ICT Diary

Network、Server系の内容を気まぐれにUPしていく。

Juniper SRX DHCP Configuration (address-assignment)

Network

構成

トポロジー

[FW]----------------[PC(RT)]
　 |<-------------->|
          Local
       10.0.0.0/24

構成

  • 機器
    • FW: SRX (DHCP-Server)
    • PC: CiscoRT (RouterをPCとして利用)
  • DHCP情報
    • セグメント: 10.0.0.0/24
    • デフォルトGW: 10.0.0.1
    • DNS: 8.8.8.8, 8.8.4.4 (Google)
    • リースタイム: 86400
    • Pool名: TEST
    • 配布範囲:
      • Name : TEST-RANGE
      • Low : 10.0.0.2
      • High : 10.0.0.200
    • 除外するIP : 10.0.0.100
    • DHCP受けI/F: ge-0/0/0
    • 固定IP:
      • 管理名: hoge (任意の名前)
      • MAC-Address: xx:xx:xx:xx:xx:xx
      • IP-Address: 10.0.0.99

前提設定

RT (CiscoRT)

interface GigabitEthernet0/0
 ip address dhcp

FW

set interfaces ge-0/0/0 unit 0 family inet address 10.0.0.1/24

DHCP設定

全設定

set access address-assignment pool TEST family inet network 10.0.0.0/24
set access address-assignment pool TEST family inet range TEST-RANGE low 10.0.0.2
set access address-assignment pool TEST family inet range TEST-RANGE high 10.0.0.200
set access address-assignment pool TEST family inet dhcp-attributes maximum-lease-time 86400
set access address-assignment pool TEST family inet dhcp-attributes name-server 8.8.8.8
set access address-assignment pool TEST family inet dhcp-attributes name-server 8.8.4.4
set access address-assignment pool TEST family inet dhcp-attributes router 10.0.0.1
set access address-assignment pool TEST family inet excluded-address 10.0.0.100
set system services dhcp-local-server group TEST interface ge-0/0/0.0

set security zones security-zone trust interfaces ge-0/0/0.0 host-inbound-traffic system-services dhcp
set security zones security-zone trust interfaces ge-0/0/0.0 host-inbound-traffic system-services ping

設定詳細

set access address-assignment pool [NAME] family inet network [SEGMENT]                             :配布するセグメントを指定
set access address-assignment pool [NAME] family inet range [RANGE-NAME] low [LOW-IP]               :IP配布範囲の下限を指定
set access address-assignment pool [NAME] family inet range [RANGE-NAME] high [HIGH-IP]             :IP配布範囲の上限を指定
set access address-assignment pool [NAME] family inet dhcp-attributes maximum-lease-time [TIME]     :DHCPの最大リースタイムを指定 (Second)
set access address-assignment pool [NAME] family inet dhcp-attributes name-server [DNS]             :DNSのIPを指定 (最初に指定したものがプライマリ)
set access address-assignment pool [NAME] family inet dhcp-attributes router [GW]                   :デフォルトゲートウェイのIPを指定
set access address-assignment pool [NAME] family inet excluded-address [EXC-IP]                     :IP配布範囲から除外するIPを指定
set access address-assignment pool [NAME] family inet dhcp-attributes domain-name [DOMAIN]          :ドメイン名の指定
set system services dhcp-local-server group [NAME] interface [I/F]                                  :DHCPグループを動作させるI/Fを指定

set security zones security-zone [ZONE] interfaces [I/F] host-inbound-traffic system-services dhcp  :I/FでDHCPリクエスト受付を許可
set security zones security-zone [ZONE] interfaces [I/F] host-inbound-traffic system-services ping  :I/Fでping受付を許可

DHCP関係コマンド

show access address-assignment | display set    :DHCPのConfig確認
show dhcp server binding                        :払い出し済みのIPを確認
clear dhcp server binding                       :払い出しIPのクリア

設定パターン

ホストに特定のIPを割り当て (最初の設定に以下のものを追加)

  • 設定
set access address-assignment pool TEST family inet host hoge hardware-address xx:xx:xx:xx:xx:xx
set access address-assignment pool TEST family inet host hoge ip-address 10.0.0.99
  • 設定詳細
set access address-assignment pool TEST family inet host hoge ip-address [IP]                 :割り当てるIPを指定
set access address-assignment pool [NAME] family inet host hoge hardware-address [MAC-ADDR]   :割り当てる対象を指定