On 1/11/10 12:25 PM, Ole Troan wrote:
Washam,
thanks for all your comments!
Yes, Thanks.
Ole, just a couple of comments on the proposed minor bug fixes...
10. CE IPv4 address definition in sec3:
CE IPv4 address The IPv4 address given to the CE as part of
normal IPv4 Internet access (i.e., configured
via DHCP, PPP, or otherwise). This address may
be global or private [RFC1918] within the 6rd
domain. This address is used by a 6rd CE to
create the 6rd delegated prefix as well as to
send and receive IPv4 encapsulated IPv6
^^^^^^^^^^^^^^
packets.
Should it be IPv6 encapsulated IPv4?
absolutely, fixed.
I think only a hyphen is missing for clarity. The sentence is speaking
about "IPv4-encapsulated IPv6 packets."
Or, "IPv6 packets encapsulated in IPv4 by 6rd" if that's more clear.
11. 1st sentence in sec4:
The 6rd delegated prefix for use at a customer site is created by
combining the 6rd prefix and some or all of the CE IPv4 Address.
^^^^^^
addresses.
actually it is singular. changed "some" to "part of". this is the case where
part of the IPv4 prefix can be pre-configured on all 6rd nodes and therefore you don't need to
encode the complete 32 bit IPv4 address in the IPv6 address.
"part of" alone might not allow for "all" in my reading of the sentence.
If "some or all" is confusing, please change to something like "all or
part of" rather than just "part of".
The 6rd CE and BR SHOULD support the IPv6 Subnet-Router anycast
address [RFC4291] for its own 6rd delegated prefix. This allows, for
example, IPv6 ping messages to be sent to the 6rd Virtual Interface
itself for additional troubleshooting of the internal operation of
6rd at a given CE or BR, over and above an IPv4 ping to the
^^^^^^^^^^^^^^^^^^^ ( I don't get it)
associated CE or BR IPv4 address. In the case of the BR, the IPv4
address used to calculate the 6rd delegated prefix is the configured
BR IPv4 Address.
we just tried to say that with a well known IPv6 address to ping (subnet router
anycast) then that can be used for troubleshooting. in addition to using the
IPv4 address. happy to edit if you have a suggestion of better text.
Washam - Point is that an IPv4 ping, and an IPv6 ping encapsulated in
the same IPv4 address by 6rd both test the same reachability in terms of
the CE to BR or CE to CE communication path, etc. Using IPv6 goes a bit
further than that by ensuring that the 6rd mechanism itself is working
correctly.
- Mark
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