日本語フォーラム

 View Only
Back to discussions
Expand all | Collapse all

[CX-Switch]DCHPスヌーピングの設定

This thread has been viewed 4 times

  • 1.  [CX-Switch]DCHPスヌーピングの設定

    Posted Aug 20, 2025 05:29 PM
    Edited by kshimono Aug 21, 2025 04:14 AM

    本投稿では、CXシリーズスイッチでのDHCPスヌーピングの設定方法と動作確認についてまとめています。

    【確認構成】


    【    DHCPスヌーピングの設定】

    1. CXスイッチで、DHCPスヌーピングを有効にします。
       
      !
dhcpv4-snooping
no dhcpv4-snooping option 82
dhcpv4-snooping allow-overwrite-binding
!
    2. 対象のVLANに対して、DHCPスヌーピングを有効化します。
       
      !
vlan 24
    dhcpv4-snooping
!
    3. DHCPサーバが接続されているポートを、trusted ポートとして設定します。
      !
interface 1/1/24
    dhcpv4-snooping trust
!


    【動作確認】

    6200# show dhcpv4-snooping binding

  MacAddress         IP               VLAN  Interface  Time-Left
  -----------------  ---------------  ----  ---------  -------------------
  84:af:ec:73:d9:c9  172.17.24.1      24   1/1/1      86209

6200#
6200# show dhcpv4-snooping statistics

 Packet-Type  Action   Reason                         Count
 -----------  -------  -----------------------------  ---------
 server       forward  from trusted port              2
 client       forward  to trusted port                2
 server       drop     received on untrusted port     0
 server       drop     unauthorized server            0
 client       drop     destination on untrusted port  0
 client       drop     untrusted option 82 field      0
 client       drop     bad DHCP release request       0
 client       drop     failed verify MAC check        0
 client       drop     failed on max-binding limit    0

6200#
6200# show dhcpv4-snooping

 DHCPv4-Snooping Information

  DHCPv4-Snooping         : Yes         Verify MAC Address  : Yes
  Allow Overwrite Binding : Yes         Enabled VLANs       : 24
  IP Binding Disabled VLANs :
  Static Attributes : No
  Client Event Logs : No
  Trust VxLAN Tunnels       : Yes

 Option 82 Configurations

  Untrusted Policy     : drop           Insertion           : No
  Option 82 Remote-id  : mac

 External Storage Information

  Volume Name          : --
  File Name            : --
  Inactive Since       : --
  Error                : --

 Flash Storage Information

  File Write Delay : --

 Active Storage : --

 Authorized Server Configurations

  VRF                               Authorized Servers
  ------------                      ------------------

 Port Information

                   Max       Static    Dynamic
  Port      Trust  Bindings  Bindings  Bindings
  --------  -----  --------  --------  --------
  1/1/1     No     1024      0         1
  1/1/24    Yes    0         0         0

6200#

    #Blog

    #Wired



    -------------------------------------------



Related Content