Re: [pim] Unicast BSMs and forwarding

[Bharat Joshi <bharat_joshi at infosys.com>]

Hi Stig,

> The current BSR draft and also RFC 2362 are not very clear whether 
> unicast BSMs should be forwarded or not. My interpretation of 2362 is 
> that they should not be forwarded, while the new draft is not so clear...
> 
> So, I would be interested in hearing your opinion, in particular what 
> current implementations do. We should clarify this in the new draft, 
> question is whether to forward or not to forward...
> 

In our implementation which I did some time back, we had implemented
generation of Unicast BSMs but these unicast BSMs are not forwarded.

> You've probably also seen the discussion on replacing unicast BSMs. We 
> should figure out whether forwarding is good or not, independently of 
> that. If we choose to replace unicast BSMs, then I think we should 
> forward iff we think forwarding unicast BSMs is a good idea.
> 

I do not think the forwarding of Unicast BSM is required. This is just
because Unicast BSM was suppose to be generated only when a router
restart or comes up fresh and the other routers on the same LAN would
already be having the same information so there is no need to forward
these BSMs.

Thanks,
Bharat

> Also, there are several implementations not supporting unicast BSMs at 
> all. So I would also be very interested in hearing whether you have 
> implemented it, or if there are any restrictions. It would be 
> interesting to know why it isn't implemented.
> 
> Stig
> 
> PS, if possible I would like to focus this thread on forwarding and 
> whether unicast BSMs are implemented, not discussing possible 
> replacements. I'll start a separate thread on that, in addition to the 
> ongoing thread (BSR update).
> 
> 
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