ipv6 question

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1

Hi

I read ipv6forum.pdf about ipv6

It said

MTU must be at least 1280 bytes (1500+)
Does it mean to set the mtu over 1500

I set my linux box eth0 as 2001:db8:cafe:1111::12/64 but I can't ping it
inet6 2001:db8:cafe:1111::12/64 scope global tentative

ls it this problem? Thank you

# ping6 2001:db8:cafe:1111::12
PING 2001:db8:cafe:1111::12(2001:db8:cafe:1111::12) 56
      
data bytes
    

From ::1 icmp_seq=1 Destination unreachable:
      
Address unreachable
    
From ::1 icmp_seq=2 Destination unreachable:
      
Address unreachable

2

Hi

I read ipv6forum.pdf about ipv6

It said

MTU must be at least 1280 bytes (1500+)
Does it mean to set the mtu over 1500

No, it simply means that the minimum MTU for IPv6 is 1280.

I set my linux box eth0 as 2001:db8:cafe:1111::12/64 but I can't ping it
inet6 2001:db8:cafe:1111::12/64 scope global tentative

ls it this problem? Thank you

Where are you pinging it from? also, the 2001:db8::/32 prefix is used
for "documentation purposes" and might be handled differently by the
TCP/IP stack.

3

Works fine in Linux - I've been using it (in an isolated training room
setup) for years.

Regards, K.

4

> Where are you pinging it from? also, the 2001:db8::/32 prefix is used
> for "documentation purposes" and might be handled differently by the
> TCP/IP stack.

Works fine in Linux - I've been using it (in an isolated training room
setup) for years.

Regards, K.

It is not a good idea to use the documentation prefix for anything
other than documentation. How hard is it to generate a ULA and use
it?