docs/doc/source/_includes/bootstrapping-and-deploying-starlingx.rest
Ron Stone f125a8b892 Remove spurious escapes (r8,dsR8)
This change addresses a long-standing issue in rST documentation imported from XML.
That import process added backslash escapes in front of various characters. The three
most common being '(', ')', and '_'.
These instances are removed.

Signed-off-by: Ron Stone <ronald.stone@windriver.com>
Change-Id: Id43a9337ffcd505ccbdf072d7b29afdb5d2c997e
2023-03-01 11:19:04 +00:00

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.. note::
Controller-0 and controller-1 use IP multicast messaging for
synchronization. If loss of synchronization occurs a few minutes after
controller-1 becomes available, ensure that the switches and other devices
on the management and infrastructure networks are configured with
appropriate settings.
In particular, if |IGMP| snooping is enabled on |ToR| switches, then a
device acting as an |IGMP| querier is required on the network (on the same
|VLAN|) to prevent nodes from being dropped from the multicast group. The
|IGMP| querier periodically sends |IGMP| queries to all nodes on the
network, and each node sends an |IGMP| join or report in response. Without
an |IGMP| querier, the nodes do not periodically send |IGMP| join messages
after the initial join sent when the link first goes up, and they are
eventually dropped from the multicast group.