10
9

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 3 years have passed since last update.

NTT光回線でCiscoルータ(Cisco 891)を用いてIPoEで高速接続を行う

Last updated at Posted at 2020-07-14

目的

NTT光のIPv6オプション(IPoE)を利用していたのですが、クラウド環境との接続を専用ルータで構築したかったため、IPoEでルーティング + VPNを構築できるCiscoルータを導入しました。

導入した機器

某オークションで購入。同じような型番でCisco 892Jなる機種がありましたが、LAN側が10/100BTで心もとないので、LAN/WAN側共にGbEに対応したルータを調達しました。

Cisco 891FJ-K9
image.png

  • 10/100/1000BT x 8port (Switch Port)
  • Uplink GbE Routed Port
  • Uplink FE Routed Port (Backup)
Cisco C891FJ-K9 (revision 1.0) with 446464K/77824K bytes of memory.
Processor board ID FGL19442189
1 FastEthernet interface
9 Gigabit Ethernet interfaces
1 Serial interface
1 ISDN Basic Rate interface
1 terminal line
1 Virtual Private Network (VPN) Module
DRAM configuration is 32 bits wide
255K bytes of non-volatile configuration memory.
250880K bytes of ATA System CompactFlash (Read/Write)

ネットワーク接続イメージ

  • 既存のNTT宅内機器(PR-S300NE)はPPPoEブリッジモードを有効にする
    • PRS300NEの専用ページ「配信済事業者ソフトウェア」より、高度な設定->IPv4の一時停止
    • So-netの会員サポートページが詳しく記載されている
    • 自己責任なので、注意して設定する必要あり
  • IPv6はLAN側に通して、Cisco側でIPoE (IPv4 over IPv6)で接続を行う

image.png

Cisco891設定情報

version 15.3
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime localtime year
service timestamps log datetime localtime year
service password-encryption
service sequence-numbers
!
hostname c891home
!
!
logging buffered 512000
!
no aaa new-model
clock timezone JST 9 0
clock calendar-valid
!
ip dhcp pool MyHome
 network 192.168.2.0 255.255.255.0
 default-router 192.168.2.1
 dns-server 8.8.8.8
 lease 7
!
no ip bootp server
ip domain list flets-east.jp
ip domain list iptvf.jp
ip cef
ipv6 unicast-routing
ipv6 cef
ipv6 dhcp pool STATELESS
 import dns-server
 import domain-name
!
!
interface BRI0
 no ip address
 encapsulation hdlc
 shutdown
 isdn termination multidrop
!
interface FastEthernet0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface GigabitEthernet0
 no ip address
 no cdp enable
!
interface GigabitEthernet1
 no ip address
 no cdp enable
!
interface GigabitEthernet2
 no ip address
 no cdp enable
!
interface GigabitEthernet3
 no ip address
 no cdp enable
!
interface GigabitEthernet4
 no ip address
 no cdp enable
!
interface GigabitEthernet5
 no ip address
 no cdp enable
!
interface GigabitEthernet6
 no ip address
 no cdp enable
!
interface GigabitEthernet7
 no ip address
 no cdp enable
!
interface GigabitEthernet8
 description *** NTT HIKARI PoI ***
 no ip address
 duplex auto
 speed auto
 ipv6 address autoconfig default
 ipv6 enable
 ipv6 dhcp client pd PREFIX
 pppoe enable group global
 pppoe-client dial-pool-number 1
!
interface Vlan1
 description *** Home Network 192_168_2_0 ***
 ip address 192.168.2.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly in
 ipv6 address PREFIX ::1:0:0:0:1/64
 ipv6 enable
 ipv6 nd other-config-flag
 ipv6 dhcp server STATELESS
!
interface Async3
 no ip address
 encapsulation slip
 shutdown
!
interface Dialer1
 bandwidth 1048576
 ip address negotiated
 ip mtu 1454
 ip nat outside
 ip virtual-reassembly in
 encapsulation ppp
 ip tcp adjust-mss 1414
 dialer pool 1
 dialer-group 1
 ppp mtu adaptive
 ppp authentication chap callin
 ppp chap hostname [ISP PPPユーザー名]
 ppp chap password [ISP PPPパスワード]
 no cdp enable
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
ip dns server
ip nat inside source list 1 interface Dialer1 overload
ip route 0.0.0.0 0.0.0.0 Dialer1
!
ip access-list extended remoteaccess
 permit ip 192.168.2.0 0.0.0.255 any log-input
 permit ip 192.168.11.0 0.0.0.255 any log-input
!
dialer-list 1 protocol ip permit
no cdp run
!
access-list 1 permit 192.168.2.0 0.0.0.255
!
control-plane
!
!
line con 0
 no modem enable
line aux 0
line 3
 modem InOut
 speed 115200
 flowcontrol hardware
line vty 0 4
 access-class remoteaccess in
 password 7 XXXXXXXXXXXX
 login
 transport input all
!
end

結果

IPv4 PPPoEよりもかなり高速化することを確認。

  • PR-S300NEのIPv4ルーティングよりも、Cisco側でルーティングすることで高速化
  • IPv4 PPPoEは網側の終端で詰まっていることが有名なのが理解できる。IPv6側のPPPoE終端は空いている。

image.png

参考URL

10
9
0

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
10
9

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?