SNR S2940-8G-v2, Configuration Manual

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SNR S2940-8G-v2 Switch Configuration Guide
DHCPv6 Configuration
a SOLICIT packet to all the DHCP delay delegation and server with broadcast address as
FF02::1:2.
2. Any DHCP server which receives the request, will reply the client with an ADVERTISE mes-
sage, which includes the identity of the server - DUID, and its priority.
3. It is possible that the client receives multiple ADVERTISE messages. The client should select
one and reply it with a REQUEST message to request the address which is advertised in the
ADVERTISE message.
4. The selected DHCPv6 server then confirms the client about the IPv6 address and any other
configuration with the REPLY message.
The above four steps finish a Dynamic host configuration assignment process. However, if the
DHCPv6 server and the DHCPv6 client are not in the same network, the server will not receive the
DHCPv6 broadcast packets sent by the client, therefore no DHCPv6 packets will be sent to the
client by the server. In this case, a DHCPv6 relay is required to forward such DHCPv6 packets so
that the DHCPv6 packets exchange can be completed between the DHCPv6 client and server.
At the time this manual is written, DHCPv6 server, relay and prefix delegation client have been
implemented on the switch. When the DHCPv6 relay receives any messages from the DHCPv6
client, it will encapsulate the request in a Relay-forward packet and deliver it to the next DHCPv6
relay or the DHCPv6 server. The DHCPv6 messages coming from the server will be encapsulated
as relay reply packets to the DHCPv6 relay. The relay then removes the encapsulation and delivers
it the DHCPv6 client or the next DHCPv6 relay in the network.
For DHCPv6 prefix delegation where DHCPv6 server is configured on the PE router and
DHCPv6 client it configured on the CPE router, the CPE router is able to send address prefix
allocation request to the PE router and get a pre-configured address prefix, but not set the ad-
dress prefix manually. The protocol negotiation between the client and the prefix delegation client
is quite similar to that when getting a DHCPv6 address. Then the CPE router divides the allocated
prefix - whose length should be less than 64 characters, into 64 subnets. The divided address pre-
fix will be advertised through routing advertisement messages (RA) to the host directly connected
to the client.
35.2 DHCPv6 Server Configuration
DHCPv6 server configuration task list as below:
1. To enable/disable DHCPv6 service
2. To configure DHCPv6 address pool
(a) To achieve/delete DHCPv6 address pool
(b) To configure parameter of DHCPv6 address pool
3. To enable DHCPv6 server function on port
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