Re: [B.A.T.M.A.N.] [PATCHv2] batman-adv: fix visualization output without neighbors on the primary interface

Matthias Schiffer
2012-05-10T19:47:30Z

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On 05/09/2012 06:10 PM, Martin Hundebøll wrote:
> While reading about TLV's on wikipedia[1], I came across a MAC discovery
> protocol[2], LLDP, which eventually lead me to OpenLLDP[3]. If this also
> works on 802.11, I think we have a winner :)

Okay, so I tested 4 open-source LLDP implementations yesterday [1-4]...
while LLDP works fine over batman-adv, I didn't find it very useful.

1st, implementations [1-3] aren't very configurable, and [4], an
implementation by Intel, is hard to configure and *huge* (stripped
binary ~400KB). Most of the implementations don't support announcing
IPv6 addresses (I'm not sure which anymore), although that isn't really
an important feature for me, as I'd use it mostly to announce hostnames
for the MAC addresses, but I consider software that only supports IPv4
as deprecated. Also, most of these projects seem to be dead for years.

2nd, I think without batman-adv specific extensions LLDP isn't very
useful, as the LLDP daemon only cares about the bat0/bridge MAC
addresses, and not the hardif MAC addresses which are visible in the
vis. The softif MAC addresses are shown in the vis as TT records, of
course, but as one can't really discern between the adresses of the node
itself and those of other clients on the bridge, it's rather useless in
my opinion.

Matthias

[1] http://openlldp.sourceforge.net/
[2] https://code.google.com/p/ladvd/
[3] https://github.com/vincentbernat/lldpd/wiki
[4] http://www.open-lldp.org/open-lldp

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