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7. 対向につながらにな。。 #2

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kitakou0313 opened this issue Aug 28, 2021 · 7 comments
Open

7. 対向につながらにな。。 #2

kitakou0313 opened this issue Aug 28, 2021 · 7 comments
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@passerby-1
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150pt ネットワーク問題

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@kitakou0313
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https://contest.ictsc.net/#/problems/ffa9e296-80c6-4949-babe-10820183c71f
@passerby-1 passerby-1 self-assigned this Aug 28, 2021
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passerby-1 commented Aug 28, 2021 •
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user@tky-R1:~$ show config

interfaces {
    ethernet eth0 {
        address 172.16.1.3/31
        hw-id 9c:a3:ba:32:60:d7
    }
    ethernet eth1 {
        address 172.30.253.2/31
        hw-id 9c:a3:ba:32:fa:24
    }
    ethernet eth2 {
        address 192.168.20.1/24
        hw-id 9c:a3:ba:32:4c:69
    }
    loopback lo {
        address 172.30.254.1/32
        address 172.30.0.1/24
    }
}
protocols {
    bgp 65001 {
        address-family {
            ipv4-unicast {
                network 172.30.0.0/16 {
                }
            }
        }
        neighbor 172.16.1.2 {
            address-family {
                ipv4-unicast {
                    soft-reconfiguration {
                        inbound
                    }
                }
            }
            remote-as 65000
        }
        neighbor 172.30.253.3 {
            address-family {
                ipv4-unicast {
                    soft-reconfiguration {
                        inbound
                    }
                }
            }
            remote-as internal
        }
        parameters {
            router-id 172.30.254.1
        }
    }
    ospf {
        area 0 {
            network 172.30.254.1/32
            network 172.30.253.2/31
            network 172.30.0.0/24
        }
        parameters {
            abr-type cisco
            router-id 172.30.254.1
        }
    }
}
service {
    ssh {
    }
}
system {
    config-management {
        commit-revisions 20
    }
    console {
        device ttyS0 {
            speed 9600
        }
    }
    host-name tky-R1
    login {
        user user {
            authentication {
                encrypted-password ****************
            }
        }
        user vyos {
            authentication {
                encrypted-password ****************
            }
        }
    }
    name-server 133.242.0.3
    name-server 133.242.0.4
    ntp {
        server ntp1.sakura.ad.jp {
        }
    }
    syslog {
        global {
            facility all {
                level notice
            }
            facility protocols {
                level debug
            }
        }
    }
    time-zone Asia/Tokyo
}

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user@tky-R1:~$ show configuration commands

set interfaces ethernet eth0 address '172.16.1.3/31'
set interfaces ethernet eth0 hw-id '9c:a3:ba:32:60:d7'
set interfaces ethernet eth1 address '172.30.253.2/31'
set interfaces ethernet eth1 hw-id '9c:a3:ba:32:fa:24'
set interfaces ethernet eth2 address '192.168.20.1/24'
set interfaces ethernet eth2 hw-id '9c:a3:ba:32:4c:69'
set interfaces loopback lo address '172.30.254.1/32'
set interfaces loopback lo address '172.30.0.1/24'
set protocols bgp 65001 address-family ipv4-unicast network 172.30.0.0/16
set protocols bgp 65001 neighbor 172.16.1.2 address-family ipv4-unicast soft-reconfiguration inbound
set protocols bgp 65001 neighbor 172.16.1.2 remote-as '65000'
set protocols bgp 65001 neighbor 172.30.253.3 address-family ipv4-unicast soft-reconfiguration inbound
set protocols bgp 65001 neighbor 172.30.253.3 remote-as 'internal'
set protocols bgp 65001 parameters router-id '172.30.254.1'
set protocols ospf area 0 network '172.30.254.1/32'
set protocols ospf area 0 network '172.30.253.2/31'
set protocols ospf area 0 network '172.30.0.0/24'
set protocols ospf parameters abr-type 'cisco'
set protocols ospf parameters router-id '172.30.254.1'
set service ssh
set system config-management commit-revisions '20'
set system console device ttyS0 speed '9600'
set system host-name 'tky-R1'
set system login user user authentication encrypted-password '$6$qgSU9Gih4L9GtHY8$c3msGDhaWUgMWNZImToUs824aP45Qyvq0zRi74Q7HqHKb1nu4v1i4IwY/4XuZTwbWFMxMWx/2nsMQsdK5dw.4/'
set system login user vyos authentication encrypted-password '$6$u/FGcXt1$NBy6GWQOf.BnXEqD3wRt1vFGv3FVn7Yq6VvCG56JHrSfXJTCUga5wRrM623VzOpaXM8oMMEPMrHCTosyF/lMx1'
set system name-server '133.242.0.3'
set system name-server '133.242.0.4'
set system ntp server ntp1.sakura.ad.jp
set system syslog global facility all level 'notice'
set system syslog global facility protocols level 'debug'
set system time-zone 'Asia/Tokyo'

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user@tky-R1:~$ show ip bgp

BGP table version is 3, local router ID is 172.30.254.1, vrf id 0
Default local pref 100, local AS 65001
Status codes:  s suppressed, d damped, h history, * valid, > best, = multipath,
               i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes:  i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 172.16.1.2/31    172.16.1.2               0             0 65000 i
*> 172.20.0.0/16    172.16.1.2               0             0 65000 i
* i172.30.0.0/16    172.30.253.3             0    100      0 i
*>                  0.0.0.0                  0         32768 i

Displayed  3 routes and 4 total paths

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user@tky-R1:~$ show ip bgp sum

IPv4 Unicast Summary:
BGP router identifier 172.30.254.1, local AS number 65001 vrf-id 0
BGP table version 3
RIB entries 5, using 920 bytes of memory
Peers 2, using 41 KiB of memory

Neighbor        V         AS MsgRcvd MsgSent   TblVer  InQ OutQ  Up/Down State/PfxRcd
172.16.1.2      4      65000     132     132        0    0    0 02:07:34            2
172.30.253.3    4      65001     131     132        0    0    0 02:07:33            1

Total number of neighbors 2

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user@tky-R2:~$ show configuration commands

set interfaces ethernet eth0 address '172.30.253.3/31'
set interfaces ethernet eth0 hw-id '9c:a3:ba:32:d6:ec'
set interfaces ethernet eth1 address '172.30.1.1/24'
set interfaces ethernet eth1 hw-id '9c:a3:ba:32:b7:b1'
set interfaces ethernet eth2 address '192.168.20.2/24'
set interfaces ethernet eth2 hw-id '9c:a3:ba:32:56:90'
set interfaces loopback lo address '172.30.254.2/32'
set protocols bgp 65001 address-family ipv4-unicast network 172.30.0.0/16
set protocols bgp 65001 neighbor 172.30.253.2 address-family ipv4-unicast soft-reconfiguration inbound
set protocols bgp 65001 neighbor 172.30.253.2 remote-as 'internal'
set protocols bgp 65001 parameters router-id '172.30.254.2'
set protocols ospf area 0 network '172.30.1.0/24'
set protocols ospf area 0 network '172.30.253.2/31'
set protocols ospf area 0 network '172.30.254.2/32'
set protocols ospf parameters abr-type 'cisco'
set protocols ospf parameters router-id '172.30.254.2'
set service ssh
set system config-management commit-revisions '20'
set system console device ttyS0 speed '9600'
set system host-name 'tky-R2'
set system login user user authentication encrypted-password '$6$4.V3u2EnVf8QJuR/$LkbnsMWkX7P.kaY67KYg5bYrK.WRaxiayxo3WWSrFuNKQWiUYsK7KHTb80DK4Zx3PkeGaOfBP1YXQiG.fLOub1'
set system login user vyos authentication encrypted-password '$6$rUqQwCud$c.WEe3eI/Wb/Sya.erhbbrPZ7Cw5lT1lJ4YjC2FnbMPQOE4z6PjC.I9BPpcvZDpAgYaOyyCDFzYiBaae0XpjY/'
set system name-server '133.242.0.3'
set system name-server '133.242.0.4'
set system ntp server ntp1.sakura.ad.jp
set system syslog global facility all level 'notice'
set system syslog global facility protocols level 'debug'
set system time-zone 'Asia/Tokyo'

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user@tky-R2:~$ show ip bgp

BGP table version is 1, local router ID is 172.30.254.2, vrf id 0
Default local pref 100, local AS 65001
Status codes:  s suppressed, d damped, h history, * valid, > best, = multipath,
               i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes:  i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
  i172.16.1.2/31    172.16.1.2               0    100      0 65000 i
  i172.20.0.0/16    172.16.1.2               0    100      0 65000 i
* i172.30.0.0/16    172.30.253.2             0    100      0 i
*>                  0.0.0.0                  0         32768 i

Displayed  3 routes and 4 total paths

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user@tky-R2:~$ show ip bgp sum

IPv4 Unicast Summary:
BGP router identifier 172.30.254.2, local AS number 65001 vrf-id 0
BGP table version 1
RIB entries 5, using 920 bytes of memory
Peers 1, using 20 KiB of memory

Neighbor        V         AS MsgRcvd MsgSent   TblVer  InQ OutQ  Up/Down State/PfxRcd
172.30.253.2    4      65001     137     136        0    0    0 02:12:45            3

Total number of neighbors 1

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