diff options
| author | Anuradha Karuppiah <anuradhak@cumulusnetworks.com> | 2020-08-05 07:13:55 -0700 |
|---|---|---|
| committer | Anuradha Karuppiah <anuradhak@nvidia.com> | 2021-02-24 08:09:33 -0800 |
| commit | 00a7710c25aae45874622d69f5cea6ea6dff0a47 (patch) | |
| tree | d1b9a2da2145940078aa044abeb157860c7aeacc /zebra/interface.c | |
| parent | 0ff791138668c50a1c60b209333091682d8926d3 (diff) | |
zebra: support for lacp bypass with EVPN MH
Feature overview:
=================
A 802.3ad bond can be setup to allow lacp-bypass. This is done to enable
servers to pxe boot without a LACP license i.e. allows the bond to go oper
up (with a single link) without LACP converging.
If an ES-bond is oper-up in an "LACP-bypass" state MH treats it as a non-ES
bond. This involves the following special handling -
1. If the bond is in a bypass-state the associated ES is placed in a
bypass state.
2. If an ES is in a bypass state -
a. DF election is disabled (i.e. assumed DF)
b. SPH filter is not installed.
3. MACs learnt via the host bond are advertised with a zero ESI.
When the ES moves out of "bypass" the MACs are moved from a zero-ESI to
the correct non-zero id. This is treated as a local station move.
Implementation:
===============
When (a) an ES is detached from a hostbond or (b) an ES-bond goes into
LACP bypass zebra deletes all the local macs (with that ES as destination)
in the kernel and its local db. BGP re-sends any imported MAC-IP routes
that may exist with this ES destination as remote routes i.e. zebra can
end up programming a MAC that was perviously local as remote pointing
to a VTEP-ECMP group.
When an ES is attached to a hostbond or an ES-bond goes
LACP-up (out of bypss) zebra again deletes all the local macs in the
kernel and its local db. At this point BGP resends any imported MAC-IP
routes that may exist with this ES destination as sync routes i.e.
zebra can end up programming a MAC that was perviously remote
as local pointing to an access port.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
Diffstat (limited to 'zebra/interface.c')
| -rw-r--r-- | zebra/interface.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/zebra/interface.c b/zebra/interface.c index f74030e4d8..aeaf794fa2 100644 --- a/zebra/interface.c +++ b/zebra/interface.c @@ -1604,6 +1604,9 @@ static void if_dump_vty(struct vty *vty, struct interface *ifp) } } + if (zebra_if->flags & ZIF_FLAG_LACP_BYPASS) + vty_out(vty, " LACP bypass: on\n"); + zebra_evpn_if_es_print(vty, zebra_if); vty_out(vty, " protodown: %s %s\n", (zebra_if->flags & ZIF_FLAG_PROTODOWN) ? "on" : "off", |