What is the Power Distribution Principle of MA5608T?

Huawei Small-size MA5608T chassis adopts AC and DC power supply. This topic describes the power distribution principle of the MA5608T chassis.

The MA5608T chassis adopts -48 V (-38.4 V to -57.6 V)/-60 V (-38.4 V to -72 V) DC power supply and AC power supply. The following uses the -48 V DC as an example.

Figure 1 Power distribution principle of the MA5608T chassis 

The Huawei MPWC DC power interface board leads two -48 V input to the backplane, and then the backplane supplies power to each board.

The MPWC boards supports two -48 V DC input. If one input is off, the other supplies power to the chassis can guarantee normal running of the system.

The Huawei MA5608T MPWD AC power interface board supports the AC input. After AC/DC conversion, the power is supplied to the system backplane at -48 V DC.

Two MPWE boards can be configured for dual-system hot backup. Each MPWC board supports one -48 V DC input. If one MPWE board is off, the other supplies power to the chassis can guarantee normal running of the system.

What are the differences in the processing mechanism of the ring check function between earlier-version and later-version MA5600T?

We plan to buy Huawei OLT, What are the differences in the processing mechanism of the ring check function between earlier-version and later-version MA5600T?

• The processing mechanism of the ring check function of an earlier-version MA5600T has the following disadvantages:

1,After a loop is detected, the MA5600T deactivates the ONT. In this way, live-network configurations are modified.

After the ONT is deactivated, you need to manually activate the ONT (that is, re-configure services). This increases the workload.

• The processing mechanism of the ring check function of MA5600T V800R009 (or later versions) is optimized in terms of the following aspects:

1, After a loop is detected, the MA5600T makes the ONT go offline. In this way, live-network configurations are not modified but the ONT is stopped from transmitting services.

2, Huawei MA5600T automatically makes the offline ONT go online after a period of time elapses. Note that 3, the length of this period of time is configurable.

3, An easy-to-use query function is provided. With this function, you can query all ONTs that go offline because of loops.

• If you need to query all ONT deactivation records, run the display event history eventid command to query the information about events 0x2910000d and 0x29100026.

How to check the telephone port on 8245Q2 is normal?

1, Configure the IP address of the PC in the same subnet as the local maintenance IP address of ONT  8245Q2 Ensure that the PC can ping 192.168.100.1.

2, Access 192.168.100.1 remotely from the PC and input the username and password root/admin. The wap> is displayed, which indicates that the login succeeds.

3, Input vspa voiptest switch enable in the wap> command to enable the mutual dialing function.

4, Assume that two telephones are connected to port tel1 and port tel2. The telephone numbers are 0 and 1 respectively (the rest may be reduced by analogy if there are many telephone numbers). Hook off telephone tel1 and dial 1 to call telephone tel2. If telephone tel2 rings, and telephone tel2 can communicate with telephone tel1 after offhook, it indicates that the telephone ports of ONT function normally. Then use telephone tel2 to call telephone tel1. If  the GPON ONT has only one telephone port, hook off the telephone and dial 0 after the mutual dialing function is enabled. Speak to the speaker and if echoes can be heard in the earphone, it indicates that the dialing function is normal.

What should we pay attention to when use Huawei 40G OTN line board

The TN54NS3/TN55NS3 board for the OptiX OSN 6800/OptiX OSN 8800 universal platform subrack only supports relay mode. TN56NS3 board for the OptiX OSN 8800 universal platform subrack only supports relay mode.

When the TN56NS3 board is used to receive SDH services, the SDH service license for universal line boards is required.

When the TN56NS3 board is installed in a general OptiX OSN 8800 T64 subrack, the XCT+SXH or XCT+SXM cross-connect boards must be used. When the TN56NS3 board is installed in an enhanced OptiX OSN 8800 T64 subrack, the XCT+SXH, XCT+SXM, or UXCT+USXH cross-connect boards must be used. When the TN56NS3 board is installed in an OptiX OSN 8800 T16 subrack to receive SDH services, the TN16UXCM cross-connect board must be used.

When SDH services are provisioned, the TN56NS3 board can be used only in an independent subrack, but not in a master or slave subrack. When OTN services are provisioned, the TN56NS3 board can be used in an independent subrack, a master subrack, or a slave subrack.

Does Huawei S3700&S5700&S6700 Switch Version Support DHCP Relay for VRRP?

Huawei S3700&S5700 V100R002 and V100R003 do not support DHCP relay for VRRP.
From S3700&S5700 V100R005 or S3700&S5700& S6700 like S6720-54C 48-ports SFP+ switch V100R006 and later versions, DHCP relay for VRRP can only be used in specified gateways of server groups.

If you want to know Huawei S5700 price, you can contact thunder-link.com.

Version Description of Huawe OTN Tributary Board TOX

TOX 8 x 10G tributary board is available in two functional versions, namely, TN55 and TN56. The mapping between the board and equipment as below:

When the TOX board is used in an enhanced OptiX OSN 8800 T64 subrack, the TNK2USXH and TNK2UXCT cross-connect boards must be configured.

When it is used in an enhanced or general OptiX OSN 8800 T32 subrack, the TN52UXCH or TN52UXCM cross-connect board must be configured.

When it is used in an OptiX OSN 8800 T16 subrack, the TN16UXCM cross-connect board must be configured.

Variants

The TN55TOX/TN56TOX board has only one variant: TN55TOX01/TN56TOX01.

Differences Between Versions

Can we know MAC address table feature on Huawei 40G S6720-30C-EI-24S-AC Switch

We have a Huawei 40G QSFP+ switch S6720-30C-EI-24S-AC in our data center, do you know its MAC address table features?

1, 288K MAC address entries

2, MAC address learning and aging

3, Static, dynamic, and blackhole MAC address entries

4, Packet filtering based on source MAC addresses

What is the GE port specification on Huawei HG 8245Q2?

Specifications of a Gigabit Ethernet (GE) ports on ONT HG 8245Q2?

Connector type: RJ-45
Port rate: 10 Mbit/s, 100 Mbit/s, or 1000 Mbit/s
Maximum transmission distance:100 m
Working mode: Auto-adaptive 10 Mbit/s, 100 Mbit/s or 1000 Mbit/s
Cable specifications: Category 5 UTP
Huawei 2.5G/5G Wifi 8245Q2 Compliant standard: 
IEEE 802.3i

IEEE 802.3u

IEEE 802.3ab

Can an STA automatically switch to an access point with stronger signal strength in a smart Wi-Fi coverage network?

• For an STA that has the capability of roaming aggressiveness, it automatically compares the signal strength among detected access points and switches to an access point with stronger signal strength.
• For an STA that does not have the capability of roaming aggressiveness, if the ONT finds that the signal strength of the Wi-Fi device is poor, Huawei GPON ONT 8245Q2 disconnects the Wi-Fi device from its current access point and the Wi-Fi device has to look for an access point with stronger signal strength.

The action of Wi-Fi roaming and switching is mainly dependent to the user's Wi-Fi terminal. Some Wi-Fi terminals will continuously attempt to connect to the access point from which they had been disconnected rather than looking for an access point with stronger signal strength. For these Wi-Fi terminals, contact the vendor to resolve the roaming and switching issues.

What is the Application Scenarios of Huawei S7700 Switch?

Application of the S7700 on a Large-scale Enterprise Campus Network

This section describes the application of the S7700 on a large-scale enterprise campus network.

As shown in Figure 1, Great value S7700 campus Switch is deployed at the aggregation layer of a large-scale campus network, helping you built a highly reliable, scalable, and manageable enterprise campus network.

Figure 1 Position of the S7700 on a large-scale enterprise campus network 

The S7700 uses distributed forwarding architecture, 480 Gbit/s slot bandwidth, 24 40G ports to build a high performance service platform, supporting long-term enterprise service development.

The S7700 provides innovative cluster switching system (CSS) to reduce data forwarding latency, improve IT network efficiency, and enhance enterprises' competitiveness.

The S7700 supports hardware-based Ethernet OAM/BFD and hardware CPU queues to make network more reliable and secure.

Application of the S7700 on a Small- or Medium-scale Enterprise Campus Network

This section describes the application of the S7700 on a small- or medium-scale enterprise campus network.

As shown in Figure 1, the S7700 can function as a core device on a small- or medium-scale enterprise campus network. It provides a cost-effective, reliable, and easy-to-deploy network solution for a small- or medium-scale enterprise campus network.

Figure 1 Position of the S7700 on a small- or medium-scale enterprise campus network 

The S7700 provides innovative cluster switching system (CSS) to reduce data forwarding latency, improve IT network efficiency, and enhance enterprises' competitiveness.

The S7700 uses high-reliability technologies such as hardware-based Ethernet OAM and BFD to ensure service continuity.

The S7700 is 480 high-density 10GE ports switch and uses compact chassis and left-to-rear air channels to increase cabling capability, reduce switch size, and reduce power consumption.

Can 4*GE and 4*10GE Front Subcards of the S5700-EI and S5700-SI Switches Be Used Without an Extended Rear Subcard?

Can 4*GE and 4*10GE Front Subcards of the S5700-EI and S5700-SI Switches Be Used Without an Extended Rear Subcard?

When a 4*GE or 4*10GE front subcard is used without an extended rear subcard, only two of
the four ports on the subcard can be used:
4*GE subcard: Only the first and second ports can be initialized. The ports are displayed
as GigabitEthernet */1/1 and GigabitEthernet */1/2 after initialization.
4*10GE subcard: Only the first and third ports can be initialized. The ports are displayed
as XGigabitEthernet */1/1 and XGigabitEthernet */1/2 after initialization.

Indicates the slot ID of the switch.

What's new in MA5600T V800R016C10 compared with previous versions?

Feature Updates

Hardware Updates

H802MABH: Huawei MA5600T A 19-inch backplane supporting VDSL vectoring. It is supported since V800R016C00 and later. If you want to know Huawei VDSL board price, you can contact Thunder Link International sales.

Do you know Huawei OTN Line Protection?

Introduction

Optical line protection protects line fibers between adjacent stations using the dual fed and selective receiving function of Huawei OLP boards.

The optical line protection is the 1+1 OMS trail protection that is defined in ITU-T G.872 and ITU-T G.798. The product also supports the 1+1 OTS trail protection.

Table 1 1+1 OTS trail protection, 1+1 OMS trail protection, and 1+1 Multi-OTS trail protection

Protection scheme	Bidirectional switching or unidirectional switching	APS protocol	Application example
1+1 OTS trail protection	Unidirectional switching	Not Support	Figure 1
	Bidirectional switching	Support	Figure 2
1+1 OMS Trail Protection and 1+1 Multi-OTS Trail Protection	Unidirectional switching	Not Support	Figure 3
	Bidirectional switching	Support

Optical Line Protection (1+1 OTS Trail Protection)

As shown in Figure 1 and Figure 2, diverse routes are used to protect a signal against a line fiber fault.

• Figure 1 shows an example of unidirectional switching.
• Figure 2 shows an example of bidirectional switching. In the figure, site B is an OLA site, and there are two OTS sections. Hence, two independent optical line protection groups must be configured. If there is no OLA site between sites A and C, only one optical line protection group is required.

Figure 1 Optical line protection (1+1 OTS trail protection, unidirectional switching) 

 NOTE:

This protection scheme cannot apply to a scenario where the protected service traverses an OLA site. If it is configured for such a scenario, DCN communication between sites may fail.

If SFIU boards are used in the example shown in Figure 1, the TN12OLP04/TN12OLP07 boards must be used to configure the optical line protection.

Figure 2 Optical line protection (1+1 OTS trail protection, bidirectional switching) Huawei SFIU boards do not apply to the scenario shown in Figure 2.

Optical Line Protection (1+1 OMS Trail Protection and 1+1 Multi-OTS Trail Protection)

As shown in Figure 3, when an optical amplifier, FIU board, or fiber fault is present, the system uses diverse routing to protect the signal.

When an OLA site is located between sites A and D, this scenario is defined as a 1+1 multi-OTS protection scenario. When an OTM, FOADM or ROADM site is located between sites A and D, this scenario is defined as a 1+1 OMS protection scenario.

Figure 3 Optical line protection (1+1 OMS Trail Protection and 1+1 Multi-OTS Trail Protection) 

Only TN12OLP03/TN12OLP06/TN13OLP03 can be used in this scenario.

Optical line protection (1+1 OMS Trail Protection and 1+1 Multi-OTS Trail Protection) configurations are the same in unidirectional and bidirectional switching applications.