7
2

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?

More than 1 year has passed since last update.

Oracle Cloud: VRRP+BGPでIPSec VPN Routerを冗長構成してみてみた

Last updated at Posted at 2019-06-30

#■構成
NW構成.png

#■目的
Oracle Cloud Infrastructure(OCI)からCPEへの同一CIDRへのパスが複数ある場合、非対称ルーティングとなり、往路と復路でパケットが同一CIDRの複数ある別インターフェース、別CPEを通る動作になります
そのため、CPEを2台使用した冗長構成ではOCIからルータへのパケットは全パスが使用されるのでWAN側をActive-Active構成にします。
CPEのWAN側Active-Active構成での注意点は、LAN側インターフェースに障害が発生した場合、そのCPEのWAN側のインターフェースからパケットが来ないようDownさせるようなルート制御が必要です。
Static Routing(静的ルーティング)の場合は、VRRPのLAN側インターフェース障害発生したら、watch-groupでWAN側IPSec TunnelをDownさせ、VRRPがフェールした生存ルーターのみでパケットが通るようにします
BGP(動的ルーティング)の場合は、LAN側インターフェース障害も検知してLAN側ルート情報がなくなったことを隣接ルーター(neighbors)に伝搬してくれます。
ということで、実装が簡単そうなBGPとVRRPで冗長構成を行い動作検証してみます。
※UNIVERGE IX ルーターのwatch-groupは、CISCOのObject Tracking機能に相当します。

#■構築設定
NEC IXのIPSec VPNとBGPの設定は以前の記事を参考に構成します。
ここではVRRPとBGPの設定を行います。

●参考
UNIVERGE IXルーターとOracle CloudをIPSec接続してAS-Path Prependで経路制御してみてみた
Oracle Cloud:NEC UNIVERGE IXルーターでOCIへIPsec VPN接続してみてみた

##●VRRP設定
VRRPはLAN側デフォルトゲートウェイのパスを冗長化するためのVIPで、2台のRouterを使用してActive-Standby構成にします。このVIPをLAN側のクライアントはGatwey IPに設定します。
ここではRouter01をActive(Master)、Router02をStandby(Backup)にするため、Router01のプライオリティを高くして設定します

・Router01設定

vrrp enable
interface GigaEthernet1.0
  vrrp 254 ip 192.168.0.254
  vrrp 254 priority 100
  vrrp 254 ip virtual-host

・Router02設定

vrrp enable
interface GigaEthernet1.0
  vrrp 254 ip 192.168.0.254
  vrrp 254 priority 95
  vrrp 254 ip virtual-host

##●VRRP設定確認
・Router01設定確認

Router01(config)# show vrrp
    Interface            VRID Pri Pre State      Master addr
    GigaEthernet1.0       254 100 P   master     192.168.0.211

・Router02設定確認

Router01(config)# show vrrp
    Interface            VRID Pri Pre State      Master addr
    GigaEthernet1.0       254  95 P   backup     192.168.0.211

##●VRRP動作確認
Router02のプライオリティを高くすることで、Router02がMasterとなりVRRPが遷移し、Router01がBackupになることを確認

・Router02設定と設定確認

Router02(config)# interface GigaEthernet1.0
Router(config-GigaEthernet1.0)# vrrp 254 priority 205

Router02(config)# show vrrp
    Interface            VRID Pri Pre State      Master addr
    GigaEthernet1.0       254 205 P   master     192.168.0.212

・Router01状態確認

Router01(config)# show vrrp
    Interface            VRID Pri Pre State      Master addr
    GigaEthernet1.0       254 105 P   backup     192.168.0.212

##●BGPの設定
・Router01

router bgp 65000
  neighbor 192.168.100.202 remote-as 31898
  neighbor 192.168.100.202 timers 10 30
  neighbor 192.168.100.206 remote-as 31898
  neighbor 192.168.100.206 timers 10 30
  address-family ipv4 unicast
    network 192.168.100.0/24
    network 192.168.0.0/24

・Router02

router bgp 65000
  neighbor 192.168.100.210 remote-as 31898
  neighbor 192.168.100.210 timers 10 30
  neighbor 192.168.100.214 remote-as 31898
  neighbor 192.168.100.214 timers 10 30
  address-family ipv4 unicast
    network 192.168.100.0/24
    network 192.168.0.0/24

##●BGP設定確認

・Router01

Router01(config)# show ip bgp summary
    BGP router ID 192.168.0.211, local AS number 65000
    2 BGP AS-PATH entries

    Neighbor         V    AS    MsgRcvd MsgSent Up/DownTime   State
    192.168.100.202 4    31898 3820    3484    9:24:36       ESTABLISHED
    192.168.100.206 4    31898 3813    3483    9:24:36       ESTABLISHED

    Total number of neighbors 2

Router01(config)# show ip bgp
    BGP table version is 251, local router ID is 192.168.0.211
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path
    *  10.0.0.0/24        192.168.100.206                        31898 i
    *>                    192.168.100.202                        31898 i
    192.168.100.0/24   0.0.0.0                  0             i
    *> 192.168.0.0/24   0.0.0.0                  1             i

    Total number of prefixes 6

Router01(config)# show ip bgp neighbors 192.168.100.202 advertised-routes
    BGP table version is 195, local router ID is 192.168.0.211
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path
    *> 192.168.0.0/24   192.168.100.201          1             i

    Total number of prefixes 1

Router01(config)# show ip bgp neighbors 192.168.100.202 received-routes
    BGP table version is 195, local router ID is 192.168.0.211
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path
    *> 10.0.0.0/24        192.168.100.202                        31898 i

    Total number of prefixes 1

Router01(config)# show ip bgp neighbors 192.168.100.206 advertised-routes
    BGP table version is 195, local router ID is 192.168.0.211
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path
    *> 192.168.0.0/24   192.168.100.205          1             i

    Total number of prefixes 1

Router01(config)# show ip route
    IP Routing Table - 9 entries, 3 hidden, 2036 frees
    Entries: 5 Connected, 1 Static, 0 RIP, 0 OSPF, 3 BGP
    Codes: C - Connected, S - Static, R - RIP, O - OSPF, IA - OSPF inter area
        N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
        E1 - OSPF external type 1, E2 - OSPF external type 2, B - BGP
        * - Candidate default, s - Summary
    Timers: Age
    S*   0.0.0.0/0 [1/1] is directly connected, GigaEthernet0.1, 3:44:56
        10.0.0.0/8 is subnetted, 3 subnets
    B      10.0.0.0/24 [20/0] via 192.168.100.202, Tunnel0.0, 2:45:23
        192.168.0.0/16 is subnetted, 2 subnets
    C      192.168.100.200/30 [0/1] is directly connected, Tunnel0.0, 3:00:26
    C      192.168.100.204/30 [0/1] is directly connected, Tunnel1.0, 3:00:26
        192.168.0.0/24 is subnetted, 2 subnets
    C      192.168.0.0/24 [0/1] is directly connected, GigaEthernet1.0, 2:46:52
    C      192.168.0.254/32 [0/1] is directly connected, Virtual254, 2:46:48

・Router02

Router02(config)# show ip bgp summary
    BGP router ID 192.168.0.212, local AS number 65000
    4 BGP AS-PATH entries

    Neighbor         V    AS    MsgRcvd MsgSent Up/DownTime   State
    192.168.100.210 4    31898 4482    4084    9:19:47       ESTABLISHED
    192.168.100.214 4    31898 4477    4086    9:19:46       ESTABLISHED

    Total number of neighbors 2


Router02(config)# show ip bgp
    BGP table version is 169, local router ID is 192.168.0.212
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path
    *> 10.0.0.0/24        192.168.100.214                        31898 i
    *                     192.168.100.210                        31898 i
    192.168.100.0/24   0.0.0.0                  0             i
    *> 192.168.0.0/24   0.0.0.0                  1             i

    Total number of prefixes 6


Router02(config-bgp)# show ip bgp neighbors 192.168.100.210 advertised-routes
    BGP table version is 169, local router ID is 192.168.0.212
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path
    *> 192.168.0.0/24   192.168.100.209          1             i

    Total number of prefixes 1

Router02(config-bgp)# show ip bgp neighbors 192.168.100.210 received-routes
    BGP table version is 169, local router ID is 192.168.0.212
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path
    *  10.0.0.0/24        192.168.100.210                        31898 i

    Total number of prefixes 1

Router02(config-bgp)# show ip bgp neighbors 192.168.100.214 advertised-routes
    BGP table version is 169, local router ID is 192.168.0.212
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path
    *> 192.168.0.0/24   192.168.100.213          1             i

    Total number of prefixes 1

Router02(config-bgp)# show ip bgp neighbors 192.168.100.214 received-routes
    BGP table version is 169, local router ID is 192.168.0.212
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path
    *> 10.0.0.0/24        192.168.100.214                        31898 i

    Total number of prefixes 1


Router02(config-bgp)# show ip route
    IP Routing Table - 8 entries, 3 hidden, 2037 frees
    Entries: 4 Connected, 1 Static, 0 RIP, 0 OSPF, 3 BGP
    Codes: C - Connected, S - Static, R - RIP, O - OSPF, IA - OSPF inter area
        N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
        E1 - OSPF external type 1, E2 - OSPF external type 2, B - BGP
        * - Candidate default, s - Summary
    Timers: Age
    S*   0.0.0.0/0 [1/1] is directly connected, GigaEthernet0.1, 3:42:27
        10.0.0.0/8 is subnetted, 3 subnets
    B      10.0.0.0/24 [20/0] via 192.168.100.214, Tunnel1.0, 0:12:21
        192.168.0.0/16 is subnetted, 2 subnets
    C      192.168.100.208/30 [0/1] is directly connected, Tunnel0.0, 2:57:44
    C      192.168.100.212/30 [0/1] is directly connected, Tunnel1.0, 2:57:44
        192.168.0.0/24 is subnetted, 1 subnets
    C      192.168.0.0/24 [0/1] is directly connected, GigaEthernet1.0, 3:42:33
        219.98.239.0/24 is subnetted, 1 subnets
    C      219.98.239.247/32 [0/1] is directly connected, GigaEthernet0.1, 3:42:27

##●OCI IPSec 設定確認
・Router01
IPSec01.png

・Router02
IPSec02.png

#■Router01:LAN抜線障害検証
Router01のLANを抜線するので、Router01のコマンド確認はコンソールケーブル接続してコマンド確認します

##●Router01 LAN抜線
IMG_5869.JPG

##●ping疎通確認
通信断がないことを確認

・OCI -> OnP ping疎通確認

[opc@oci-inst01 ~]$ ping 192.168.100.250
    PING 192.168.100.250 (192.168.100.250) 56(84) bytes of data.
    64 bytes from 192.168.100.250: icmp_seq=1 ttl=62 time=9.12 ms
    64 bytes from 192.168.100.250: icmp_seq=2 ttl=62 time=15.3 ms
    64 bytes from 192.168.100.250: icmp_seq=3 ttl=62 time=16.8 ms
    64 bytes from 192.168.100.250: icmp_seq=4 ttl=62 time=43.2 ms
    64 bytes from 192.168.100.250: icmp_seq=5 ttl=62 time=8.85 ms
    64 bytes from 192.168.100.250: icmp_seq=6 ttl=62 time=12.1 ms
    64 bytes from 192.168.100.250: icmp_seq=7 ttl=62 time=39.9 ms
    64 bytes from 192.168.100.250: icmp_seq=8 ttl=62 time=128 ms
    64 bytes from 192.168.100.250: icmp_seq=9 ttl=62 time=87.2 ms
    64 bytes from 192.168.100.250: icmp_seq=10 ttl=62 time=85.0 ms
    64 bytes from 192.168.100.250: icmp_seq=11 ttl=62 time=22.5 ms
    64 bytes from 192.168.100.250: icmp_seq=12 ttl=62 time=73.9 ms
    64 bytes from 192.168.100.250: icmp_seq=13 ttl=62 time=42.0 ms
    64 bytes from 192.168.100.250: icmp_seq=14 ttl=62 time=68.0 ms
    64 bytes from 192.168.100.250: icmp_seq=15 ttl=62 time=31.5 ms

    64 bytes from 192.168.100.250: icmp_seq=21 ttl=62 time=22.7 ms
    64 bytes from 192.168.100.250: icmp_seq=22 ttl=62 time=13.3 ms
    64 bytes from 192.168.100.250: icmp_seq=23 ttl=62 time=51.2 ms
    ・・・

==> 抜線後5秒間フリーズするが通信断はなかった

・OnP -> OCI ping疎通確認

[user@onp-inst01 ~]$ ping 10.0.0.2
    PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data.
    64 bytes from 10.0.0.2: icmp_seq=1 ttl=62 time=95.3 ms
    64 bytes from 10.0.0.2: icmp_seq=2 ttl=62 time=4.27 ms
    64 bytes from 10.0.0.2: icmp_seq=3 ttl=62 time=4.45 ms
    64 bytes from 10.0.0.2: icmp_seq=4 ttl=62 time=108 ms
    64 bytes from 10.0.0.2: icmp_seq=5 ttl=62 time=88.5 ms
    64 bytes from 10.0.0.2: icmp_seq=6 ttl=62 time=88.8 ms
    64 bytes from 10.0.0.2: icmp_seq=7 ttl=62 time=77.2 ms
    64 bytes from 10.0.0.2: icmp_seq=8 ttl=62 time=40.4 ms
    64 bytes from 10.0.0.2: icmp_seq=9 ttl=62 time=48.0 ms
    64 bytes from 10.0.0.2: icmp_seq=10 ttl=62 time=43.1 ms
    64 bytes from 10.0.0.2: icmp_seq=11 ttl=62 time=27.8 ms

    64 bytes from 10.0.0.2: icmp_seq=16 ttl=62 time=7.34 ms
    64 bytes from 10.0.0.2: icmp_seq=17 ttl=62 time=7.45 ms
    64 bytes from 10.0.0.2: icmp_seq=18 ttl=62 time=43.0 ms
    64 bytes from 10.0.0.2: icmp_seq=19 ttl=62 time=76.4 ms
    64 bytes from 10.0.0.2: icmp_seq=20 ttl=62 time=11.5 ms
    64 bytes from 10.0.0.2: icmp_seq=21 ttl=62 time=5.87 ms
    ・・・

==> 抜線後5秒間フリーズするが通信断はなかった

##●VRRP確認
Router01からRouter02へVRRPがフェールオーバーしたことを確認

・Router01

Router01(config)# show vrrp
    Interface            VRID Pri Pre State      Master addr
    GigaEthernet1.0       254 105 P   initialize 0.0.0.0

・Router02

Router02(config)# show vrrp
    Interface            VRID Pri Pre State      Master addr
    GigaEthernet1.0       254  95 P   master     192.168.0.212

##●Route確認
Router01のOCIルート10.0.0.0/24とLAN側ルート192.168.0.0/24がなくなっていることを確認

・Router01

Router01(config)# show ip route
    IP Routing Table - 4 entries, 2 hidden, 2042 frees
    Entries: 3 Connected, 1 Static, 0 RIP, 0 OSPF, 0 BGP
    Codes: C - Connected, S - Static, R - RIP, O - OSPF, IA - OSPF inter area
        N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
        E1 - OSPF external type 1, E2 - OSPF external type 2, B - BGP
        * - Candidate default, s - Summary
    Timers: Age
    S*   0.0.0.0/0 [1/1] is directly connected, GigaEthernet0.1, 4:29:26
        192.168.0.0/16 is subnetted, 2 subnets
    C      192.168.100.200/30 [0/1] is directly connected, Tunnel0.0, 3:44:57
    C      192.168.100.204/30 [0/1] is directly connected, Tunnel1.0, 3:44:57

・ノRouter02

Router02(config)# show ip route
    IP Routing Table - 9 entries, 3 hidden, 2036 frees
    Entries: 5 Connected, 1 Static, 0 RIP, 0 OSPF, 3 BGP
    Codes: C - Connected, S - Static, R - RIP, O - OSPF, IA - OSPF inter area
        N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
        E1 - OSPF external type 1, E2 - OSPF external type 2, B - BGP
        * - Candidate default, s - Summary
    Timers: Age
    S*   0.0.0.0/0 [1/1] is directly connected, GigaEthernet0.1, 4:39:46
        10.0.0.0/8 is subnetted, 3 subnets
    B      10.0.0.0/24 [20/0] via 192.168.100.214, Tunnel1.0, 1:09:40
        192.168.0.0/16 is subnetted, 2 subnets
    C      192.168.100.208/30 [0/1] is directly connected, Tunnel0.0, 3:55:03
    C      192.168.100.212/30 [0/1] is directly connected, Tunnel1.0, 3:55:03
        192.168.0.0/24 is subnetted, 2 subnets
    C      192.168.0.0/24 [0/1] is directly connected, GigaEthernet1.0, 4:39:52
    C      192.168.0.254/32 [0/1] is directly connected, Virtual254, 0:13:38
        219.98.239.0/24 is subnetted, 1 subnets
    C      219.98.239.247/32 [0/1] is directly connected, GigaEthernet0.1, 4:39:46

##●BGP Route確認
Router01のOCIルート10.0.0.0/24がなくなっていることを確認

・Router01

Router01(config)# show ip bgp
    BGP table version is 258, local router ID is 192.168.0.211
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path
    192.168.100.0/24   0.0.0.0                  0             i
    192.168.0.0/24   0.0.0.0                  0             i

    Total number of prefixes 2

・Router02

Router02(config)# show ip bgp
    BGP table version is 169, local router ID is 192.168.0.212
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path
    *> 10.0.0.0/24        192.168.100.214                        31898 i
    *                     192.168.100.210                        31898 i
    192.168.100.0/24   0.0.0.0                  0             i
    *> 192.168.0.0/24   0.0.0.0                  1             i

    Total number of prefixes 6

##●隣接ルーターに広告しているLAN側経路192.168.0.0/24は無いことを確認

Router01(config)# show ip  bgp neighbors 169.254.200.202 advertised-routes
    BGP table version is 205, local router ID is 192.168.100.211
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path

    Total number of prefixes 0

Router01(config)# show ip  bgp neighbors 169.254.200.206 advertised-routes
    BGP table version is 205, local router ID is 192.168.100.211
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path

    Total number of prefixes 0

#■Router01:LAN接続によるフェール・バック確認

##●Router01 LAN抜線切り戻し接続
IMG_5886.JPG

##●ping疎通確認
通信断がないことを確認

・OCI -> OnP ping疎通確認

[opc@oci-inst01 ~]$ ping 192.168.100.250
    ・・・
    64 bytes from 192.168.100.250: icmp_seq=965 ttl=62 time=13.2 ms
    64 bytes from 192.168.100.250: icmp_seq=966 ttl=62 time=11.4 ms
    64 bytes from 192.168.100.250: icmp_seq=967 ttl=62 time=106 ms
    64 bytes from 192.168.100.250: icmp_seq=968 ttl=62 time=20.8 ms
    64 bytes from 192.168.100.250: icmp_seq=969 ttl=62 time=4.27 ms

    64 bytes from 192.168.100.250: icmp_seq=991 ttl=62 time=13.2 ms
    64 bytes from 192.168.100.250: icmp_seq=992 ttl=62 time=11.4 ms
    64 bytes from 192.168.100.250: icmp_seq=993 ttl=62 time=106 ms
    64 bytes from 192.168.100.250: icmp_seq=994 ttl=62 time=20.8 ms
    64 bytes from 192.168.100.250: icmp_seq=995 ttl=62 time=4.27 ms

==> 抜線後22秒間フリーズするが通信断はなかった

・OnP -> OCI ping疎通確認

[user@onp-inst01 ~]$ ping 10.0.0.2
    ・・・
    64 bytes from 10.0.0.2: icmp_seq=960 ttl=62 time=16.7 ms
    64 bytes from 10.0.0.2: icmp_seq=961 ttl=62 time=13.8 ms
    64 bytes from 10.0.0.2: icmp_seq=962 ttl=62 time=31.1 ms
    64 bytes from 10.0.0.2: icmp_seq=963 ttl=62 time=4.66 ms
    64 bytes from 10.0.0.2: icmp_seq=964 ttl=62 time=4.95 ms

    64 bytes from 10.0.0.2: icmp_seq=987 ttl=62 time=16.7 ms
    64 bytes from 10.0.0.2: icmp_seq=989 ttl=62 time=13.8 ms
    64 bytes from 10.0.0.2: icmp_seq=990 ttl=62 time=31.1 ms
    64 bytes from 10.0.0.2: icmp_seq=991 ttl=62 time=4.66 ms
    64 bytes from 10.0.0.2: icmp_seq=992 ttl=62 time=4.95 ms

==> 抜線後23秒間フリーズするが通信断はなかった

##●VRRP確認
Router02からRouter01へVRRPがフェールバックしたことを確認

・Router01

Router01(config)# show vrrp
    Interface            VRID Pri Pre State      Master addr
    GigaEthernet1.0       254 105 P   master     192.168.0.211

・Router02

Router02(config)# show vrrp
    Interface            VRID Pri Pre State      Master addr
    GigaEthernet1.0       254  95 P   backup     192.168.0.211

##●Route確認
Router01のOCIルート10.0.0.0/24とLAN側ルート192.168.0.0/24が追加されていることを確認

・Router01

Router01(config)# show ip route
    IP Routing Table - 9 entries, 3 hidden, 2036 frees
    Entries: 5 Connected, 1 Static, 0 RIP, 0 OSPF, 3 BGP
    Codes: C - Connected, S - Static, R - RIP, O - OSPF, IA - OSPF inter area
        N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
        E1 - OSPF external type 1, E2 - OSPF external type 2, B - BGP
        * - Candidate default, s - Summary
    Timers: Age
    S*   0.0.0.0/0 [1/1] is directly connected, GigaEthernet0.1, 4:50:44
        10.0.0.0/8 is subnetted, 3 subnets
    B      10.0.0.0/24 [20/0] via 192.168.100.202, Tunnel0.0, 0:05:54
        192.168.0.0/16 is subnetted, 2 subnets
    C      192.168.100.200/30 [0/1] is directly connected, Tunnel0.0, 4:06:15
    C      192.168.100.204/30 [0/1] is directly connected, Tunnel1.0, 4:06:15
        192.168.0.0/24 is subnetted, 2 subnets
    C      192.168.0.0/24 [0/1] is directly connected, GigaEthernet1.0, 0:07:49
    C      192.168.0.254/32 [0/1] is directly connected, Virtual254, 0:07:45

・Router02

Router02(config)# show ip route
    IP Routing Table - 8 entries, 3 hidden, 2037 frees
    Entries: 4 Connected, 1 Static, 0 RIP, 0 OSPF, 3 BGP
    Codes: C - Connected, S - Static, R - RIP, O - OSPF, IA - OSPF inter area
        N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
        E1 - OSPF external type 1, E2 - OSPF external type 2, B - BGP
        * - Candidate default, s - Summary
    Timers: Age
    S*   0.0.0.0/0 [1/1] is directly connected, GigaEthernet0.1, 5:00:38
        10.0.0.0/8 is subnetted, 3 subnets
    B      10.0.0.0/24 [20/0] via 192.168.100.214, Tunnel1.0, 1:30:31
        192.168.0.0/16 is subnetted, 2 subnets
    C      192.168.100.208/30 [0/1] is directly connected, Tunnel0.0, 4:15:54
    C      192.168.100.212/30 [0/1] is directly connected, Tunnel1.0, 4:15:54
        192.168.0.0/24 is subnetted, 1 subnets
    C      192.168.0.0/24 [0/1] is directly connected, GigaEthernet1.0, 5:00:43
        219.98.239.0/24 is subnetted, 1 subnets
    C      219.98.239.247/32 [0/1] is directly connected, GigaEthernet0.1, 5:00:38

##●BGP Route確認

Router01(config)# show ip bgp
    BGP table version is 262, local router ID is 192.168.0.211
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path
    *  10.0.0.0/24        192.168.100.206                        31898 i
    *>                    192.168.100.202                        31898 i
*>                    192.168.100.202                        31898 i
   192.168.100.0/24   0.0.0.0                  0             i
*> 192.168.0.0/24   0.0.0.0                  1             i

Total number of prefixes 6

・Router02

Router02(config)# show ip bgp
    BGP table version is 169, local router ID is 192.168.0.212
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path
    *> 10.0.0.0/24        192.168.100.214                        31898 i
    *                     192.168.100.210                        31898 i
    192.168.100.0/24   0.0.0.0                  0             i
    *> 192.168.0.0/24   0.0.0.0                  1             i

    Total number of prefixes 6
    Router02(config)#
    Router02(config)# show ip bgp summary
    BGP router ID 192.168.0.212, local AS number 65000
    2 BGP AS-PATH entries

    Neighbor         V    AS    MsgRcvd MsgSent Up/DownTime   State
    192.168.100.210 4    31898 1851    1693    4:15:53       ESTABLISHED
    192.168.100.214 4    31898 599     547     1:30:43       ESTABLISHED

    Total number of neighbors 2

##●隣接ルーターに広告しているLAN側経路192.168.0.0/24が有ることを確認

Router01(config)# show ip  bgp neighbors 169.254.200.202  advertised-routes
    BGP table version is 251, local router ID is 192.168.100.211
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path
    *> 192.168.0.0/24   169.254.200.201          1             i

    Total number of prefixes 1

Router01(config)# show ip  bgp neighbors 169.254.200.206 advertised-routes
    BGP table version is 251, local router ID is 192.168.100.211
    Local AS number 65000
    Status codes: s - suppressed, * - valid, h - history
                > - best, i - internal
    Origin codes: i - IGP, e - EGP, ? - incomplete

    Network            Next Hop            Metric     LocPrf  Path
    *> 192.168.0.0/24   169.254.200.205          1             i

    Total number of prefixes 1
7
2
1

Register as a new user and use Qiita more conveniently

  1. You get articles that match your needs
  2. You can efficiently read back useful information
  3. You can use dark theme
What you can do with signing up
7
2

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?