Netgear XCM8806 Chassis User Manual - Page 640
Tunnels, Specifying IPv6 Addresses, anything about the con d tunnel
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NETGEAR 8800 User Manual An interface can have up to 255 IPv6 addresses, with at least one being a link local address. IPv4 and IPv6 interfaces can coexist on the same VLAN, allowing both IPv4 and IPv6 networks to coexist on the same Layer 2 broadcast domain. Note: Each IP address and mask assigned to a VLAN must represent a unique IP subnet. You cannot configure the same IP address and subnet on different VLANs within the same virtual router. Tunnels The XCM8800 software supports Layer 3 tunnels, which serve as a transition option, as networks change over from IPv4 to IPv6. The software supports these tunnels on Default-VR. Note: IPv6 tunnels are supported only on Default-VR and not on user VRs. The XCM8800 software supports the use of IPv6-in-IPv4 tunnels (known as configured tunnels or 6in4 tunnels) and IPv6-to-IPv4 tunnels (known as 6to4 tunnels). Both types of tunnels are used to connect regions of IPv6 routing across a region of IPv4 routing. From the perspective of the router, the tunnel across the IPv4 region is one hop, even if multiple IPv4 routers are traversed during transport. A 6in4 tunnel connects one IPv6 region to one other IPv6 region. Multiple 6in4 tunnels can be configured on a single router to connect with multiple IPv6 regions. Dynamic and static routing can be configured across a 6in4 tunnel. Hosts in the IPv6 regions need not know anything about the configured tunnel, since packets destined for remote regions are sent over the tunnel like any other type of routing interface. A 6to4 tunnel connects one IPv6 region with multiple IPv6 regions. Only one 6to4 tunnel can be configured on a single router. Specifying IPv6 Addresses IPv6 Addresses are 128 bits (16 bytes) when compared to the 32 bit IPv4 addresses. The XCM8800 CLI accepts two standard representations for IPv6 addresses, as described in RFC 3513, section 2.2, items 1, 2, and 3. For example, the 128 bits of the address are represented by eight, four-digit hexadecimal numbers separated by colons: 2000:af13:ee10:34c5:800:9192:ba89:2311 3f11:5655:2300:304:0000:0000:7899:acde 640 | Chapter 21. IPv6 Unicast Routing
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