[c-nsp] mVPN mroute flags

[Mattias Gyllenvarg]

So, this is a feature and not an error flag, that indicates that
superfluous PIM messages are not sent.

tis 29 maj 2018 kl 14:36 skrev <adamv0025 at netconsultings.com>:

> > Mattias Gyllenvarg
> > Sent: Tuesday, May 29, 2018 1:05 PM
> >
> > Dear All
> >
> > Does anyone know the function of the "n - BGP C-Mroute suppressed  " flag
> > as seen below?
> >
> > IP Multicast Routing Table
> > Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C -
> Connected,
> >        L - Local, P - Pruned, R - RP-bit set, F - Register flag,
> >        T - SPT-bit set, J - Join SPT, M - MSDP created entry, E -
> Extranet,
> >        X - Proxy Join Timer Running, A - Candidate for MSDP
> Advertisement,
> >        U - URD, I - Received Source Specific Host Report,
> >        Z - Multicast Tunnel, z - MDT-data group sender,
> >        Y - Joined MDT-data group, y - Sending to MDT-data group,
> >        G - Received BGP C-Mroute, g - Sent BGP C-Mroute,
> >        N - Received BGP Shared-Tree Prune, n - BGP C-Mroute suppressed,
> >        Q - Received BGP S-A Route, q - Sent BGP S-A Route,
> >        V - RD & Vector, v - Vector, p - PIM Joins on route,
> >        x - VxLAN group
> >
> >
> > (Cust-SOURCE, Cust-MROUTE), 00:00:04/00:02:55, flags: Tn   <-----
> >   Incoming interface: Lspvif22, RPF nbr <RP in source PE>, Mbgp
> >   Outgoing interface list:
> >     BDI-CUST, Forward/Sparse, 00:00:04/00:03:25
> >
> >
> Well with BGP c-mcast you're basically translating the customer PIM
> messages
> received from attached CE into a BGP routes on PEs -so that you don't need
> to run c-PIM full mesh between all PEs participating in a given mVPN (and
> for each mVPN) -which is simply not practical.
> And same as PIM messages can be supressed in various scenarios (PIM Join
> suppression/PIM register suppression) -the resulting BGP updates (PIM msgs
> translated into BGP routes) can be suppressed too, to reduce the
> unnecessary
> messaging churn.
>
> adam
>
> netconsultings.com
> ::carrier-class solutions for the telecommunications industry::
>
>
> --
Mvh
Mattias Gyllenvarg