Netgear XCM8903SF-10000S Datasheet download pdf (Page 3)

12. What type of redundancy modes for fabric and

management is available?

Only one: non-stop switching and hitless failover. M6100 series

“distributed fabric” provides both Fabric and Management redundancy

with non-stop switching and hitless failover. There is no fastidious

conﬁguration: Slot-1 is the Supervisor slot, and Slot-2 is the Back-up

Supervisor slot (secondary). By default, the Back-up Supervisor slot

(Slot-2) provides continuous stand-by mode within the distributed

fabric. In case of a failure for the Supervisory blade in Slot-1, the

Back-up Supervisor in Slot-2 is instantly taking over as the new

Supervisor. Non-stop forwarding feature oers hitless failover for

Slot-2 and Slot-3 switching and routing in that case.

13. What happens when Supervisory blade in Slot-1 gets

replaced aer removal?

When Supervisory blade in Slot-1 is removed, hitless failover auto-

matically happens and the Back-up blade in Slot-2 becomes the ‘new’

Supervisor. Now, when the blade in Slot-1 has been serviced and/

or replaced, nothing happens automatically, by design. The admin has

to issue a command in the CLI (movemanagement <2> <1>) or

perform a GUI conﬁguration (System > Chassis > Basic >

Chassis Conguration) in order to request reverse fail back to

Slot-1 as the new Supervisor slot. This provides more control to the

admin, while ensuring non-stop switching/routing and hitless fail back

mechanism for the entire fabric and management. Network trac isn’t

impacted by the fail back.

14. What type of redundancy modes for Power Supplies

is available?

N+1 redundancy is provided when one power supply is in standby

mode. There are four PSU slots in M6100-3S base chassis, so minimum

two power supplies are required for N+1 mode. Four additional PSU

slots can be added with RPS4000v2 external power supply bay. In that

case, N+1 mode is available across the eight uniﬁed PSU slots.

15. Is M6100 chassis switch backplane ‘passive’?

Yes, M6100 backplane meets Passive Backplane requirements.

16. What is M6100-3S chassis fabric speed?

M6100-3S distributed fabric speed is 480 Gbps inter-module. Each

slot provides 8 x 10G unidirectional access to the backplane (80G

half-duplex and 160G full-duplex per slot).

17. What is M6100-3S routing and switching capacity?

M6100-3S chassis total routing / switching capacity is 1.4 Tbps

intra-module. Each blade (line-card) provides local line-rate capacity.

18. What is M6100-3S total throughput?

M6100-3S chassis total throughput is 357 Mpps (Million packets

per second) inter-module and 1,071 Mpps intra-module.

19. What is M6100-3S chassis PoE budget?

Depending on the number of power supplies and the I/O blades

combination, M6100-3S chassis can provide up to 6,000W PoE

budget. For instance, all 144 ports (Max 1G capacity) can provide

each full PoE+ 30W per port or 41.5W UPOE power per port. Another

example, up to 99 ports can provide full UPOE 60W per port.

20. How can I equip a Gigabit blade for PoE?

XCM8948 blade (48 x 1G RJ45) and XCM8944 blade (40 x 1G RJ45,

2 x SFP+, 2 x 10GBASE-T) can be equipped with a PoE daughter card

for turning on PoE, PoE+ and/or UPOE on every Gigabit RJ45 ports

on the blade. It means than any blade XCM8948 or XCM8944 can be

upgraded with PoE at any point of time, and possibly downgraded if

the application has changed. This is much more ﬂexible than built-in

PoE line-cards for instance, and it provides great investment protection

in case of UPOE upgrade: only the daughter card would be upgraded,

not the blade – hence lowering the cost and removing the need for

re-conﬁguration. There are two dierent PoE daughter cards: XCM89P

for PoE+ and XCM89UP for UPOE. One daughter card per I/O blade

is required.

21. Which PoE standards are supported by XCM89P and

XCM89UP daughter cards?

XCM89P daughter card supports PoE (802.3af) and PoE+ (802.3at).

XCM89UP daughter card supports PoE (802.3af), PoE+ (802.3at)

and UPOE (Universal Power over Ethernet).

22. What is UPOE and what is supported exactly?

UPOE (Universal Power over Ethernet) is not an IEEE standard: UPOE was

brought to market by Cisco® but its physical and LLDP speciﬁcations have

been used by third-parties for interoperability, for instance via UPOE

LLDP TLV, an 802.3 organizationally specic TLV. To power a UPOE PD

device, all four pairs are used to deliver up to 30W + 30W = 60W per

RJ45 Gigabit port. More generally, UPOE can deliver any PSE wattage

up to 60W per port, when PoE+ is limited to 30W PSE maximum. When

a XCM8948 blade (48 x 1G RJ45) or XCM8944 blade (40 x 1G RJ45,

2 x SFP+, 2 x 10GBASE-T) is equipped with XCM89UP UPOE daughter

card, it is backward compatible with standard PoE (15.4W) and PoE+

(30W). This means that any standard PoE (802.3af) or PoE+ (802.3at)

PD device is powered without any speciﬁc conﬁguration. The NETGEAR

M6100 chassis supports UPOE next-generation PD devices using UPOE

LLDP TLV as the preferred method. M6100 chassis supports a second

method for UPOE interoperability called forced 4-pair high power static

method. A ‘PoE’ command must be issued in the CLI or the Web GUI to

enable the forced 4-pair conﬁguration. M6100 doesn’t support Cisco

CDP power negotiation mechanisms and algorithms for inline power

negotiation with UPOE PD devices.

“Cisco” is a registered trademark of Cisco Technology, Inc.

23. What is PV(R)STP new feature?

This is Per VLAN Spanning Tree and Per VLAN Rapid Spanning Tree.

There is no IEEE standard yet for Per VLAN (R)STP, but NETGEAR

implementation follows the same rules than other vendor’s Per VLAN

(R)STP for interoperability:

• Per VLAN STP is similar to IEEE 802.1d (spanning tree protocol),

but implemented per VLAN. A single instance of STP runs on each

VLAN and each STP instance on a VLAN has a single root switch.

FastUplink feature immediately moves an alternate port with lowest

cost to forwarding state when the root port goes down to reduce

the recovery time. It generates dummy SSTP frames to reduce

convergence time. FastBackbonefast feature selects new indirect

port when an indirect port fails.

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M6100 Chassis Switch 1

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Netgear XCM8903SF-10000S Datasheet Page 3

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