Remi,
> Sec. 4.4 of draft-mdt-softwire-mapping-address-and-port-03 says:
> "Default Mapping Rule:
> {2001:db8:0001:0000:<interface-id>:/128 (Rule IPv6 prefix),
> 0.0.0.0/0 (Rule IPv4 prefix),
> 192.0.2.1 (BR IPv4 address)}
>
> Example 3: Default Mapping Rule
>
> In most implementations of a routing table, the next-hop address must be of
> the same address family as the prefix. To satisfy this requirement a BR IPv4
> address is included in the rule. Giving a default route in the IPv4 routing
> table:
> 0.0.0.0 -> 192.0.2.1, MAP-Interface0"
>
> I must admit I found this very confusing:
> - It seems to be a purely internal matter, having therefore no place in a
> proposed standard.
> - In an internal IPv4 routing table, any never-assigned address seems
> sufficient (no need for dependence on the BR IPv4 address).
the idea of the BR also being part of the domain has some benefits.
e.g. it is possible to IPv4 ping the default gateway. it isn't strictly
necessary as you say, but I think it has value in troubleshooting.
> - How a MAP-T CE could get the BR IPv4 address isn't specified (no DHCPv6
> parameter specified for its transmission).
manual configuration.
cheers,
Ole
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