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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 ATM to Carry Upper-Layer Services

Configuring ATM to Carry Upper-Layer Services

If upper-layer services need to be transmitted over an ATM network, configure ATM to carry upper-layer services.

Before You Start

Before configuring ATM to carry upper-layer services, familiarize yourself with the usage scenario, complete the pre-configuration tasks, and obtain the data required for the configuration.

Usage Scenario

Before the Gigabit Ethernet technology was developed, ATM backbone switches were deployed on backbone networks to provide sufficient bandwidth. As ATM is well-developed, its complex architecture causes difficulties in ATM system development, configuration, management, and fault location. Therefore, ATM is often used at the data link layer currently to carry upper-layer protocol packets. ATM boasts of high-quality comprehensive service transmission, and therefore is considered as the best transport technology for Broadband Integrated Services Digital Networks (B-ISDNs).

IPoA means that IP packets are encapsulated in ATM cells and transmitted on ATM networks. As shown in Figure 12-1, ATM allows devices on the same network to communicate with each other at the data link layer by transmitting ATM cells in which IP packets have been encapsulated. As bearer networks for IP services, ATM networks provide good network performance and mature QoS assurance.
Figure 12-1 IPoA application networking

Pre-configuration Tasks

ATM interfaces on the device have been physically connected.

Data Preparation

To configure ATM to carry upper-layer services, you need the following data.

No.

Data

1

Number of each ATM interface or sub-interface, IP address and mask of each ATM interface or sub-interface, PVC name, VPI/VCI values, and AAL5 encapsulation type

2

(Optional)Minimum and maximum priorities of IP packets transmitted along PVCs

Configuring Basic PVC Functions

After a mapping between a Permanent Virtual Circuit (PVC) and a remote protocol address is configured, upper-layer protocol packets can be encapsulated in ATM cells and transmitted on ATM networks.

Context

Table 12-2 lists the relationships between PVC encapsulation types and upper-layer protocols.

Table 12-2 Relationships between PVC encapsulation types and upper-layer protocols
Upper-Layer Protocol/Encapsulation Type aal5snap aal5mux aal5nlpid aal5nlpidietf
IPoA Supported Supported (not supported if Inverse Address Resolution Protocol [InARP] is used) Supported (not supported if InARP is used) Supported (not supported if InARP is used)

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface atm interface-number[.subinterface ] [ p2mp | p2p ]

    The view of an ATM interface or sub-interface is displayed.

    NOTE:
    After you enter the view of an ATM interface or sub-interface, you can configure the following parameters:
    • To enable OAM on an ATM sub-interface, run the atm-link check command. If the PVC and PVP status of the ATM sub-interface goes Down, the protocol status on the sub-interface also goes Down.

    • To configure the maximum number of VCs on an ATM interface, run the pvc max-number command. If the number of PVCs configured on the ATM interface reach the maximum limit, no new PVC can be configured on the interface.

  3. Run pvc { pvc-name [ vpi/vci ] | vpi/vci }

    A PVC is created and the PVC view is displayed.

    NOTE:
    • The VCI values 3, 4 are reserved.
    • The VPI and VCI values cannot be both 0s.
    • The value of vpi/vci cannot be 255/65535.

  4. (Optional) Run description text

    The description is configured for the PVC.

  5. Run encapsulation { aal5snap | aal5mux | aal5nlpid | aal5nlpidietf }

    An AAL5 encapsulation type is configured for the PVC.

    The default AAL5 encapsulation type is aal5snap.

    Table 12-2 lists the relationships between PVC encapsulation types and upper-layer protocols.

  6. Run map ip { ip-address | inarp [ minutes ] } [ broadcast ]

    The IPoA mapping is configured on the PVC so that AAL5 carries IP packets.

    Running the map ip ip-address command configures a mapping between a PVC and a destination IP address. Every IP packet to be transmitted on an IPoA network must be mapped to a PVC, and therefore multiple mappings are required. To configure mappings in batches, perform the following operations as required:
    • To map all the IP packets destined for the same network segment to one PVC, run the map ip ip-address mask command.
    • If the local device is the DTE, run the map ip inarp [ minutes ] command to use InARP for automatic mapping. In this case, you do not need to configure mappings between IP addresses and PVCs.

      NOTE:

      minutes must be set to a proper value based on the network topology stability. If the network topology changes frequently, set a small minutes value. If the network topology is stable, set a large minutes value.

    If the upper-layer protocol, for example, OSPF, transmits packets in broadcast mode, configure broadcast for the PVC. If a PVC is configured with broadcast, all broadcast packets transmitted through the interface where the PVC resides will be copied to the PVC.

(Optional) Configuring the Priority of an ATM PVC

By setting priorities for ATM PVC traffic, you can schedule traffic on the PVCs with different priorities.

Context

Perform the following steps on the Router:

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface atm interface-number.sub-interface

    The ATM sub-interface view is displayed.

    NOTE:
    To configure the priorities of all PVCs in the interface view, you can run the service output priority command on the interface.

  3. Run pvc { pvc-name [ vpi/vci ] | vpi/vci }

    The PVC view is displayed.

  4. Run service output priority priority

    The priority of the PVC is specified.

    NOTE:

    You can use this command to configure priorities of UBR and UBR-plus type PVCs. Therefore, the system can schedule the traffic in the PVCs with different priorities.

Verifying the ATM Configuration

After configuring ATM to carry upper-layer services, verify the configuration and status of ATM interfaces or sub-interfaces, and information about Permanent Virtual Circuit (PVCs) and PVC mapping.

Prerequisites

ATM links have been configured to transmit different protocol packets.

Procedure

  • Run the display interface atm [ interface-number | main ] command to check the configurations and status of ATM interfaces or sub-interfaces.
  • Run the display atm pvc-info [ interface interface-type interface-number [ pvc { pvc-name [ vpi/vci ] | vpi/vci } ] ] command to check information about PVCs.
  • Run the display atm pvc-infostatistics [ interface interface-type interface-number ] command to check PVC traffic statistics.
  • Run the display atm map-info [ interface interface-type interface-number [ pvc { pvc-name | vpi/vci } * ] ] command to check information about PVC mapping.

Example

Run the display interface atm command to view ATM interface or sub-interface configurations.
<HUAWEI> display interface atm 0/1/0
Atm0/1/0 current state : UP (ifindex: 21319)                                    
Line protocol current state : DOWN                                              
Description:                                                                    
Route Port,The Maximum Transmit Unit is 1500                                    
Internet protocol processing : disabled                                         
VCs on main-interface: 0 (Total VCs: 5)                                         
VPs on main-interface: 0 (Total VPs: 0)                                         
Optical transceiver is offline!                                                 
Physical layer is Packet Over SDH                                               
UBR: 0, CBR: 0, VBR: 0,USED BandWidth: 0                                        
VPI Max: 255, VCI Max: 65535                                                          
Scramble enabled, clock master, CRC-32, loopback: local                         
Flag J0 "NetEngine       "                                                      
Flag J1 "NetEngine       "                                                      
Flag C2 19(0x13)                                                                
Last physical up time   : 2016-02-22 20:42:32                                   
Last physical down time : 2016-02-22 20:42:31                                   
Current system time: 2016-02-24 17:57:40                                          
  SDH alarm:                                                                                
       section layer:  none                                                    
       line    layer:  none                                                  
       path    layer:  none                                              
  SDH error:                                                                       
       section layer:  B1 0                                                  
       line    layer:  B2 0  M1 0                                               
       path    layer:  B3 3  G1 0                                      
Statistics last cleared:0000-00-00 00:00:00                                       
  Send correct cell: 0 cells                                                    
  Send idle cell: 0 cells                                                       
  Receive correct cell: 0 cells                                                 
  Receive idle cell: 0 cells                                                    
  Receive corrected cell: 0  cells                                              
  Receive uncorrected cell: 0  cells                                            
  Dropped receive cell: 0 cells                                                 
  Last dropped receive cell connection: 0/0                                     
  Last 300 seconds input rate: 0 bits/sec                                       
  Last 300 seconds output rate: 0 bits/sec                                      
  Input: 0 bytes                                                                
  Output: 0 bytes                                                               
  Last 300 seconds input utility rate:  0.00%                                    
  Last 300 seconds output utility rate: 0.00%  
Run the display atm pvc-info command to view the status of PVCs.
<HUAWEI> display atm pvc-info
 VPI/VCI  |STATE|PVC-NAME        |ENCAP    |PROTOCOL|INTERFACE
----------|-----|----------------|---------|--------|-----------------
  10/20   |UP   |                |1        |IP      |Atm0/2/0 (UP)       
 100/100  |UP   |                |1        |IP      |Atm0/2/0.100 (UP)
Run the display atm pvc-info statistics command to check PVC traffic statistic.
<HUAWEI> display atm pvc-info statistics
ATM PVC-info statistics for interface Atm0/1/0:                  
Maximum VCs: 2048                                                
Total VCs  : 1                                                   
UP VCs     : 1     DOWN VCs   : 0                                
Static VCs : 1                                                   
ATM PVC-info statistics for interface Atm0/1/1.100:              
Maximum VCs: 2048                                                
Total VCs  : 1                                                   
UP VCs     : 1     DOWN VCs   : 0                                
Static VCs : 1  
Run the display atm map-info command to view mappings between PVCs and upper-layer protocols on ATM interfaces.
<HUAWEI> display atm map-info
Atm0/1/0, PVC 1/33, IP, State UP
  10.1.1.1
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Updated: 2019-01-02

Document ID: EDOC1100058399

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