Netgear XCM8810 Chassis User Manual - Page 653
Hardware Forwarding Limitations, Hardware Tunnel Support, Routing Configuration Example
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NETGEAR 8800 User Manual Hardware Forwarding Limitations NETGEAR 8800 switches support hardware forwarding for up to 256 routes with masks greater than 64 bits. This support was added in XCM8800 using a hardware table designed for this purpose. When IPv6 forwarding is enabled, the switch behavior is as follows: • If no space is available in the hardware table, there is no guarantee that traffic for that route will be properly routed. • If enabled, route compression can make room for additional routes by reducing the number of entries in the hardware table. • When an IPv6 address with a mask greater that 64 bits is configured on a VLAN or tunnel, that address is automatically added to the hardware table. Hardware Tunnel Support Tunnel traffic is forwarded in software and the statistics can be viewed from the show ipstats ipv6 command. Note: The MTU for IPv6 Tunnels is set to 1480 bytes, and is not user-configurable. Configuring jumbo frames has no effect on the MTU size for IPv6 tunnels. Routing Configuration Example Figure 67 illustrates a BlackDiamond switch that has three VLANs defined as follows: • Finance • Protocol-sensitive VLAN using IPv6 protocol • All ports on slots 1 and 3 have been assigned. • IP address 2001:db8:35::1/48. • Personnel • Protocol-sensitive VLAN using the IPv6 protocol. • All ports on slots 2 and 4 have been assigned. • IP address 2001:db8:36::1/48. • MyCompany • Port-based VLAN. • All ports on slots 1 through 4 have been assigned. Chapter 21. IPv6 Unicast Routing | 653
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