Calrec Hydra2, Руководство по установке

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CALREC
Putting Sound in the Picture
25
DUAL ROUTER CORE REDUNDANCY
Dual Router Core redundancy is an
option for 8U Router Core systems
(racks that do not contain a DSP
mix engine), to physically split the
location of the primary and secondary
cards, providing protection against
serious infrastructure problems,
such as complete loss of power to an
equipment bay/room, flooding or fire.
Systems that employ router cores normally
use them as centralized distribution points
within a wider Hydra2 network. Where
router cores are used, one of them is
normally dedicated as the Master Router
for the network—upon which all other
router and console cores are dependant.
Therefore, providing locational redundancy
for router cores in this way further secures
reliability across the network as a whole.
Cardlayoutandtypes
A dual core router comprises of 2 x 8U
racks—the “Core A” rack houses the
primary cards, and the “Core B” rack
houses the secondary cards. The primary
cards are fitted in the normal primary slots
of Core A. The secondary cards are fitted
in the normal secondary slots of Core
B. (The secondary slots in Core A, and
primary slots in Core B are inactive.)
Power supplies are an exception to this -
both racks are fitted with 2 x PSUs each
in order to maintain power redundancy to
both cores.
DSP cards cannot be fitted in a Dual
Router Core—racks providing a mixing
console DSP engine (an Apollo, Artemis
or Summa core) need to be housed in
a single enclosure, though they can be
connected to a Dual Router Core.
In addition to the standard cards -
Routers, Control Processors and PSUs,
a Redundant Core Link (RCL) card
is required in both Core A and Core
B - an RCL card should be fitted in the
secondary Control Processor slot of Core
A, and the primary Control Processor
slot of Core B. The RCL cards provide a
backup data link between the two cores.
All primary and secondary cards are
identical in hardware and run the same
software, allowing them to be freely
interchanged between linked cores.
Other than the RCL cards, all hardware
and software, and the rack enclosures/
backplanes themselves are the same as
are used in standard router cores and
Apollo/Artemis console cores.
Connectivity
I/O boxes and other router or console
processing cores connect as normal—I/O
port 1’s and primary routers from other
cores connect to the primary router
which is fitted in Core A. I/O secondary
ports and other cores’ secondary routers
connect to the secondary router which is
fitted in Core B.
Two additional connections are required to
provide a primary and secondary comms
link between Core A and Core B - the
MAC7 ports of the Core A and Core B
Control Processors should be connected
together to form the primary link, and the
single front panel port of the RCL cards in
Cores A and B should also be connected
together to form the secondary link
(see diagram overleaf for further clarity).
These are SFP ports, and therefore can
be RJ45 copper or various fiber formats.
Please refer to “SFP - Overview” on page
30 for further information on type and
specification.
Boot-upandconfiguration.
At boot-up, the Control Processors check
to see if they have an RCL card fitted in
their neighboring Control Processor slot,
or on their MAC7 port link. If either is true,
the system will boot in Dual Router Core
Redundancy mode. If both are false, it will
boot in standard redundancy mode.
As with a standard, self-contained rack,
both the primary and secondary Control
Processors have identical configuration
settings. The IP addresses assigned
to cards in both cores are in the same
range, and use the same IP allocation as a
standard core.
Sync
Both core A and core B need to be
connected and locked to a commonly
derived sync source, as is the case for
all router / console cores in any Hydra2
network.
From software version 1.12.1, the H2O
Manage Clients screen allows for router
cores to be configured as “Dual Router”.
Cores configured as Dual Routers will
display the sync status of both Core A
and Core B. Both operate on the same
sync priority list (I.E. Core A cannot be
given a different priority list of sync types
to that of Core B), however they can
independently switch and will therefore
lock independently depending on the sync
type being fed into each.
Two padlock icons are displayed for Dual
Router Cores within their H2O sync status
table to indicate the currently locked
source—the actively controlling router’s
icon is colored gold, the non-controlling
router is silver. Clicking “reset to first”
will cause both the core A and core B to
attempt to lock to the top entry in the list,
moving down until a viable source is found.
Resets
The reset buttons for both Core A and
Core B are independent of each other
and only reset the cards fitted within each
Core.