ZXR10 ZSR V2 Configuration Guide (IPv6)
Figure 17-1 6rd Prefix Delegation
The IPv4 address can be a global unicast address or an aggregation of private addresses.
l
Global unicast address
The IPv6 address prefix in a 6rd domain is a CE-based global IPv4 prefix, see
, and can be transmitted in a manual or protocol way (through DHCPv4 or TR-69).
A subnet IPv4 prefix is algorithmically obtained from an IPv6 prefix.
Figure 17-2 A Global Unicast Address
l
Private address aggregation
As shown in
, a private address differs from a global IPv4 unicast address
in that:
à
It reduces the number of bits for an IPv6 prefix.
à
Domain ID overlays the private IPv4 space.
à
The IPv6 prefix is fixed in format.
Figure 17-3 Private Address Aggregation
6rd Address Selection
The CE 6rd configuration can be performed manually, which may be rather difficult in
practice. Controlling the 6rd configuration in a centralized way can be implemented by
carrying it in a CE IPv4 address assigned by a DHCP server.
17-2
SJ-20140504150128-018|2014-05-10 (R1.0)
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