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Configuration Guide - IP Service

S7700 and S9700 V200R013C00

This document describes the configurations of IP service, including IP address, ARP, DHCP, DNS, mDNS gateway, mDNS relay, UDP Helper, IP performance optimization, IPv6, DHCPv6, IPv6 DNS, IPv6 over IPv4 tunnel and IPv4 over IPv6 tunnel.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Example for Configuring the DHCPv6 Server and Client (DHCPv6 Stateful Mode)

Example for Configuring the DHCPv6 Server and Client (DHCPv6 Stateful Mode)

Networking Requirements

As shown in Figure 10-15, SwitchA and SwitchB are located on the same link. SwitchA is deployed as the DHCPv6 server and SwitchB is deployed as the DHCPv6 client to enable SwitchB to obtain an IPv6 address and DNS server address through the DHCPv6 server.

Figure 10-15  Networking diagram for configuring the DHCPv6 server and client

Configuration Roadmap

The configuration roadmap is as follows:
  1. On SwitchA, configure the DHCPv6 server function so that the DHCPv6 server can dynamically assign the IPv6 address and DNS server address to the DHCPv6 client. Configure IPv6 addresses for interfaces, configure an IPv6 address pool, and enable the DHCPv6 server function on the interfaces.

  2. On SwitchB, configure the DHCPv6 client function so that the DHCPv6 client can dynamically obtain the IPv6 address and DNS server address through the DHCPv6 server. Configure the IPv6 function and enable the DHCPv6 client function on the interfaces.

NOTE:

Ensure that the DHCPv6 and DNS servers are routable to each other before the configuration.

Procedure

  1. Configure the DHCPv6 server function on SwitchA.

    # Configure an IPv6 address for the interface.

    <HUAWEI> system-view
    [HUAWEI] sysname SwitchA
    [SwitchA] ipv6
    [SwitchA] vlan 100
    [SwitchA-vlan100] quit
    [SwitchA] interface gigabitethernet 1/0/1
    [SwitchA-GigabitEthernet1/0/1] port link-type trunk
    [SwitchA-GigabitEthernet1/0/1] port trunk allow-pass vlan 100
    [SwitchA-GigabitEthernet1/0/1] quit
    [SwitchA] interface vlanif 100
    [SwitchA-Vlanif100] ipv6 enable
    [SwitchA-Vlanif100] ipv6 address fc00:3::1/64
    [SwitchA-Vlanif100] quit

    # Configure an IPv6 address pool.

    [SwitchA] dhcpv6 pool pool1
    [SwitchA-dhcpv6-pool-pool1] address prefix fc00:3::/64
    [SwitchA-dhcpv6-pool-pool1] excluded-address fc00:3::1 
    [SwitchA-dhcpv6-pool-pool1] dns-server fc00:4::1
    [SwitchA-dhcpv6-pool-pool1] quit 

    # Enable the DHCPv6 server function on the interface.

    [SwitchA] dhcp enable
    [SwitchA] interface vlanif 100
    [SwitchA-Vlanif100] dhcpv6 server pool1
    

    # Enable the RA message advertisement function to make the DHCPv6 client learn the default route destined for the IPv6 gateway through RA messages. Configure the M and O flags of the advertised RA messages to make the DHCPv6 client obtain an IPv6 address and other network parameters using DHCP.

    [SwitchA-Vlanif100] undo ipv6 nd ra halt
    [SwitchA-Vlanif100] ipv6 nd autoconfig managed-address-flag
    [SwitchA-Vlanif100] ipv6 nd autoconfig other-flag
    [SwitchA-Vlanif100] quit
    [SwitchA] quit

  2. Configure the DHCPv6 client function on SwitchB.

    # Configure the IPv6 function on the interface.

    <HUAWEI> system-view
    [HUAWEI] sysname SwitchB
    [SwitchB] dhcp enable
    [SwitchB] ipv6
    [SwitchB] vlan 100
    [SwitchB-vlan100] quit
    [SwitchB] interface gigabitethernet 1/0/1
    [SwitchB-GigabitEthernet1/0/1] port link-type trunk
    [SwitchB-GigabitEthernet1/0/1] port trunk allow-pass vlan 100
    [SwitchB-GigabitEthernet1/0/1] quit
    [SwitchB] interface vlanif 100
    [SwitchB-Vlanif100] ipv6 enable
    [SwitchB-Vlanif100] ipv6 address auto link-local
    

    # Enable the DHCPv6 client function on the interface.

    [SwitchB-Vlanif100] ipv6 address auto dhcp
    

    # Configure the DHCPv6 client to learn the default route destined for the IPv6 gateway through RA messages.

    [SwitchB-Vlanif100] ipv6 address auto global default
    [SwitchB-Vlanif100] quit
    [SwitchB] quit

  3. Verify the configuration.

    # On SwitchA, run the display dhcpv6 pool command to check the configuration and address assignment of the IPv6 address pool pool1.

    <SwitchA> display dhcpv6 pool pool1
    DHCPv6 pool: pool1
      Address prefix: FC00:3::/64
        Lifetime valid 172800 seconds, preferred 86400 seconds
        1 in use, 0 conflicts
      excluded-address FC00:3::1 
      1 excluded addresses 
      Information refresh time: 86400
      DNS server address: FC00:4::1
      conflict-address expire-time: 172800
      renew-time-percent : 50
      rebind-time-percent : 80
      Active normal clients: 1
      Logging : Disable
    <SwitchA> display dhcpv6 pool pool1 allocated address
    Address                                 Valid    Expires             Left
    -------------------------------------------------------------------------------
    FC00:3::2                               172800   2014-03-29 05:47:19 159594
    -------------------------------------------------------------------------------
    Total : 1 

    # On SwitchA, run the display ipv6 interface vlanif 100 command to check the IPv6 link-local address of VLANIF 100, so that you can further check whether the default route destined for the IPv6 gateway is generated on the DHCPv6 client.

    <SwitchA> display ipv6 interface vlanif 100                                                                                          
    Vlanif100 current state : UP                                                                                                        
    IPv6 protocol current state : UP                                                                                                    
    IPv6 is enabled, link-local address is FE80::2EAB:FF:FE98:15BB                                                                      
      Global unicast address(es):                                                                                                       
        FC00:3::1, subnet is FC00:3::/64                                                                                                
      Joined group address(es):                                                                                                         
        FF02::1:2                                                                                                                       
        FF02::1:FF00:1                                                                                                                  
        FF02::1:FF98:15BB                                                                                                               
        FF02::2                                                                                                                         
        FF02::1                                                                                                                         
    ……

    # On SwitchB, run the display dhcpv6 client command to check the DHCPv6 client configuration.

    <SwitchB> display dhcpv6 client
    Vlanif100 is in stateful DHCPv6 client mode.
    Stateful DHCPv6 client is in BOUND state.
    Preferred server DUID   : 00030001000B099C1162
      Reachable via address : FE80::20B:9FF:FE03:AC9B
    IA NA IA ID 0x000004E1 T1 43200 T2 69120
      Obtained     : 2014-03-26 17:47:15
      Renews       : 2014-03-27 05:47:15
      Rebinds      : 2014-03-27 12:59:15
      Address      : FC00:3::2
        Lifetime valid 172800 seconds, preferred 86400 seconds
        Expires at 2014-03-28 17:47:15(172726 seconds left)
    DNS server     : FC00:4::1

    # On SwitchB, run the display ipv6 routing-table command to check the default route destined for the IPv6 gateway on the DHCPv6 client.

    Routing Table : Public                                                                                                              
            Destinations : 4        Routes : 4                                                                                          
                                                                                                                                        
     Destination  : ::                              PrefixLength : 0                                                                    
     NextHop      : FE80::2EAB:FF:FE98:15BB         Preference   : 64                                                                   
     Cost         : 0                               Protocol     : Unr                                                                  
     RelayNextHop : ::                              TunnelID     : 0x0                                                                  
     Interface    : Vlanif100                       Flags        : D                                                                    
                                                                                                                                        
     Destination  : ::1                             PrefixLength : 128                                                                  
     NextHop      : ::1                             Preference   : 0                                                                    
     Cost         : 0                               Protocol     : Direct                                                               
     RelayNextHop : ::                              TunnelID     : 0x0                                                                  
     Interface    : InLoopBack0                     Flags        : D                                                                    
                                                                                                                                        
     Destination  : FC00:3::2                       PrefixLength : 128                                                                  
     NextHop      : ::1                             Preference   : 0                                                                    
     Cost         : 0                               Protocol     : Direct                                                               
     RelayNextHop : ::                              TunnelID     : 0x0                                                                  
     Interface    : Vlanif100                       Flags        : D                                                                    
                                                                                                                                        
     Destination  : FE80::                          PrefixLength : 10                                                                   
     NextHop      : ::                              Preference   : 0                                                                    
     Cost         : 0                               Protocol     : Direct                                                               
     RelayNextHop : ::                              TunnelID     : 0x0                                                                  
     Interface    : NULL0                           Flags        : D 

Configuration Files

  • SwitchA configuration file

    #
    sysname SwitchA
    #
    ipv6
    #
    vlan batch 100
    #
    dhcp enable
    #
    dhcpv6 pool pool1
     address prefix FC00:3::/64
     excluded-address FC00:3::1
     dns-server FC00:4::1
    #
    interface Vlanif100
     ipv6 enable
     ipv6 address FC00:3::1/64
     undo ipv6 nd ra halt                                                                                                               
     ipv6 nd autoconfig managed-address-flag                                                                                            
     ipv6 nd autoconfig other-flag
     dhcpv6 server pool1
    #
    interface GigabitEthernet1/0/1
     port link-type trunk
     port trunk allow-pass vlan 100
    #
    return
  • SwitchB configuration file

    #
    sysname SwitchB
    #
    ipv6
    #
    vlan batch 100
    #
    dhcp enable
    #
    interface Vlanif100
     ipv6 enable
     ipv6 address auto link-local
     ipv6 address auto global default
     ipv6 address auto dhcp
    #
    interface GigabitEthernet1/0/1
     port link-type trunk
     port trunk allow-pass vlan 100
    #
    return
Translation
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Updated: 2019-04-20

Document ID: EDOC1100065743

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