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system-view
2. Enter interface view.
interface interface-type interface-number
3. Manually assign an IPv6 link-local address to the interface.
ipv6 address ipv6-address link-local
By default, no link-local address is configured on an interface.
Configuring an IPv6 anycast address
1. Enter system view.
system-view
2. Enter interface view.
interface interface-type interface-number
3. Configure an IPv6 anycast address.
ipv6 address { ipv6-address prefix-length |
ipv6-address/prefix-length } anycast
By default, no IPv6 anycast address is configured on an interface.
Configuring path MTU discovery
Setting the interface MTU
About interface MTU
IPv6 routers do not support packet fragmentation. If a packet exceeds the MTU of the output
interface, the router discards the packet and sends a packet too big message to the source host.
This message contains the interface MTU. The source host fragments the packet according to the
returned MTU. To avoid traffic overload due to packet dropping, set a proper interface MTU.
Procedure
1. Enter system view.
system-view
2. Enter interface view.
interface interface-type interface-number
3. Set the interface MTU.
ipv6 mtu size
By default, no interface MTU is set.
Setting a static path MTU for an IPv6 address
About static path MTU for an IPv6 address
You can set a static path MTU for an IPv6 address. Before sending a packet to the IPv6 address, the
device compares the output interface MTU with the static path MTU. If the packet size exceeds the
smaller one of the two values, the device fragments the packet according to the smaller value. After
sending the fragmented packets, the device dynamically finds the path MTU to a destination host
(see "IPv6 path MTU discovery").
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