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IOS-XE で DHCPv6 を設定する

IOS-XE で動作する IOL を使い、DHCPv6 を構成したコンフィグ例などをメモしておきます。

検証環境

対象 バージョン
IOS-XE 17.12.1

サーバ側のコンフィグ

DHCPv6 Stateless DHCPv6 Stateful 
ipv6 unicast-routing
!
ipv6 dhcp pool IPV6-POOL

 dns-server 2001:1111:1111:1111::A
 domain-name example.com
!
interface Ethernet0/1
 no ip address
 ipv6 address 2001:1111:1111:1111::1/64

 ipv6 nd other-config-flag
 ipv6 dhcp server IPV6-POOL
 no shutdown
!
end

ipv6 unicast-routing
!
ipv6 dhcp pool IPV6-POOL
 address prefix 2001:1111:1111:1111::/64
 dns-server 2001:1111:1111:1111::A
 domain-name example.com
!
interface Ethernet0/1
 no ip address
 ipv6 address 2001:1111:1111:1111::1/64
 ipv6 nd prefix 2001:1111:1111:1111::/64 no-autoconfig
 ipv6 nd managed-config-flag
 ipv6 dhcp server IPV6-POOL
 no shutdown
!
end

クライアント側のコンフィグ

DHCPv6 Stateless DHCPv6 Stateful 
ipv6 unicast-routing
!
interface Ethernet0/1
 no ip address
 ipv6 address autoconfig
 ipv6 enable
 no shutdown
!
end

ipv6 unicast-routing
!
interface Ethernet0/1
 no ip address
 ipv6 address dhcp
 ipv6 enable
 no shutdown
!
end

show コマンド確認

サーバ側

show ipv6 dhcp binding

DHCPv6 Stateless DHCPv6 Stateful 
iol-server# show ipv6 dhcp binding
iol-server#

iol-server# show ipv6 dhcp binding
Client: FE80::A8BB:CCFF:FE00:A10
  DUID: 00030001AABBCC000A00
  Username : unassigned
  VRF : default
  IA NA: IA ID 0x00030001, T1 43200, T2 69120
    Address: 2001:1111:1111:1111:FCA9:C63F:B29B:E1C9
            preferred lifetime 86400, valid lifetime 172800
            expires at Aug 24 2024 03:46 PM (172762 seconds)

show ipv6 dhcp pool

DHCPv6 Stateless DHCPv6 Stateful 
iol-server# show ipv6 dhcp pool
DHCPv6 pool: IPV6-POOL
  DNS server: 2001:1111:1111:1111::A
  Domain name: example.com
  Active clients: 0

iol-server# show ipv6 dhcp pool
DHCPv6 pool: IPV6-POOL
  Address allocation prefix: 2001:1111:1111:1111::/64 valid 172800 preferred 86400 (1 in use, 0 conflicts)
  DNS server: 2001:1111:1111:1111::A
  Domain name: example.com
  Active clients: 1

クライアント側

show ipv6 interface

DHCPv6 Stateless DHCPv6 Stateful 
iol-client# show ipv6 interface Ethernet0/1
Ethernet0/1 is up, line protocol is up
  IPv6 is enabled, link-local address is FE80::A8BB:CCFF:FE00:810
  No Virtual link-local address(es):
  Stateless address autoconfig enabled
  Global unicast address(es):
    2001:1111:1111:1111:A8BB:CCFF:FE00:810, subnet is 2001:1111:1111:1111::/64 [EUI/CAL/PRE]
      valid lifetime 2591849 preferred lifetime 604649
  Joined group address(es):
    FF02::1
    FF02::2
    FF02::1:FF00:810
  MTU is 1500 bytes
  ICMP error messages limited to one every 100 milliseconds
  ICMP redirects are enabled
  ICMP unreachables are sent
  ND DAD is enabled, number of DAD attempts: 1
  ND reachable time is 30000 milliseconds (using 30000)
  ND advertised reachable time is 0 (unspecified)
  ND advertised retransmit interval is 0 (unspecified)
  ND router advertisements are sent every 200 seconds
  ND router advertisements live for 1800 seconds
  ND advertised default router preference is Medium
  Hosts use stateless autoconfig for addresses.

iol-client# show ipv6 interface Ethernet0/1
Ethernet0/1 is up, line protocol is up
  IPv6 is enabled, link-local address is FE80::A8BB:CCFF:FE00:A10
  No Virtual link-local address(es):
  Global unicast address(es):
    2001:1111:1111:1111:FCA9:C63F:B29B:E1C9, subnet is 2001:1111:1111:1111:FCA9:C63F:B29B:E1C9/128
  Joined group address(es):
    FF02::1
    FF02::2
    FF02::1:FF00:A10
    FF02::1:FF9B:E1C9
  MTU is 1500 bytes
  ICMP error messages limited to one every 100 milliseconds
  ICMP redirects are enabled
  ICMP unreachables are sent
  ND DAD is enabled, number of DAD attempts: 1
  ND reachable time is 30000 milliseconds (using 30000)
  ND advertised reachable time is 0 (unspecified)
  ND advertised retransmit interval is 0 (unspecified)
  ND router advertisements are sent every 200 seconds
  ND router advertisements live for 1800 seconds
  ND advertised default router preference is Medium
  Hosts use stateless autoconfig for addresses.