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NE40E-M2 V800R010C10SPC500 Configuration Guide - WAN Access 01

This is NE40E-M2 V800R010C10SPC500 Configuration Guide - WAN Access
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Configuring Parameters for an ATM OC-3/STM-1 Interface or an ATM OC-12/STM-4 Interface

Configuring Parameters for an ATM OC-3/STM-1 Interface or an ATM OC-12/STM-4 Interface

This section describes how to configure parameters for an ATM OC-3/STM-1 or an ATM OC-12/STM-4 interface. Detailed operations include configuring the frame format and the scramble function for an ATM OC-3/STM-1 or an ATM OC-12/STM-4 interface.

Before You Start

Before configuring parameters for ATM interfaces, familiarize yourself with the usage scenario, complete the pre-configuration task, and obtain the required data. This can help you complete the configuration task quickly and accurately.

Usage Scenario

You can set these parameters according to the actual conditions of the ATM network so that these parameters can perfectly match the physical network.

The parameters of the ATM interface include the frame format, scramble function, loopback mode, and interval for traffic statistics collection. All these parameters have default configurations.

However, ATM sub-interface parameters, such as the frame format, scramble function, and loopback mode, cannot be configured. If those parameters are configured on the ATM main interface, the sub-interface inherits the parameters automatically.

The configured interval for traffic statistics collection on the ATM main interface cannot be inherited by the sub-interface, and it needs to be configured on the sub-interface.

These parameters must be configured on an ATM interface that needs to be encapsulated with an upper layer protocol.

Pre-configuration Tasks

Before configuring an ATM interface, power on and start the Router normally.

Data Preparation

To configure an ATM interface, you need the following data.

No.

Data

1

Number of the ATM interface

Configuring the Frame Format on an Interface

ATM interfaces complying with different standards need to be configured with different frame formats.

Context

Perform the following steps on the Router:

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run slot slot-id

    The slot view is displayed.

  3. Run frame-format { sdh |sonet card cardid }

    The frame format is configured.

    For an ATM STM-1 optical interface, the frame format is SDH; for an ATM OC-3 interface, the frame format is SONET.

    By default, the SDH frame format is used.

Configuring the Overhead Byte on an Interface

You can configure different overhead bytes for interfaces to implement hierarchical monitoring functions.

Context

The Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) provides various overhead bytes to implement hierarchical monitoring functions.

The signal label byte C2, a type of high-order path overhead byte, is used to specify the multiplexing structure and attribute of the information payload in a VC frame.

The regenerator trace byte J0, a type of section overhead byte, is used to detect the continuity of connection between two interfaces on the section.

The path trace byte J1, a type of high-order VC-N path trace byte, is used to detect whether the two interfaces are in the continuous connection status.

Perform the following steps on the Router:

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface atm interface-number

    The ATM interface view is displayed.

  3. Perform either of the following configurations as required:

    • Run flag j0 { 16byte-mode j0-value | peer }

      The regenerator trace byte J0 is configured.

    • Run flag j1 { 64byte-mode j1-value | 16byte-mode j1-value | peer }

      The path trace byte J1 is configured.

    • Run flag c2 c2-value

      The signal label byte C2 is configured.

    The C2, J0, and J1 bytes on the receiving and sending ends must be consistent. Otherwise, an alarm is generated.

    For the ATM interface, the default value of C2 is 19 (13 in hexadecimal notation). The default value of J0 and J1 is NetEngine.

Configuring the MTU of an Interface

Configuring a proper MTU for an ATM interface effectively improves efficiency of assembly and fragmentation of IP packets on the interface.

Context

The MTU of the ATM interface is used for the assembly and fragmentation of IP packets.

After running the mtu command on an interface, restart the interface to validate the MTU configuration by running the shutdown and undo shutdown commands.

Perform the following steps on the Router:

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface atm interface-number

    The ATM interface view is displayed.

  3. Run mtu mtu

    The MTU of the ATM interface is configured.

    The default MTU is 1500 bytes.

  4. Run shutdown

    The ATM interface is shut down.

  5. Run undo shutdown

    The ATM interface is started.

    After changing the MTU by using the mtu command on a specified interface, restart the interface to validate the newly configured MTU value.

Configuring the Scrambling Function on an Interface

Configuring the scrambling function effectively prevents consecutive 0s or 1s in ATM cells.

Context

The scrambling function can effectively prevent continuous 0s or 1s in ATM cells.

Configurations of the scrambling function on the local and remote interfaces must be consistent.

Perform the following steps on the Router:

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface atm interface-number

    The ATM interface view is displayed.

  3. Run scramble

    The scrambling function is configured.

    This scrambling function is enabled by default. This function is valid only for payloads and does not affect cell headers.

Configuring an Interval at Which Traffic Statistics Are Collected

This section describes how to configure an interval at which traffic statistics are collected on an ATM interface or on an ATM sub-interface. Note that the interval must be a multiple of 10.

Context

NOTE:

The NE40E supports traffic statistics collection on the ATM interface and sub-interface. Before configuring the interval at which traffic statistics are collected, configure the PVC for the interface and the sub-interface so that the configured statistics interval can be applied to the PVC.

Perform the following steps on the Router:

Procedure

  1. Run system-view

    The system view is displayed.

  2. Perform either of the following configurations as required:

    • Run interface atm interface-number

      The ATM interface view is displayed.

    • Run interface atm interface-number.subinterface-number

      The ATM sub-interface view is displayed.

  3. Run set flow-stat interval interval

    An interval at which traffic statistics are collected is configured.

    By default, traffic statistics are collected at an interval of 300s.

    The interval value must be a multiple of 10.

Verifying the ATM Interface Parameter Configuration

After configuring parameters on an ATM interface, verify the configuration, such as the frame format and MTU of the interface.

Procedure

  • Run the display interface atm [ interface-number [.subinterface-number] ] command to check the configuration and status of the ATM interface.
  • Run the display interface brief command to check brief information about the ATM interface.

Example

Run the display interface atm command. The command output shows the ATM interface configurations, including the scrambling function, frame format, clock mode, and interval at which traffic statistics are collected.

<HUAWEI> display interface atm 1/0/0
Atm1/0/0 current state : UP
Line protocol current state : UP
Last line protocol up time: 2008-11-03, 17:24:24 
Description : Atm1/0/0 Interface
Route Port, The Maximum Transmit Unit is 1500
Internet protocol processing : disabled
AAL enabled: AAL5, Maximum VCs: 2048
VCs on main-interface: 1 (Total VCs: 1)
VPs on main-interface: 0 (Total VPs: 1 )
The Vendor Name is FINISAR CORP.   , The Vendor PN is FTRJ1321P1BTL
Transceiver BW: 2.5G, Transceiver Mode: Single Mode
WaveLength: 1310nm, Transmission Distance: 5km
Rx Optical Power: -24.95dBm, Tx Optical Power: -1.99dBm
Physical layer is Packet Over SDH
UBR: 1, CBR: 0, VBR: 0,  USED BandWidth: 0Kbps
VPI Max: 255,  VCI Max: 2047
Scramble enabled, clock master, CRC-32, loopback: none
Flag: J0 "NetEngine       "
Flag: J1 "NetEngine       "
Flag: C2 19(0x13)
    SDH alarm:
        section layer:  OOF  LOF  LOS
        line layer:  AIS
        path layer:  AIS  RDI
    SDH error:
        section layer:  B1: 24
        line layer:  B2: 0   M1: 0
        path layer:  B3: 0   G1: 0
Statistics last cleared:never
    Send good cell: 0 cells
    Send idle cell: 25099462530 cells
    Receive idle cell: 0 cells
    Receive corrected cell: 0
    Receive uncorrected cell: 97
    Dropped receive cell: 0 cells
    Last dropped receive cell connection: 0/0
Last 30 seconds input rate: 0 bits/sec, 0 Packets/sec
Last 30 seconds output rate: 0 bits/sec, 0 Packets/sec
    Input: 0 Bytes, 0 Packets
    Output: 0 Bytes, 0 Packets

Run the display interface brief command. The command output shows brief information about the ATM interface, including the interface's physical status, link layer protocol status, bandwidth usage, and error packet statistics.

<HUAWEI> display interface brief | include 1/0/
PHY: Physical
*down: administratively down
^down: standby
(l): loopback
(s): spoofing
(b): BFD down
(e): EFM down
(d): Dampening Suppressed
InUti/OutUti: input utility/output utility
Interface                   PHY       Protocol   InUti   OutUti     inErrors  outErrors
Atm1/0/1                    up         up        0.08%   0.08%         0             0 
Atm1/0/1.1                  up         up        0.03%   0.03%         0             0 
Atm1/0/1.2                  up         up        0.03%   0.03%         0             0
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Updated: 2019-01-02

Document ID: EDOC1100058399

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