[dev] some questions about zebra in frr

[sudhanshu kumar]

Hi,
Thanks for the reply. But my question was why there are 2 types of node in
"struct route_node".  (MTYPE_ROUTE_SRC_NODE and MTYPE_ROUTE_NODE).
e.g., rnode_is_srcnode() and rnode_is_dstnode() .

Thanks,
Sudhanshu

On Mon, Apr 29, 2019 at 5:05 PM Donald Sharp <sharpd at cumulusnetworks.com>
wrote:

> `struct route_node` -> Table route node data structure contains the
> prefix and some small additional data useful for keeping track of the
> node in the table.
> `struct rib_dest_t` -> A rib node that we have received data about it
> from an upper level protocol.  Contains some additional tracking
> information that zebra needs to keep track of in relation to the
> particular prefix in the rib.  We do not create a rib_dest_t per
> route_node.  We only create a rib_dest_t( with one caveat ) per
> routing entry given to zebra.
> `struct route_entry` -> A route handed to us from another protocol.
> We can have one of these per protocol running possibly.  zebra needs
> to track the different protocols attempting to install as well as some
> additional data unique to that route.  Zebra chooses one of these
> route entries to install into the kernel.
>
> I cannot answer the second question.
>
> donald
>
> On Mon, Apr 29, 2019 at 6:51 AM sudhanshu kumar <sudhanshu22 at gmail.com>
> wrote:
> >
> > Hi,
> > I have 2 questions about zebra in frr.
> > 1. why do we maintain 2 types (source and destination route type) in
> zebra. I am not sure what source route type means ? Is it the source of the
> route (like the packet source or the neighbor from which the route got
> learnt) ?
> > 2.  How does frr routing stack interact with SONIC platform. I see that
> it has a TCP socket with SONIC which it uses to send messages for all
> protocols. Is it true ?
> >
> > Thanks,
> > Sudhanshu
> > ---------- Forwarded message ---------
> > From: sudhanshu kumar <sudhanshu22 at gmail.com>
> > Date: Thu, Apr 25, 2019 at 12:06 PM
> > Subject: help: frr interaction with SONIC
> > To: <dev-request at lists.frrouting.org>
> >
> >
> > Hi,
> > I would like to know how does frr routing stack interact with SONIC
> platform. I see that it has a TCP socket with SONIC which it uses to send
> messages for all protocols. Is it true ?
> >
> > Thanks & Regards,
> > Sudhanshu
> > _______________________________________________
> > dev mailing list
> > dev at lists.frrouting.org
> > https://lists.frrouting.org/listinfo/dev
>
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