Example for Configuring iFIT in Public Network Traffic over SRv6 Scenarios

This section provides an example for configuring iFIT to implement hop-by-hop packet loss and delay measurement in public network IPv4 over SRv6 scenarios.

Networking Requirements

You can configure iFIT on the public network 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. In the public network IPv4 over SRv6 scenario shown in Figure 1, PE1, the P, and PE2 belong to the same AS and need to run IS-IS to implement IPv6 network connectivity. PE1, the P, and PE2 are Level-1 devices that belong to IS-IS process 1. An IBGP peer relationship needs to be established between PE1 and PE2, and EBGP peer relationships need to be established between the PEs and Devices. A bidirectional SRv6 TE Policy needs to be established between PE1 and PE2 to carry public network IPv4 services. Service flows enter the network through PE1, traverses the P, and leaves the network through PE2.

Figure 1 iFIT in public network traffic over SRv6 scenarios

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 public network IPv4 over SRv6 TE Policy on each PE and P.
1. Enable IPv6 forwarding on each device and configure IPv6 addresses for involved interfaces.
2. Enable IS-IS, configure a level, and specify a network entity on each device.
3. Establish an EBGP peer relationship between the PEs and Devices.
4. Set up an MP-IBGP peer relationship between the PEs.
5. Deploy an SRv6 TE Policy between PE1 and PE2, and enable IS-IS SRv6.
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
IS-IS process IDs of the PEs and P
IS-IS levels on the PEs and P
iFIT instance ID (1) and measurement interval (10s)
Target flow's source IP address (10.1.1.1) and destination IP address (10.2.1.1)
NMS's IP address (192.168.100.100) and port number (10001), and reachable routes between the NMS and device

Procedure

Configure public network IPv4 over SRv6 TE Policy 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 iFIT for the link between PE1 and PE2.

# Configure PE1.

<PE1> system-view
[~PE1] ifit
[*PE1-ifit] node-id 10
[*PE1-ifit] instance 1
[*PE1-ifit-instance-1] measure-mode trace
[*PE1-ifit-instance-1] interval 10
[*PE1-ifit-instance-1] flow unidirectional source 10.1.1.1 destination 10.2.1.1 dscp 63
[*PE1-ifit-instance-1] binding interface gigabitethernet 0/1/8
[*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                                 : 2099183617
Flow Type                               : unidirectional
Source IP Address/Mask Length           : 10.1.1.1/32
Destination IP Address/Mask Length      : 10.2.1.1/32
Protocol                                : any
Source Port                             : any
Destination Port                        : any
Gtp                                     : disable
Gtp TeId                                : --
Dscp                                    : 63
Interface                               : GigabitEthernet0/1/8
vpn-instance                            : --
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

# Run the display ifit dynamic-hop command to view the configuration and status of the P.

[~P] display ifit dynamic-hop
-------------------------------------------------------------------------
Flow Classification                     : dynamic-hop
Instance Id                             : 514
Flow Id                                 : 2099183617
Flow Type                               : unidirectional
Interface                               : GigabitEthernet0/1/8
Direction                               : transitOutput
Loss Measure                            : enable
Delay Measure                           : enable
Disorder Measure                        : disable
Interval                                : 10(s)
-------------------------------------------------------------------------
Flow Classification                     : dynamic-hop
Instance Id                             : 513
Flow Id                                 : 2099183617
Flow Type                               : unidirectional
Interface                               : GigabitEthernet0/1/0
Direction                               : transitInput
Loss Measure                            : enable
Delay Measure                           : enable
Disorder Measure                        : disable
Interval                                : 10(s)

# Configure PE2.

<PE2> system-view
[~PE2] ifit
[*PE2-ifit] commit

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

[~PE2] display ifit dynamic-hop
-------------------------------------------------------------------------
Flow Classification                     : dynamic-hop
Instance Id                             : 514
Flow Id                                 : 2099183617
Flow Type                               : unidirectional
Interface                               : GigabitEthernet0/1/8
Direction                               : egress
Loss Measure                            : enable
Delay Measure                           : enable
Disorder Measure                        : disable
Interval                                : 10(s)
-------------------------------------------------------------------------
Flow Classification                     : dynamic-hop
Instance Id                             : 513
Flow Id                                 : 2099183617
Flow Type                               : unidirectional
Interface                               : GigabitEthernet0/1/0
Direction                               : transitInput
Loss Measure                            : enable
Delay Measure                           : enable
Disorder Measure                        : disable
Interval                                : 10(s)

# 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] ipv6-address 2001:DB8:101::1 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
#
tunnel-selector p1 permit node 1
 apply tunnel-policy p1
#
segment-routing ipv6
 encapsulation source-address 2001:DB8:1::1
 locator aa ipv6-prefix 2001:DB8:100:: 64 static 32
  opcode ::100 end psp 
 segment-list list1
  index 5 sid ipv6 2001:DB8:200::100
 srv6-te policy policy1 endpoint 2001:DB8:2::2 color 101
  candidate-path preference 100
   segment-list list1
#
isis 1
 is-level level-1
 cost-style wide
 network-entity 10.0000.0000.0001.00
 #
 ipv6 enable topology ipv6
 segment-routing ipv6 locator aa
 #
#
interface GigabitEthernet0/1/0
 undo shutdown
 ipv6 enable
 ipv6 address 2001:DB8:10::1/96
 isis ipv6 enable 1
 ptp enable
#
interface GigabitEthernet0/1/8
 undo shutdown
 ip address 192.168.1.2 255.255.255.0
 ptp enable
#
interface LoopBack1
 ipv6 enable
 ipv6 address 2001:DB8:1::1/64
 isis ipv6 enable 1
#
bgp 100
 router-id 1.1.1.1
 peer 192.168.1.1 as-number 200
 peer 2001:DB8:2::2 as-number 100
 peer 2001:DB8:2::2 connect-interface LoopBack1
 #
 ipv4-family unicast
  undo synchronization
  network 192.168.1.0 255.255.255.0
  unicast-route recursive-lookup tunnel-v6 tunnel-selector p1
  segment-routing ipv6 locator aa
  segment-routing ipv6 traffic-engineer
  peer 192.168.1.1 enable
  peer 2001:DB8:2::2 enable
  peer 2001:DB8:2::2 route-policy color export
  peer 2001:DB8:2::2 advertise-ext-community
  peer 2001:DB8:2::2 prefix-sid
#
route-policy color permit node 10
 apply extcommunity color 0:101
#
tunnel-policy p1
 tunnel select-seq ipv6 srv6-te-policy load-balance-number 1
#
ifit
 node-id 10
 instance 1
  measure-mode trace
  interval 10
  flow unidirectional source 10.1.1.1 destination 10.2.1.1 dscp 63
  binding interface GigabitEthernet0/1/8 
#
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
  ipv6-address 2001:DB8:101::1 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
#
isis 1          
 is-level level-1
 cost-style wide
 network-entity 10.0000.0000.0002.00
 #              
 ipv6 enable topology ipv6
 #
#  
interface GigabitEthernet0/1/0
 undo shutdown
 ipv6 enable
 ipv6 address 2001:DB8:10::2/96
 isis ipv6 enable 1
 ptp enable
#               
interface GigabitEthernet0/1/8
 undo shutdown
 ipv6 enable
 ipv6 address 2001:DB8:20::1/96
 isis ipv6 enable 1
 ptp enable
#
interface GigabitEthernet0/1/16
 undo shutdown
 ipv6 enable
 ipv6 address 2001:DB8:30::3/96
 ptp enable
#
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
#
tunnel-selector p1 permit node 1
 apply tunnel-policy p1
#
segment-routing ipv6
 encapsulation source-address 2001:DB8:2::2
 locator aa ipv6-prefix 2001:DB8:200:: 64 static 32
  opcode ::100 end psp
 segment-list list1
  index 5 sid ipv6 2001:DB8:100::100
 srv6-te policy policy1 endpoint 2001:DB8:1::1 color 101
  candidate-path preference 100
   segment-list list1
#
isis 1
 is-level level-1
 cost-style wide
 network-entity 10.0000.0000.0003.00
 #
 ipv6 enable topology ipv6
 segment-routing ipv6 locator aa
 #
#
interface GigabitEthernet0/1/0
 undo shutdown
 ipv6 enable
 ipv6 address 2001:DB8:20::2/96
 isis ipv6 enable 1
 ptp enable
#
interface GigabitEthernet0/1/8
 undo shutdown
 ip address 192.168.2.2 255.255.255.0
 ptp enable
#
interface LoopBack1
 ipv6 enable
 ipv6 address 2001:DB8:2::2/64
 isis ipv6 enable 1
#
bgp 100
 router-id 2.2.2.2
 peer 192.168.2.1 as-number 300
 peer 2001:DB8:1::1 as-number 100
 peer 2001:DB8:1::1 connect-interface LoopBack1
 #
 ipv4-family unicast
  undo synchronization
  network 192.168.2.0 255.255.255.0
  unicast-route recursive-lookup tunnel-v6 tunnel-selector p1
  segment-routing ipv6 locator aa
  segment-routing ipv6 traffic-engineer
  peer 192.168.2.1 enable
  peer 2001:DB8:1::1 enable
  peer 2001:DB8:1::1 route-policy color export
  peer 2001:DB8:1::1 advertise-ext-community
  peer 2001:DB8:1::1 prefix-sid
#
route-policy color permit node 10
 apply extcommunity color 0:101
#
tunnel-policy p1
 tunnel select-seq ipv6 srv6-te-policy load-balance-number 1
#
ifit
#
return

DeviceA configuration file

#
sysname DeviceA
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 192.168.1.1 255.255.255.0
#
bgp 200
 router-id 4.4.4.4
 peer 192.168.1.2 as-number 100
 #
 ipv4-family unicast
  undo synchronization
  peer 192.168.1.2 enable
#               
return

DeviceB configuration file

#
sysname DeviceB
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 192.168.2.1 255.255.255.0
#
bgp 300
 router-id 5.5.5.5
 peer 192.168.2.2 as-number 100
 #
 ipv4-family unicast
  undo synchronization
  peer 192.168.2.2 enable
#
return