| Message ID | 20230321130127.264822-8-idosch@nvidia.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | be24eab05d664ff63d1216498e5f2e6986ccafc7 |
| Delegated to: | David Ahern |
| Headers | show |
| Series | bridge: mdb: Add VXLAN attributes support | expand |
| Context | Check | Description |
|---|---|---|
| netdev/tree_selection | success | Not a local patch |
On 21/03/2023 15:01, Ido Schimmel wrote: > Document the catchall MDB entries used to transmit IPv4 and IPv6 > unregistered multicast packets. > > In deployments where inter-subnet multicast forwarding is used, not all > the VTEPs in a tenant domain are members in all the broadcast domains. > It is therefore advantageous to transmit BULL (broadcast, unknown > unicast and link-local multicast) and unregistered IP multicast traffic > on different tunnels. If the same tunnel was used, a VTEP only > interested in IP multicast traffic would also pull all the BULL traffic > and drop it as it is not a member in the originating broadcast domain > [1]. > > [1] https://datatracker.ietf.org/doc/html/draft-ietf-bess-evpn-irb-mcast#section-2.6 > > Signed-off-by: Ido Schimmel <idosch@nvidia.com> > --- > man/man8/bridge.8 | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/man/man8/bridge.8 b/man/man8/bridge.8 > index 9753ce9e92b4..4006ad23ea74 100644 > --- a/man/man8/bridge.8 > +++ b/man/man8/bridge.8 > @@ -1013,6 +1013,12 @@ device creation will be used. > device name of the outgoing interface for the VXLAN device to reach the remote > VXLAN tunnel endpoint. > > +.in -8 > +The 0.0.0.0 and :: MDB entries are special catchall entries used to flood IPv4 > +and IPv6 unregistered multicast packets, respectively. Therefore, when these > +entries are programmed, the catchall 00:00:00:00:00:00 FDB entry will only > +flood broadcast, unknown unicast and link-local multicast. > + > .in -8 > .SS bridge mdb delete - delete a multicast group database entry > This command removes an existing mdb entry. Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
diff --git a/man/man8/bridge.8 b/man/man8/bridge.8 index 9753ce9e92b4..4006ad23ea74 100644 --- a/man/man8/bridge.8 +++ b/man/man8/bridge.8 @@ -1013,6 +1013,12 @@ device creation will be used. device name of the outgoing interface for the VXLAN device to reach the remote VXLAN tunnel endpoint. +.in -8 +The 0.0.0.0 and :: MDB entries are special catchall entries used to flood IPv4 +and IPv6 unregistered multicast packets, respectively. Therefore, when these +entries are programmed, the catchall 00:00:00:00:00:00 FDB entry will only +flood broadcast, unknown unicast and link-local multicast. + .in -8 .SS bridge mdb delete - delete a multicast group database entry This command removes an existing mdb entry.
Document the catchall MDB entries used to transmit IPv4 and IPv6 unregistered multicast packets. In deployments where inter-subnet multicast forwarding is used, not all the VTEPs in a tenant domain are members in all the broadcast domains. It is therefore advantageous to transmit BULL (broadcast, unknown unicast and link-local multicast) and unregistered IP multicast traffic on different tunnels. If the same tunnel was used, a VTEP only interested in IP multicast traffic would also pull all the BULL traffic and drop it as it is not a member in the originating broadcast domain [1]. [1] https://datatracker.ietf.org/doc/html/draft-ietf-bess-evpn-irb-mcast#section-2.6 Signed-off-by: Ido Schimmel <idosch@nvidia.com> --- man/man8/bridge.8 | 6 ++++++ 1 file changed, 6 insertions(+)