Ipv6 Network Compatibility; Ipv6 Native Support; Figure 9-38 Ipv6-Ipv4 Interaction - Cisco ONS 15600 Reference Manual

9.7 IPv6 Network Compatibility

9.7 IPv6 Network Compatibility
IPv6 simplifies IP configuration and administration and has a larger address space than IPv4 to support
the future growth of the Internet and Internet related technologies. It uses 128-bit addresses as against
the 32-bit used in IPv4 addresses. Also, IPv6 gives more flexibility in designing newer addressing
architectures.
Cisco ONS 15600 can function in an IPv6 network when an Internet router that supports Network
Address Translation-Protocol Translation (NAT-PT) is positioned between the GNE, such as an ONS
15600, and the client workstation. NAT-PT is a migration tool that helps users transition from IPv4
networks to IPv6 networks. NAT-PT is defined in RFC-2766. IPv4 and IPv6 nodes communicate with
each other using NAT-PT by allowing both IPv6 and IPv4 stacks to interface between the IPv6 DCN and
the IPv4 DCC networks.
IPv6 is supported on Cisco ONS 15600 Software R8.0 and later with an external NAT-PT router.
Note

9.8 IPv6 Native Support

Cisco ONS 15600 Software R9.0 and later supports native IPv6. ONS 15600 can be managed over IPv6
DCN networks by enabling the IPv6 feature. After you enable IPv6 in addition to IPv4, you can use CTC,
TL1, and SNMP over an IPv6 DCN to manage ONS 15600. Each NE can be assigned an IPv6 address
in addition to the IPv4 address. You can access the NE by entering the IPv4 address, an IPv6 address or
the DNS name of the device. The IPv6 address is assigned only on the LAN interface of the NE.
DCC/GCC interfaces use the IPv4 address.
By default, when IPv6 is enabled, the node processes both IPv4 and IPv6 packets on the LAN interface.
If you want to process only IPv6 packets, you need to disable IPv4 on the node. Before you disable IPv4,
ensure that IPv6 is enabled and the node is not in multishelf mode.
Figure 9-38
Figure 9-38
IPv6 Address:
3ffe:b00:ffff:1::2
IPv6 Address:
3ffe:b00:ffff:1::3
IPv4 Address:
IPv6 Address:
3ffe:b00:ffff:1::4
IPv4 Address:
Cisco ONS 15600 SDH Reference Manual, Release 9.0
9-56
shows how an IPv6 DCN interacts with and IPv4 DCC.
IPv6-IPv4 Interaction
NMS
ENE B
10.10.10.10
ENE C
10.10.10.20
IPv6
DCN
DCC IPv4 Network
Chapter 9 Management Network Connectivity
GNE A
IPv6 Address:
3ffe:b00:ffff:1::5
IPv4 Address:
10.10.20.40
ENE D
IPv6 Address:
3ffe:b00:ffff:1::6
IPv4 Address:
10.10.20.30
78-18400-01