Point-to-point /64

[Brian E Carpenter]

On 03/06/2013 08:49, Darren Pilgrim wrote:
...
> I'm not sure about other switches, but for the Catalyst 3750/3750G, it
> means some quirks with IPv6 ACLs.  The 3750/3750D can do ACLs on full
> /128's, but only if the lower 64 bits are EUI64.  

Huh? How can it possibly know that? (see draft-ietf-6man-ug)

   Brian

> Otherwise the ACLs
> only support /64's or shorter.  As I understand it, this is because
> Cisco made room for IPv6 in the TCAM by encoding the tcp/udp port number
> into bits 89-104 of the IPv6 address.  Fortunately the 3750-E doesn't
> have this limitation.
> 
> References:
> http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_52_se/configuration/guide/swv6acl.html#wp4334642
> 
> https://supportforums.cisco.com/thread/2083329
> 
>