Re: [babel] Work to do (IHU TLV AE 0)

[Juliusz Chroboczek <[e-mail]>]

> There is one more important thing to check before setting 6126bis in
> stone. The current revision of 6126bis says an IHU TLV may omit Address
> (AE = 0). The current revision of 7298bis needs Address meaningfully set
> so that the receiving node can pick the TS/PC sub-TLV from the IHU TLV
> and translate that to the age threshold in units of seconds.

I need to think that over.

> 1. 6126bis and 7298bis coordinate to have IHU AE 1 or 3 when 7298bis is
>    enabled
> 2. 6126bis simply mandates Address in IHU (AE = 1 or 3)

I'm fine with either of these.

> 3. 7298bis does destination address protection too for all packets (7298
> did only source, as 6126 is multicast-only).

Please clarify.  6126 already allows unicast operation, except for Hello
TLVs (Section 3.1 of RFC 6126).

> I am still considering those options, feedback is welcome. One thing
> I wanted to confirm is whether point-to-point links in Babel are always
> meant to have addresses or they can be address-less.

You need an adress to put in the source field of the IP packet.  For IPv6,
this SHOULD be a link-local address.  For IPv4, this could be an address
assigned to a different interface of the same node, but carrying Babel
over IPv4 is NOT RECOMMENDED.

-- Juliusz