Example for Configuring Bidirectional Flow-based iFIT on an L3VPN

This section provides an example for configuring bidirectional flow-based iFIT hop-by-hop measurement on an L3VPN.

Networking Requirements

You can configure iFIT on the L3VPN to monitor the packet loss rate and latency of the links between the PEs in real time. This enables you to respond to network issues if service quality deteriorates and therefore meet users' service quality requirements. iFIT supports bidirectional flow-based performance measurement. A backward flow instance is automatically generated based on the forward flow created on one device. On a live network, there are a large number of access devices but only a few core-layer devices. Therefore, creating a bidirectional flow on a core-layer device can greatly reduce the configuration and maintenance workload.

On the L3VPN shown in Figure 1, PE1 is a core-layer device, and PE2 is an access-layer device.

Figure 1 Bidirectional flow-based iFIT

Interfaces 1, 2, and 3 in this example represent GE 0/1/0, GE 0/1/8, and GE 0/1/16, respectively.

Configuration Roadmap

The configuration roadmap is as follows:

Configure an L3VPN on each PE and the P.
1. Configure an IP address for each interface and routing protocols, so that all devices can communicate at the network layer. This example uses IS-IS as the routing protocol.
2. Configure MPLS and public network tunnels to carry L3VPN services. In this example, SR-MPLS TE tunnels are used.
3. Configure a VPN instance on each PE, enable the IPv4 address family for the instance, and bind the instance to the PE interface connecting the PE to a CE.
4. Establish an MP-IBGP peer relationship between the PEs.
5. Configure EBGP between the CE and the PE to exchange routing information.
Configure 1588v2 to synchronize the clocks of all devices.
Configure packet loss and latency measurement on the PEs to collect packet loss rate and latency statistics at intervals.
Configure the device to send statistics to the NMS through telemetry.

Data Preparation

To complete the configuration, you need the following data:

IP address of each interface as listed in Figure 1
MPLS LSR IDs on the PEs and P
SRGB range on the PEs and P
Name, VPN target, and RD of the VPN instance on each PE
iFIT instance ID (1) and measurement interval (10s)
Target flow's source IP address (10.11.1.1) and destination IP address (10.22.2.2)
NMS's IP address (192.168.100.100) and port number (10001), and reachable routes between the NMS and device

Procedure

Configure an L3VPN on each PE and the P. For configuration details, see Configuration Files.

Configure 1588v2 to synchronize the clocks of the PEs and P.

# Configure the P to import clock signals from BITS0.

[~P] clock bits-type bits0 2mhz
[*P] clock source bits0 synchronization enable
[*P] clock source bits0 priority 1
[*P] commit

# Enable 1588v2 globally.

# Configure the P.

[~P] ptp enable 
[*P] ptp domain 1 
[*P] ptp device-type bc
[*P] ptp clock-source local clock-class 185
[*P] clock source ptp synchronization enable
[*P] clock source ptp priority 1
[*P] commit

# Configure PE1.

[~PE1] ptp enable 
[*PE1] ptp domain 1 
[*PE1] ptp device-type bc
[*PE1] ptp clock-source local clock-class 185
[*PE1] clock source ptp synchronization enable
[*PE1] clock source ptp priority 1
[*PE1] commit

# Configure PE2.

[~PE2] ptp enable 
[*PE2] ptp domain 1 
[*PE2] ptp device-type bc
[*PE2] ptp clock-source local clock-class 185
[*PE2] clock source ptp synchronization enable
[*PE2] clock source ptp priority 1
[*PE2] commit

Enable 1588v2 on interfaces.

# Configure the P.

[~P] interface gigabitethernet 0/1/0
[~P-GigabitEthernet0/1/0] ptp enable
[*P-GigabitEthernet0/1/0] commit
[~P-GigabitEthernet0/1/0] quit
[~P] interface gigabitethernet 0/1/8
[~P-GigabitEthernet0/1/8] ptp enable
[*P-GigabitEthernet0/1/8] commit
[~P-GigabitEthernet0/1/8] quit
[~P] interface gigabitethernet 0/1/16
[~P-GigabitEthernet0/1/16] ptp enable
[*P-GigabitEthernet0/1/16] commit
[~P-GigabitEthernet0/1/16] quit

# Configure PE1.

[~PE1] interface gigabitethernet 0/1/0
[~PE1-GigabitEthernet0/1/0] ptp enable
[*PE1-GigabitEthernet0/1/0] commit
[~PE1-GigabitEthernet0/1/0] quit
[~PE1] interface gigabitethernet 0/1/8
[~PE1-GigabitEthernet0/1/8] ptp enable
[*PE1-GigabitEthernet0/1/8] commit
[~PE1-GigabitEthernet0/1/8] quit

# Configure PE2.

[~PE2] interface gigabitethernet 0/1/0
[~PE2-GigabitEthernet0/1/0] ptp enable
[*PE2-GigabitEthernet0/1/0] commit
[~PE2-GigabitEthernet0/1/0] quit
[~PE2] interface gigabitethernet 0/1/8
[~PE2-GigabitEthernet0/1/8] ptp enable
[*PE2-GigabitEthernet0/1/8] commit
[~PE2-GigabitEthernet0/1/8] quit

Configure bidirectional flow-based iFIT for the link between PE1 and PE2.

# Configure PE1.

<PE1> system-view
[~PE1] ifit
[*PE1-ifit] node-id 10
[*PE1-ifit] encapsulation nexthop 3.3.3.9
[*PE1-ifit] instance 1
[*PE1-ifit-instance-1] measure-mode trace
[*PE1-ifit-instance-1] interval 10
[*PE1-ifit-instance-1] flow bidirectional source 10.11.1.1 destination 10.22.2.2 dscp 63 vpn-instance vpna
[*PE1-ifit-instance-1] binding interface gigabitethernet 0/1/0
[*PE1-ifit-instance-1] commit

# Run the display ifit static command to check the configuration and status of PE1.

[~PE1] display ifit static instance 1
-------------------------------------------------------------------------
Flow Classification                     : static
Instance Id                             : 10
Instance-name                           : 1 
Flow Id                                 : 1900545
Flow Type                               : bidirectional
Source IP Address/Mask Length           : 10.11.1.1/32
Destination IP Address/Mask Length      : 10.22.2.2/32
Protocol                                : any
Source Port                             : any
Destination Port                        : any
Gtp                                     : disable
Gtp TeId                                : --
Dscp                                    : 63
Interface                               : GigabitEthernet0/1/0
vpn-instance                            : vpna
Loss Measure                            : enable
Delay Measure                           : enable
Delay Per packet Measure                : disable
Disorder Measure                        : disable
Gtpu Sequence Measure                   : disable
Measure Mode                            : trace
Interval                                : 10(s)
Tunnel Type                             : --

# Configure the P.

<P> system-view
[~P] ifit
[*P-ifit] commit

# Configure PE2.

<PE2> system-view
[~PE2] ifit
[*PE2-ifit] node-id 20
[*PE2-ifit] encapsulation nexthop 1.1.1.9
[*PE2-ifit] commit

# Run the display ifit dynamic command to view the configuration and status of PE2.

[~PE2] display ifit dynamic
-------------------------------------------------------------------------
Flow Classification                     : dynamic
Instance Id                             : 100
Flow Id                                 : 2099183
Flow Type                               : unidirectional
Source IP Address/Mask Length           : 10.22.2.2/32
Destination IP Address/Mask Length      : 10.11.1.1/32
Protocol                                : any
Source Port                             : any
Destination Port                        : any
Gtp                                     : disable
Gtp TeId                                : --
Dscp                                    : 63
Interface                               : GigabitEthernett0/1/0
vpn-instance                            : vpna
Loss Measure                            : enable
Delay Measure                           : enable
Delay Per packet Measure                : disable
Disorder Measure                        : disable
Gtpu Sequence Measure                   : disable
Measure Mode                            : e2e
Interval                                : 10(s)
Tunnel Type                             : --

Configure the device to send statistics to the NMS through telemetry. The following uses PE1 as an example.

[~PE1] telemetry
[~PE1-telemetry] destination-group ifit
[*PE1-telemetry-destination-group-ifit] ipv4-address 192.168.100.100 port 10001 protocol grpc no-tls
[*PE1-telemetry-destination-group-ifit] quit
[*PE1-telemetry] sensor-group ifit
[*PE1-telemetry-sensor-group-ifit] sensor-path huawei-ifit:ifit/huawei-ifit-statistics:flow-hop-statistics/flow-hop-statistic
[*PE1-telemetry-sensor-group-ifit-path] quit
[*PE1-telemetry-sensor-group-ifit] sensor-path huawei-ifit:ifit/huawei-ifit-statistics:flow-statistics/flow-statistic
[*PE1-telemetry-sensor-group-ifit-path] quit
[*PE1-telemetry-sensor-group-ifit] quit
[*PE1-telemetry] subscription ifit
[*PE1-telemetry-subscription-ifit] sensor-group ifit sample-interval 0
[*PE1-telemetry-subscription-ifit] destination-group ifit
[*PE1-telemetry-subscription-ifit] commit

Configuration Files

PE1 configuration file

#
sysname PE1
#
ptp enable
ptp domain 1
ptp device-type bc
ptp clock-source local clock-class 185
#
clock source ptp synchronization enable
clock source ptp priority 1
#
ip vpn-instance vpna
 ipv4-family
  route-distinguisher 100:1
  apply-label per-instance
  tnl-policy p1
  vpn-target 111:1 export-extcommunity
  vpn-target 111:1 import-extcommunity
#
mpls lsr-id 1.1.1.9
#               
mpls            
 mpls te
#             
explicit-path pe2
 next sid label 16200 type prefix
 next sid label 16300 type prefix
#               
segment-routing 
#               
isis 1
 is-level level-2
 cost-style wide
 network-entity 10.0000.0000.0001.00
 traffic-eng level-2
 segment-routing mpls
 segment-routing global-block 16000 20000
#               
interface GigabitEthernet0/1/0
 undo shutdown  
 ip binding vpn-instance vpna
 ip address 10.1.1.2 255.255.255.0
 ptp enable
#               
interface GigabitEthernet0/1/8
 undo shutdown
 ip address 172.16.1.1 255.255.255.0
 isis enable 1
 ptp enable
#              
interface LoopBack1
 ip address 1.1.1.9 255.255.255.255
 isis enable 1
 isis prefix-sid absolute 16100 
#               
bgp 100         
 peer 3.3.3.9 as-number 100
 peer 3.3.3.9 connect-interface LoopBack1
 #              
 ipv4-family unicast
  undo synchronization
  peer 3.3.3.9 enable
 #              
 ipv4-family vpnv4
  policy vpn-target
  peer 3.3.3.9 enable
 #              
 ipv4-family vpn-instance vpna
  peer 10.1.1.1 as-number 65410
#
interface Tunnel1
 ip address unnumbered interface LoopBack1
 tunnel-protocol mpls te
 destination 3.3.3.9
 mpls te signal-protocol segment-routing
 mpls te tunnel-id 1
 mpls te path explicit-path pe2
#
tunnel-policy p1
 tunnel select-seq sr-te load-balance-number 1
#
ifit
 node-id 10
 encapsulation nexthop 3.3.3.9
 instance 1
  measure-mode trace
  interval 10
  flow bidirectional source 10.11.1.1 destination 10.22.2.2 dscp 63 vpn-instance vpna
  binding interface GigabitEthernet0/1/0 
#
telemetry
 #
 sensor-group ifit
  sensor-path huawei-ifit:ifit/huawei-ifit-statistics:flow-hop-statistics/flow-hop-statistic
  sensor-path huawei-ifit:ifit/huawei-ifit-statistics:flow-statistics/flow-statistic
 #
 destination-group ifit
  ipv4-address 192.168.100.100 port 10001 protocol grpc no-tls
 #
 subscription ifit
  sensor-group ifit sample-interval 0
  destination-group ifit
#
return

P configuration file

#
sysname P1
#                                                                               
ptp enable
ptp domain 1
ptp device-type bc
ptp clock-source local clock-class 185
#
clock source bits0 synchronization enable
clock source bits0 priority 1
clock source ptp synchronization enable
clock source ptp priority 1
clock bits-type bits0 2mhz
#
mpls lsr-id 2.2.2.9
#               
mpls            
 mpls te        
#               
segment-routing 
#               
isis 1
 is-level level-2
 cost-style wide
 network-entity 10.0000.0000.0002.00
 traffic-eng level-2
 segment-routing mpls
 segment-routing global-block 16000 20000
#
interface GigabitEthernet0/1/0
 undo shutdown  
 ip address 172.16.1.2 255.255.255.0
 isis enable 1 
 ptp enable 
#               
interface GigabitEthernet0/1/8
 undo shutdown  
 ip address 172.17.1.1 255.255.255.0
 isis enable 1
 ptp enable  
# 
interface GigabitEthernet0/1/16                                                  
 undo shutdown                                                                  
 ip address 172.18.1.1 255.255.255.0                                             
 ptp enable
# 
interface LoopBack1
 ip address 2.2.2.9 255.255.255.255
 isis enable 1
 isis prefix-sid absolute 16200 
#
ifit
#
return

PE2 configuration file

#
sysname PE2
#
ptp enable
ptp domain 1
ptp device-type bc
ptp clock-source local clock-class 185
#
clock source ptp synchronization enable
clock source ptp priority 1
#
ip vpn-instance vpna
 ipv4-family
  route-distinguisher 200:1
  apply-label per-instance
  tnl-policy p1
  vpn-target 111:1 export-extcommunity
  vpn-target 111:1 import-extcommunity
#
mpls lsr-id 3.3.3.9
#               
mpls            
 mpls te  
#
explicit-path pe1
 next sid label 16200 type prefix
 next sid label 16100 type prefix
#               
segment-routing 
#               
isis 1
 is-level level-2
 cost-style wide
 network-entity 10.0000.0000.0003.00
 traffic-eng level-2
 segment-routing mpls
 segment-routing global-block 16000 20000
#               
interface GigabitEthernet0/1/0
 undo shutdown  
 ip binding vpn-instance vpna
 ip address 10.2.1.2 255.255.255.0
 ptp enable
#               
interface GigabitEthernet0/1/8
 undo shutdown  
 ip address 172.17.1.2 255.255.255.0
 isis enable 1  
 ptp enable
#               
interface LoopBack1
 ip address 3.3.3.9 255.255.255.255
 isis enable 1
 isis prefix-sid absolute 16300
#
interface Tunnel1
 ip address unnumbered interface LoopBack1
 tunnel-protocol mpls te
 destination 1.1.1.9
 mpls te signal-protocol segment-routing
 mpls te tunnel-id 1
 mpls te path explicit-path pe1 
#               
bgp 100         
 peer 1.1.1.9 as-number 100
 peer 1.1.1.9 connect-interface LoopBack1
 #              
 ipv4-family unicast
  undo synchronization
  peer 1.1.1.9 enable
 #              
 ipv4-family vpnv4
  policy vpn-target
  peer 1.1.1.9 enable
 #              
 ipv4-family vpn-instance vpna
  peer 10.2.1.1 as-number 65420
#
tunnel-policy p1
 tunnel select-seq sr-te load-balance-number 1
#
ifit
 node-id 20
 encapsulation nexthop 1.1.1.9
#
return

CE1 configuration file

#
sysname CE1
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.1.1.1 255.255.255.0
#
interface LoopBack1
 ip address 10.11.1.1 255.255.255.255
#
bgp 65410
 peer 10.1.1.2 as-number 100
 #
 ipv4-family unicast
  undo synchronization
  peer 10.1.1.2 enable
  network 10.11.1.1 255.255.255.255
#
return

CE2 configuration file

#
sysname CE2
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.2.1.1 255.255.255.0
#
interface LoopBack1
 ip address 10.22.2.2 255.255.255.255
#
bgp 65420
 peer 10.2.1.2 as-number 100
 #
 ipv4-family unicast
  undo synchronization
  peer 10.2.1.2 enable
  network 10.22.2.2 255.255.255.255
#
return