extended-nexthop
set protocols bgp group autodisc family inet6 unicast
set protocols bgp group autodisc export DIRECT-RTS
set protocols bgp group autodisc multipath multiple-as
set protocols bgp group autodisc dynamic-neighbor ndp peer-auto-discovery family inet6 ipv6-nd
set protocols bgp group autodisc dynamic-neighbor ndp peer-auto-discovery interface to-leaf
set protocols bgp group autodisc peer-as-list a-list

VM1 구성

BGP 자동 검색 인접 항목을 구성하려면 VM1에서 다음 단계를 수행합니다.

  1. 디바이스 인터페이스를 구성합니다.

    content_copy zoom_out_map
    user@VM1# set interfaces interface-range tor-to-leaf member ge-0/0/4
    user@VM1# set interfaces interface-range tor-to-leaf unit 0 family inet6
  2. 루프백 인터페이스를 생성하고 IP 주소를 구성합니다.

    content_copy zoom_out_map
    user@VM1# set interfaces lo0 unit 0 family inet address 192.168.30.1/32      
    user@VM1# set interfaces lo0 unit 0 family inet6 address 2001:db8:70::1/128
    
  3. 라우팅 정책을 활성화합니다.

    content_copy zoom_out_map
    user@VM1# set policy-options policy-statement DIRECT-RTS from protocol direct
    user@VM1# set policy-options policy-statement DIRECT-RTS then accept
    user@VM1# set policy-options policy-statement lb then load-balance per-packet
    user@VM1# set policy-options as-list a-list members 1-65535
    
  4. AS(Autonomous System) 번호 구성

    content_copy zoom_out_map
    user@VM1# set routing-options autonomous-system 64500 
  5. 패킷별 정책을 적용하여 트래픽 및 ECMP의 로드 밸런싱을 활성화합니다.

    content_copy zoom_out_map
    user@VM1# set routing-options forwarding-table export lb
    user@VM1# set routing-options forwarding-table ecmp-fast-reroute
    
  6. BGP를 구성하여 내부 및 외부 피어링 세션을 설정합니다.

    content_copy zoom_out_map
    user@VM1# set protocols bgp group autodisc family inet unicast extended-nexthop
    user@VM1# set protocols bgp group autodisc family inet6 unicast
    user@VM1# set protocols bgp group autodisc export DIRECT-RTS
    user@VM1# set protocols bgp group autodisc multipath multiple-as
    user@VM1# set protocols bgp group autodisc dynamic-neighbor ndp peer-auto-discovery family inet6 ipv6-nd
    user@VM1# set protocols bgp group autodisc dynamic-neighbor ndp peer-auto-discovery interface tor-to-leaf
    user@VM1# set protocols bgp group autodisc peer-as-list a-list
    user@VM1# set protocols bgp group to-leaf-v4 family inet unicast extended-nexthop
    user@VM1# set protocols bgp group to-leaf-v4 export DIRECT-RTS
    user@VM1# set protocols bgp group to-leaf-v4 local-as 5
    user@VM1# set protocols bgp group to-leaf-v4 neighbor 192.168.1.2 peer-as 1
    
  7. 디바이스 구성을 완료하면 해당 구성을 커밋합니다.

    content_copy zoom_out_map
    user@VM1# commit

결과

구성 모드에서 show interfaces, show protocols, show policy-options 및 show routing-options 명령을 입력하여 구성을 확인합니다. 출력 결과가 의도한 구성대로 표시되지 않으면 이 예의 지침을 반복하여 구성을 수정하십시오.

content_copy zoom_out_map
[edit]
user@VM1# show interfaces
interface-range tor-to-leaf {
    member ge-0/0/4;
    unit 0 {
        family inet6;
    }
}
ge-0/0/4 {
    unit 0 {
        family inet {
            address 192.168.1.1/24;
        }
    }
}
lo0 {
    unit 0 {
        family inet {
            address 192.168.30.1/32;
        }
        family inet6 {
            address 2001:db8:70::1/128;
        }
    }
}
content_copy zoom_out_map
[edit]
user@VM1# show protocols
router-advertisement {
    interface tor-to-leaf;
}
bgp {
    group autodisc {
        family inet {
            unicast {
                extended-nexthop;
            }
        }
        family inet6 {
            unicast;
        }
        export DIRECT-RTS;
        multipath {
            multiple-as;
        }
        dynamic-neighbor ndp {
            peer-auto-discovery {
                family inet6 {
                    ipv6-nd;
                }
                interface tor-to-leaf;
            }
        }
        peer-as-list a-list;
    }
    group to-leaf-v4 {
        family inet {
            unicast {
                extended-nexthop;
            }
        }
        export DIRECT-RTS;
        local-as 64500;
        neighbor 192.168.1.2 {
            peer-as 64496;
        }
    }
}
content_copy zoom_out_map
[edit]
user@VM1# show policy-options
policy-statement DIRECT-RTS {
    from protocol direct;
    then accept;
}
policy-statement lb {
    then {
        load-balance per-packet;
    }
}
as-list a-list members 1-65535;
content_copy zoom_out_map
[edit]
user@VM1# show policy-options
policy-statement DIRECT-RTS {
    from protocol direct;
    then accept;
}
policy-statement lb {
    then {
        load-balance per-packet;
    }
}
as-list a-list members 1-65535;

[
content_copy zoom_out_map
edit]
user@VM1# show routing-options
autonomous-system 64500;
forwarding-table {
    export lb;
    ecmp-fast-reroute;
}

검증

구성이 올바르게 작동하고 있는지 확인합니다.

자동 검색된 이웃 확인

목적

자동 검색된 BGP 인접 라우터를 확인합니다.

작업

운영 모드에서 명령을 실행합니다 show bgp summary auto-discovered

리프1

content_copy zoom_out_map
user@Leaf1> show bgp summary auto-discovered
Threading mode: BGP I/O
Default eBGP mode: advertise - accept, receive - accept
Groups: 2 Peers: 5 Down peers: 1
Auto-discovered peers: 4
Table          Tot Paths  Act Paths Suppressed    History Damp State    Pending
inet.0
                      24         20          0          0          0          0
inet6.0
                      16         16          0          0          0          0
Peer                     AS      InPkt     OutPkt    OutQ   Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped...
fe80::5668:a3ff:fe16:1049%ge-0/0/3.0       64499        194        195       0       1     1:25:18 Establ
  inet.0: 5/6/6/0
  inet6.0: 4/4/4/0
fe80::5668:a3ff:fe16:104c%ge-0/0/4.0       64499        193        195       0       1     1:25:18 Establ
  inet.0: 5/6/6/0
  inet6.0: 4/4/4/0
fe80::5668:a3ff:fe16:12c9%ge-0/0/1.0       64498        217        223       0       1     1:35:53 Establ
  inet.0: 5/6/6/0
  inet6.0: 4/4/4/0
fe80::5668:a3ff:fe16:12ce%ge-0/0/2.0       64498        218        223       0       1     1:35:57 Establ
  inet.0: 5/6/6/0
  inet6.0: 4/4/4/0

스파인1

content_copy zoom_out_map
user@Spine1> show bgp summary auto-discovered
Threading mode: BGP I/O
Default eBGP mode: advertise - accept, receive - accept
Groups: 1 Peers: 4 Down peers: 0
Auto-discovered peers: 4
Table          Tot Paths  Act Paths Suppressed    History Damp State    Pending
inet.0
                      24         20          0          0          0          0
inet6.0
                      16         16          0          0          0          0
Peer                     AS      InPkt     OutPkt    OutQ   Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped...
fe80::5668:a3ff:fe16:2e7%ge-0/0/0.0       64496        245        237       0       0     1:45:19 Establ
  inet.0: 5/6/6/0
  inet6.0: 4/4/4/0
fe80::5668:a3ff:fe16:2f2%ge-0/0/1.0       64496        245        238       0       0     1:45:23 Establ
  inet.0: 5/6/6/0
  inet6.0: 4/4/4/0
fe80::5668:a3ff:fe16:e49%ge-0/0/2.0       64497        245        243       0       0     1:45:19 Establ
  inet.0: 5/6/6/0
  inet6.0: 4/4/4/0
fe80::5668:a3ff:fe16:e59%ge-0/0/3.0       64497        247        248       0       0     1:45:23 Establ
  inet.0: 5/6/6/0
  inet6.0: 4/4/4/0
의미

출력에는 자동 검색된 bgp 인접 항목의 요약이 표시됩니다. 자동 검색된 피어의 수와 세부 정보를 볼 수 있습니다.

BGP 자동 검색 피어 확인

목적

자동 검색된 BGP 인접 라우터를 확인합니다.

작업

운영 모드에서 show bgp neighbor auto-discovered 명령을 실행합니다.

리프1

content_copy zoom_out_map
user@Leaf1> show bgp neighbor auto-discovered
Peer: fe80::5668:a3ff:fe16:1049%ge-0/0/3.0+65265 AS 64499 Local: fe80::5668:a3ff:fe16:2f6%ge-0/0/3.0+179 AS 64496
  Group: autodisc              Routing-Instance: master
  Forwarding routing-instance: master
  Type: External    State: Established    Flags: <Sync PeerAsList AutoDiscoveredNdp>
  Last State: OpenConfirm   Last Event: RecvKeepAlive
  Last Error: None
  Export: [ DIRECT-RTS ]
  Options: <AddressFamily Multipath Refresh>
  Options: <MultipathAs>
  Options: <GracefulShutdownRcv>
  Address families configured: inet-unicast inet6-unicast
  Holdtime: 90 Preference: 170
  Graceful Shutdown Receiver local-preference: 0
  Number of flaps: 1
  Last flap event: RecvNotify
  Error: 'Cease' Sent: 0 Recv: 1
  Peer ID: 128.49.102.24   Local ID: 128.49.102.139    Active Holdtime: 90
  Keepalive Interval: 30         Group index: 2    Peer index: 2    SNMP index: 9
  I/O Session Thread: bgpio-0 State: Enabled
  BFD: disabled, down
  Local Interface: ge-0/0/3.0
  NLRI for restart configured on peer: inet-unicast inet6-unicast
  NLRI advertised by peer: inet-unicast inet6-unicast
  NLRI for this session: inet-unicast inet6-unicast
  Peer supports Refresh capability (2)
  Stale routes from peer are kept for: 300
  Peer does not support Restarter functionality
  Restart flag received from the peer: Notification
  NLRI that restart is negotiated for: inet-unicast inet6-unicast
  NLRI of received end-of-rib markers: inet-unicast inet6-unicast
  NLRI of all end-of-rib markers sent: inet-unicast inet6-unicast
  ....................

스파인1

content_copy zoom_out_map
user@Spine1>  show bgp neighbor auto-discovered
Peer: fe80::5668:a3ff:fe16:2e7%ge-0/0/0.0+60458 AS 64496 Local: fe80::5668:a3ff:fe16:12c9%ge-0/0/0.0+179 AS 64498
  Group: autodisc              Routing-Instance: master
  Forwarding routing-instance: master
  Type: External    State: Established    Flags: <Sync PeerAsList AutoDiscoveredNdp>
  Last State: OpenConfirm   Last Event: RecvKeepAlive
  Last Error: None
  Export: [ DIRECT-RTS ]
  Options: <AddressFamily Multipath Refresh>
  Options: <MultipathAs>
  Options: <GracefulShutdownRcv>
  Address families configured: inet-unicast inet6-unicast
  Holdtime: 90 Preference: 170
  Graceful Shutdown Receiver local-preference: 0
  Number of flaps: 0
  Peer ID: 128.49.102.139  Local ID: 128.49.103.129    Active Holdtime: 90
  Keepalive Interval: 30         Group index: 1    Peer index: 3    SNMP index: 7
  I/O Session Thread: bgpio-0 State: Enabled
  BFD: disabled, down
  Local Interface: ge-0/0/0.0
  NLRI for restart configured on peer: inet-unicast inet6-unicast
  NLRI advertised by peer: inet-unicast inet6-unicast
  NLRI for this session: inet-unicast inet6-unicast
  Peer supports Refresh capability (2)
  Stale routes from peer are kept for: 300
  Peer does not support Restarter functionality
  Restart flag received from the peer: Notification
  NLRI that restart is negotiated for: inet-unicast inet6-unicast
  NLRI of received end-of-rib markers: inet-unicast inet6-unicast
  NLRI of all end-of-rib markers sent: inet-unicast inet6-unicast
  Peer does not support LLGR Restarter functionality
  Peer supports 4 byte AS extension (peer-as 64496)
  Peer does not support Addpath
  NLRI that we support extended nexthop encoding for: inet-unicast
  NLRI that peer supports extended nexthop encoding for: inet-unicast
  Table inet.0 Bit: 20000
  ....................
의미

출력에는 자동 검색된 BGP 인접 라우터에 대한 정보가 표시됩니다.

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