Tuesday, May 16, 2017

How to Modify the Size of Data Storage in Environmental Monitoring Database?

Issue Description
Q:
The data storage in the environmental monitoring database is generally defaulted as 500 thousand records. If the data is exceeded, the earliest data will be deleted. However, when managed network elements are rather many, 500 thousand records are only equivalent to the data in one to two days. When more data is needed to be saved, how to modify?
Alarm Information
Null
Handling Process
A:
1.Open the file \n2000\server\conf\main\enpowerdm\enpowerdm.cfg;
Find # to save the maximal historical data
SaveHisDataMax = 500000
Change 500000 to the data required, such as 2000000, and save the file.
What needs to be noted is that it is not recommended to use large data, which may take enormous data space.
If the saved data exceeds 10 million strips, it may result in the abnormity of environmental database.
2.Open the NM sysmonitor, find the background of environmental monitoring, and close the background of environmental monitoring.
3.Restart the background of environmental monitoring.
Root Cause
Nul
Suggestions

The environmental monitoring database mainly saves some changing data of environment parameters. Generally, the data is not required to be saved in large quantity. The environment alarm can be queried by querying the alarm database for failure history

Telephone: 852-30623083
           Supports@Thunder-link.com            
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Principle of Security Data Plan on Huawei MA5800

The security plan involves system security plan, user security plan, and service security plan.
Security policy ensures service security from different aspects.

The device provides complete security measures, but not all security measures need to be deployed. Only the security measures that meet the following requirements need to be deployed:

  • The security measures can be used on the live network.
  • The security measures are easy to deploy.
  • The security measures are effective.
  • Different ONUs support different security features. Select the security feature recommended in this topic according to actual Huawei ONU/ONT capabilities.
System Security

Security Vulnerability: DoS attack
Solution: Enable the anti-DoS-attack function Huawei OLT and MDU.
Description and Usage Suggestion:After the anti-DoS-attack function is enabled, control packets are
monitored and those exceeding the number threshold are discarded. Use this solution for new site deployment.

Security Vulnerability: IP attack
Solution: Enable the anti-IP-attack function Huawei OLT and MDU.
After the anti-IP-attack function is enabled, a device discards the IP packets received from the user side whose destination IP address is the IP address of the device, and therefore the system is protected. Use this solution for new site deployment.

User Security
MAC spoofing
Enable the anti-MAC duplicate function for Huawei MA5800 and MDU.
After anti-MAC-duplicate is enabled, the system records the first MAC address learnt from the port
and binds the MAC address to the port and VLAN. If receiving packets sent from the host that has the same MAC address with the port, the system discards the packets directly. In this case, it can prevent users from forging MAC addresses to perform malicious attacks. Use this solution for new site deployment.

MAC attack
Enable the anti-MAC spoofing function Huawei OLT and MDU.
After anti-MAC spoofing is enabled, the system can prevent users from forging IP addresses to perform malicious attacks. Use this solution for new site deployment.

IP spoofing
Enable the anti-IP spoofing function for MDU.
After anti-IP spoofing is enabled, the system can prevent users from forging IP addresses to perform
malicious attacks. Use this solution for new site deployment.


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Sunday, May 14, 2017

Basic Principles and Planning NE IDs of Planning the DCN

When constructing the DCN, select proper communication protocols according to the actual
networking situation, and follow the planning principles.
The principles for planning the DCN are as follows:

  • When Huawei OptiX OSN 2500 constructs a network with other Huawei equipment, the HWECC or IP over DCC protocol is recommended. Use the same communication protocol in the entire DCN network.
  • When the OptiX OSN 2500 constructs a hybrid network with equipment from other vendors, use the IP over DCC or OSI over DCC protocol according to the protocol supported by the equipment from other vendors.
  • The OptiX OSN 2500 constructs a hybrid network with equipment from other vendors. In this case, if the equipment from other vendors do not support the IP over DCC or OSI over DCC, use the DCC bytes or the Ethernet service channels to transparently transmit the management information.
  • When a communication protocol is used to construct the DCN network, properly set the DCN network scale and divide the network according to the network situation. Thus, the effect of large network scale on the DCN network can be reduced.
  • The DCN network should be of the ring type to ensure the reliability of the network communication. Thus, route protection can be provided when fiber cuts or NE abnormalities occur. If fibers of the equipment cannot form a ring, extra DCN channels should be constructed to form a ring, and thus the route protection function can be realized.
NE IDs are used to identify Huawei transmission equipment. Thus, the NE IDs should be
configured when the DCN network uses the HWECC, IP over DCC, and OSI over DCC
protocols.

The principles for planning the NE IDs are as follows:
  • The ID of each NE should be unique.
  • In the same DCN network, the ID of each NE should be unique.
  • An NE ID is 24 bits in binary, which can be divided into the former eight bits and the latter 16 bits.
– The former eight bits indicate the extended ID (the default value is 9), also called the subnet number, which identifies different subnets. The subnet number cannot be 0 or 0xFF (255 in decimal).
    – The latter 16 bits indicate the basic ID. The value of the basic ID cannot be 0 or 0xBFF0(49136 in decimal), or be greater than 0xBFF0.

    In the ring network, the NE IDs should be increased one by one in the same direction along
    the ring network.

    A complex network should be divided into rings and chains. First set IDs for NEs on the
    ring from 1 to N, and then set the IDs for NEs on the chain as N+1, N+2,…




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    Thursday, May 11, 2017

    How to Modify the Size of Data Storage in Environmental Monitoring Database?

    Issue Description
    Q:
    The data storage in the environmental monitoring database is generally defaulted as 500 thousand records. If the data is exceeded, the earliest data will be deleted. However, when managed network elements are rather many, 500 thousand records are only equivalent to the data in one to two days. When more data is needed to be saved, how to modify?
    Alarm Information
    Null
    Handling Process
    A:
    1.Open the file \n2000\server\conf\main\enpowerdm\enpowerdm.cfg;
    Find # to save the maximal historical data
    SaveHisDataMax = 500000
    Change 500000 to the data required, such as 2000000, and save the file.
    What needs to be noted is that it is not recommended to use large data, which may take enormous data space.
    If the saved data exceeds 10 million strips, it may result in the abnormity of environmental database.
    2.Open the NM sysmonitor, find the background of environmental monitoring, and close the background of environmental monitoring.
    3.Restart the background of environmental monitoring.
    Root Cause
    Nul
    Suggestions

    The environmental monitoring database mainly saves some changing data of environment parameters. Generally, the data is not required to be saved in large quantity. The environment alarm can be queried by querying the alarm database for failure history.

    Telephone: 852-30623083
               Supports@Thunder-link.com            
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    Wednesday, May 10, 2017

    QoS Planning Principles

    QoS plan for FTTB is in E2E mode, and it can be divided into following policies: traffic
    classification, marking, scheduling, traffic monitoring, and DBA policies.

    Traffic Monitoring and DBA Policies

    T-CONT (used only in GPON networks):Use different T-CONTs for different services.
    DBA type: Select a DBA type based on service types. For example, select Type1 for
    the management and voice services, and Type3 or Type4 for the Internet access and IPTV services.
    DBA bandwidth planning: Configure the DBA bandwidth according to the user's bandwidth
    package. The assured bandwidth is the maximum bandwidth required by management packets, VoIP, and IPTV upstream packets. The maximum bandwidth is greater than or equal to the maximum bandwidth that users apply.
    Rate limit on ONU uplink port: Set ONU port rate limit or Huawei xDSL line rate limit as required.
    Rate limit on ONU downlink port: Set ONU port rate limit or xDSL line rate limit as required.

    VoIP service: The upstream bandwidth and the downstream bandwidth of VoIP service are
    symmetrical. The actual bandwidth varies with the coding format. This bandwidth is calculated for two POTS ports.

    IPTV service (common program): IPTV service mainly occupies the downstream bandwidth. The actual bandwidth depends on the coding format, the picture in picture information, 10% bandwidth burst traffic, and the number of programs that can be concurrently watched by one user (in the case of multi STBs access). The upstream bandwidth is mainly used for transmitting IGMP packets, which
    requires little bandwidth and can be neglected.

    Rate limit on the BRAS or SR is recommended. Huawei OLT and ONU do not limit rates on
    service flows. If the BRAS does not support rate limit, OLTs can limit rates on service
    flows using traffic profiles.

    l The sum of assured bandwidth of all ONTs under a PON port and the fixed bandwidth of
    OMCI management channel must be smaller than Huawei GPON upstream bandwidth. Some
    bandwidth must be reserved for future service expansion.


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    Tuesday, May 9, 2017

    Configuring FTTH Service (P2P Access)

    Users connected to the OLT through an ONT, and are therefore provided with the Internet,
    VoIP, and IPTV service through a same port.

    Service Requirements

    • ONT_1 and ONT_2 are provided with the triple play service through Huawei FTTH.
    • The Internet access service is provided in the PPPoE access mode.
    • The IPTV user connected to ONT_1 can watch all the programs, and the IPTV user connected to ONT_2 can watch only program BTV-1.
    • The VoIP service and the IPTV service are provided in the DHCP mode and obtain IP, addresses from the DHCP server in the DHCP option-60 mode.
    • After receiving different traffic streams, the OLT provides different QoS guarantees to the traffic streams according to the priorities of the traffic streams.
    • Traffic streams are differentiated on the OLT by the user-side VLAN (C-VLAN).

    Example network of the optical fiber access service in the single-port for multiple
    services mode
    Prerequisite
    • Huawei OLT is connected to the upper-layer devices such as the BRAS, multicast server, SoftX3000, and DHCP server.
    • The VLAN of the LAN switch port connected to the OLT is the same as the upstream VLAN of the OLT.
    Procedure
    Configure the Internet access service on the OLT.
    a. Create a VLAN and add an upstream port to the VLAN.
    The VLAN ID is 100, and the VLAN is a smart VLAN. The upstream port is 0/9/0.
    b. Configure a traffic profile.
    Because the VoIP, IPTV, and Internet access services are provided through the same
    port, you must set the 802.1p priority of each service. Generally, the priorities are in a descending order for the VoIP service, IPTV service, and Internet access service.
    In this example, set the traffic profile index to 7 and the priority of the Internet access service to 1.
    c. Configure a service port.
    Add a service port to the VLAN and use traffic profile 7. The user-side VLAN ID is 2.
    d. Configure queue scheduling.
    Use the 3PQ+5WRR queue scheduling. Queues 0-4 adopt the WRR mode, with the
    weights of 10, 10, 20, 20, and 40 respectively; queues 5-7 adopt the PQ mode.
    Configure the mapping between queues and 802.1p priorities. Priorities 0-7 map
    queues 0-7 respectively.
    e. Save the data.
    Configure the VoIP service on Huawei MA5600T.
    a. Create a VLAN and add an upstream port to the VLAN.
    The VLAN ID is 200, and the VLAN is a smart VLAN. The upstream port is0/9/0.
    b. Configure a traffic profile.
    The traffic profile index is 8, and the 802.1p priority of the VoIP service is 5.
    c. Configure a service port.
    Add a service port to the VLAN and use traffic profile 8. The user-side VLAN ID is 3.
    d. Configure the DHCP relay.
    The VoIP service and the IPTV service are provided in the DHCP mode. The DHCP
    option 60 domain is used to differentiate service types.
    The DHCP domain of the VoIP service is voice.
    The IP addresses of VoIP DHCP server group 1 are 20.1.1.2 and 20.1.1.3.
    The IP address of the Layer 3 interface of VLAN 200 is 10.1.1.1/24.
    The gateway IP address of the DHCP domain is 10.1.1.1/24.
    e. Save the data.
    Configure the IPTV service on the OLT.
    a. Create a VLAN and add an upstream port to the VLAN.
    The VLAN ID is 1000, and the VLAN is a smart VLAN. The upstream port is0/9/0.
    b. Configure a traffic profile.
    The traffic profile index is 9, and the 802.1p priority of the IPTV service is 4.
    c. Configure a service port.
    Add a service port to the VLAN and use traffic profile 9. The user-side VLAN ID is d. Configure the DHCP relay.
    The VoIP service and the IPTV service are provided in the DHCP mode. The DHCP
    option 60 domain is used to differentiate service types.
    The DHCP domain of the IPTV service is video.
    The IP addresses of IPTV DHCP server group 2 are 20.2.2.2 and 20.2.2.3.
    The IP address of the Layer 3 interface of VLAN 1000 is 10.2.2.1/24.
    The gateway IP address of the DHCP domain is 10.2.2.1/24.4.
    e. Create a multicast VLAN and select the IGMP mode.
    Select the IGMP proxy mode.
    f. Set the IGMP version.
    Set the IGMP version of the multicast VLAN to IGMP v3.
    g. Configure the program library.
    Configure the program names to BTV-1 and BTV-2, multicast IP addresses of the
    programs to 224.1.1.10 and 224.1.1.20, source IP address of the programs to
    10.10.10.10, and priority to 4.
    h. Configure the right profile.
    Configure the profile name to profile0, with the right of watching program BTV-1.
    i. Configure the multicast users.
    Add service ports 200 and 300 as multicast users.
    j. Save the data.

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    How to Set the Memory Size of the SQL Server to Improve the Server Performance？

    Issue Description
    Q:
    How to set the memory size of the SQL database to improve the server performance?
    Alarm Information
    Null
    Handling Process
    A:
    1. Choose Procedure>Microsoft SQL Server>Enterprise Manager in the Start menu.
    2. The SQL Server Enterprise Manager window is displayed.
    3. Select current computer under SQL Server Group, right-click and select Property, and the SQL Server Property dialog box is displayed. Click Memory, click Use Fixed Memory Size (MB), drag the glide bar and select certain memory size. The advised values are shown in the following table (instruction part). Click OK to complete the configuration of memory use. After the configuration is complete, it is required to restart the database server to make the modification effective.
    Memory Size of Current Computer (MB)   Fixed Memory Size Allocated to Database (MB)
    256                                     40
    512                                     80
    1024                                 160
    ...............
    The rest is on the analogy of this.
    Root Cause
    Null
    Suggestions

    This method is applicable to the NM server with poor hardware performance. If the server has good performance, no modification is necessary.
    Telephone: 852-30623083
               Supports@Thunder-link.com            
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