HP 5500 Ei 5500 Si Switch Series Configuration Guide

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Verifying the configuration 
# Display the IPv6 interface settings on Switch A. All of the IPv6 global unicast addresses configured on 
the interface are displayed. 
[SwitchA] display ipv6 interface vlan-interface 2 
Vlan-interface2 current state :UP 
Line protocol current state :UP 
IPv6 is enabled, link-local address is FE80::20F:E2FF:FE00:2 
  Global unicast address(es): 
    3001::1, subnet is 3001::/64 
  Joined group address(es): 
    FF02::1:FF00:0 
    FF02::1:FF00:1 
    FF02::1:FF00:2...

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[SwitchA] display ipv6 interface vlan-interface 1 
Vlan-interface1 current state :UP 
Line protocol current state :UP 
IPv6 is enabled, link-local address is FE80::20F:E2FF:FE00:1C0 
  Global unicast address(es): 
    2001::1, subnet is 2001::/64 
  Joined group address(es): 
    FF02::1:FF00:0 
    FF02::1:FF00:1 
    FF02::1:FF00:1C0 
    FF02::2 
    FF02::1 
  MTU is 1500 bytes 
  ND DAD is enabled, number of DAD attempts: 1 
  ND reachable time is 30000 milliseconds 
  ND retransmit interval...

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# Display the IPv6 interface settings on Switch B. All the IPv6 global unicast addresses configured on the 
interface are displayed. 
[SwitchB] display ipv6 interface vlan-interface 2 
Vlan-interface2 current state :UP 
Line protocol current state :UP 
IPv6 is enabled, link-local address is FE80::20F:E2FF:FE00:1234 
  Global unicast address(es): 
    3001::2, subnet is 3001::/64 
  Joined group address(es): 
    FF02::1:FF00:0 
    FF02::1:FF00:2 
    FF02::1:FF00:1234 
    FF02::2 
    FF02::1...

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 IMPORTANT: 
When you ping a link-local address, you should use the 
-i parameter to specify an interface for the 
link-local address. 
 
[SwitchB] ping ipv6 -c 1 3001::1 
  PING 3001::1 : 56  data bytes, press CTRL_C to break 
    Reply from 3001::1 
    bytes=56 Sequence=1 hop limit=64  time = 2 ms 
 
  --- 3001::1 ping statistics --- 
    1 packet(s) transmitted 
    1 packet(s) received 
    0.00% packet loss 
    round-trip min/avg/max = 2/2/2 ms 
[SwitchB-Vlan-interface2] ping ipv6 -c 1...

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DHCPv6 overview 
Introduction to DHCPv6 
The Dynamic Host Configuration Protocol for IPv6 (DHCPv6) was designed based on IPv6 addressing 
scheme and is used for assigning IPv6 prefixes, IPv6 addresses and other configuration parameters to 
hosts.  
Compared with other IPv6 address allocation methods (such as manual configuration and stateless 
address autoconfiguration), DHCPv6 can: 
•   Record addresses assigned to hosts and assign specific addresses to hosts, thus facilitating network...

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Figure 60 Assignment involving four messages 
 
 
The assignment involving four messages operates in the following steps: 
1. The DHCPv6 client sends out a Solicit message,  requesting an IPv6 address/prefix and other 
configuration parameters. 
2.  If the Solicit message does not contain a Rapid Co mmit option, or if the DHCPv6 server does not 
support rapid assignment even though the Soli cit message contains a Rapid Commit option, the 
DHCPv6 server responds with an Advertise  message, informing...

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If the DHCPv6 client receives no response from the DHCPv6 servers, the client stops using the 
address/prefix when the valid lifetime expires. For more information about the valid lifetime and the 
preferred lifetime, see Configuring IPv6 basics. 
Figure 62 Using the Rebind message for  address/prefix lease renewal 
 
 
Configuring stateless DHCPv6 
After obtaining an IPv6 address/prefix, a device can  use stateless DHCPv6 to obtain other configuration 
parameters from a DHCPv6 server. This...

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parameters. If not, the client ignores the configuration parameters. If multiple replies are received, 
the first received reply will be used. 
Protocols and standards 
•   RFC 3736,  Stateless Dynamic Host Configuration Protocol (DHCP) Service for IPv6  
•   RFC 3315,  Dynamic Host Configuration Protocol for IPv6 (DHCPv6)  
•   RFC 2462,  IPv6 Stateless Address Autoconfiguration  
•   RFC 3633,  IPv6 Prefix Options for Dynamic Host Configuration Protocol (DHCP) version 6   

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Configuring DHCPv6 server 
Overview 
As shown in Figure 64, the DHCPv6 server assigns the DHCPv6 client an IPv6 prefix to facilitate IPv6 
address management and network configuration. After obtaining the IPv6 prefix, the DHCPv6 client 
sends an RA message containing the prefix information to  the subnet where it resides, so that hosts on the 
subnet can automatically configure their IPv6 addresses by using the prefix. 
A device serving as a DHCPv6 server assigns DHCPv6 clients IPv6 prefixes, but...

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A DUID based on link-layer address (DUID-LL) defined in RFC 3315 is used to identify a DHCPv6 
device. Figure 65  sh
 ows the DUID-LL format, where: 
•   DUID type —The device supports DUID-LL as the DUID type with the value of 0x0003. 
•   Hardware type —The device supports Ethernet as the hardware type with the value of 0x0001. 
•   Link layer address —Its value is the bridge MAC address of the device. 
IA 
Identified by an IAID, an Identity Association (IA) provides a construct through which the...