HPE FlexNetwork 5130 EI Series Layer 3-Ip Services Configuration Guide

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Figure 63 Assignment involving four messages
Address/prefix lease renewal
An IPv6 address/prefix assigned by a DHCPv6 server has a valid lifetime. After the valid lifetime
expires, the DHCPv6 client cannot use the IPv6 address/prefix. To use the IPv6 address/prefix, the
DHCPv6 client must renew the lease time.
Figure 64 Using the Renew message for address/prefix lease renewal
As shown in Figure 64, at T1, the DHCPv6 client sends a Renew message to the DHCPv6 server.
The recommended value of T1 is half the preferred lifetime. The DHCPv6 server responds with a
Reply message, informing the client whether the lease is renewed.
Figure 65 Using the Rebind message for address/prefix lease renewal
As shown in Figure 65:
• If the DHCPv6 client does not receive a response from the DHCPv6 server after sending a
Renew message at T1, it multicasts a Rebind message to all DHCPv6 servers at T2. Typically,
the value of T2 is 0.8 times the preferred lifetime.
• The DHCPv6 server responds with a Reply message, informing the client whether the lease is
renewed.
• If the DHCPv6 client does not receive a response from any DHCPv6 server before the valid
lifetime expires, the client stops using the address/prefix.
For more information about the valid lifetime and the preferred lifetime, see "Configuring basic IPv6
set
tings."

HPE FlexNetwork 5130 EI Series Specifications

General

Brand	HPE
Model	FlexNetwork 5130 EI Series
Category	Switch
Language	English