Netgear XCM8810 - 8800 SERIES 10-SLOT CHASSIS SWITCH ユーザーズマニュアル

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.

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

 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.