[quagga-dev 11976] Re: BGP graceful restart and FPM

David Lamparter equinox at opensourcerouting.org
Fri Jan 23 16:53:46 GMT 2015


On Fri, Jan 23, 2015 at 08:28:33AM -0800, J Yu wrote:
> Given that, how could the graceful restart be handled in the forwarding 
> plane? Any pointers/ideas?

Unfortunately, this needs additional code / an extension of the zapi
protocol in order to signal EoR from the protocols to zebra.  This
simply hasn't been implemented yet - GR support in Quagga is incomplete
there.

... patches welcome ...


-David


> > On Tue, 20 Jan 2015, J Yu wrote:
> > > Need some help here --
> > 
> > > I am working on a project that uses FPM to receive the routing table 
> > > update from various protocols, say BGP. In a BGP graceful restart 
> > > scenario, there would be an "End-of-RIB" marker being received by the BGP 
> > > protocol and how does that correlate to the FPM messages that I will be 
> > > receiving? i.e., when would I know as plugged into the FPM for data plane 
> > > forwarding table update to know that I could reconcile with the forwarding 
> > > table?
> Paul Jakma wrote:
> > I don't know the details of the FPM interface, however, as its coming from
> > zebra I don't think it has any knowledge of BGP EoRs in it.
> > 
> > The messages from zebra, either via ZServ or FPM, are not delayed or
> > synchronised with routing protocol daemon events/states.





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