Example for Configuring the LSP Trace Test for Checking the CR-LSP Hot Standby Tunnel

Networking Requirements

In the MPLS VPN shown in Figure 1, a TE tunnel with Switch C being the egress is set up on Switch A, and CR-LSP hot standby is configured on the TE tunnel.

OSPF is configured on SwitchA, SwitchB, SwitchC, and SwitchD to enable them to learn the 32-bit host addresses of the loopback interfaces from each other.
MPLS, MPLS TE, and MPLS RSVP-TE are enabled on SwitchA, SwitchB, SwitchC, and SwitchD.
MPLS, MPLS TE, and MPLS RSVP-TE are enabled on the interfaces connected to Switch A, Switch B, and Switch C. Then, a TE tunnel is set up from SwitchA to SwitchC.

In the preceding configurations:

The primary CR-LSP is Switch A-Switch B-Switch C.
The hot standby CR-LSP is Switch A-Switch D-Switch C.

In this manner, when the primary CR-LSP becomes faulty, traffic can be switched to the hot-standby CR-LSP. Traffic is switched back to the primary CR-LSP 15 seconds after the fault on the primary CR-LSP is rectified.

But if the hot standby CR-LSP is faulty and therefore is unable to carry the traffic that is switched from the primary CR-LSP, the hot standby CR-LSP needs to be detected. NQA LSP Trace can be used to detect the connectivity of the hot standby CR-LSP. This function can detect the connectivity of the hot standby CR-LSP and its performance in real time. This helps detect and identify faults on the hot standby CR-LSP.

In this scenario, ensure that all connected interfaces have STP disabled. If STP is enabled and VLANIF interfaces of switches are used to construct a Layer 3 ring network, an interface on the network may be blocked. As a result, Layer 3 services on the network cannot run normally.

Figure 1 Networking diagram of the LSP Trace test

Configuration Roadmap

The configuration roadmap is as follows:

Configure SwitchA as the NQA client and create an LSP Trace test instance on Switch A.
Configure SwitchC as the NQA server.

Procedure

Configure routes among SwitchA, SwitchB, SwitchC, and SwitchD.
For detailed configuration, see the configuration files in this example.
Configure MPLS RSVP-TE on SwitchA, SwitchB, SwitchC, and SwitchD.
For detailed configuration, see the configuration files in this example.
On SwitchA, set up a TE tunnel to SwitchC.
For detailed configuration, see the configuration files in this example.

Configure an NQA test instance on SwitchA.

# Enable the NQA client and create an LSP Trace test instance for checking the TE tunnel.

<HUAWEI> system-view
[HUAWEI] sysname SwitchA

[SwitchA] nqa test-instance admin lsptrace

[SwitchA-nqa-admin-lsptrace] test-type lsptrace

[SwitchA-nqa-admin-lsptrace] lsp-type te

[SwitchA-nqa-admin-lsptrace] lsp-tetunnel tunnel 1 hot-standby

Start the test.
```
[SwitchA-nqa-admin-lsptrace] start now
```

Verify the configuration.

[SwitchA-nqa-admin-lsptrace] display nqa results test-instance admin lsptrace

 NQA entry(admin, lsptrace) :testflag is inactive ,testtype is lsptrace
   1 . Test 1 result   The test is finished
   Completion:success                                Attempts number:1
   Disconnect operation number:0                     Operation timeout number:0
   System busy operation number:0                    Connection fail number:0   
   Operation sequence errors number:0                RTT Status errors number:0   
   Drop operation number:0                           
   Last good path Time:2009-04-24 11:22:21.2
   1 . Hop 1    
    Send operation times: 3               Receive response times: 3    
    Min/Max/Average Completion Time: 50/60/56   
    Sum/Square-Sum  Completion Time: 170/9700
    RTD OverThresholds number: 0    
    Last Good Probe Time: 2009-04-24 11:22:20.8 
    Destination ip address:10.1.3.2 
    Lost packet ratio: 0 % 
   2 . Hop 2    
    Send operation times: 3               Receive response times: 3    
    Min/Max/Average Completion Time: 80/110/93 
    Sum/Square-Sum  Completion Time: 280/26600
    RTD OverThresholds number: 0    
    Last Good Probe Time: 2009-04-24 11:22:21.2 
    Destination ip address:10.3.3.3
    Lost packet ratio: 0 %

Configuration Files

SwitchA configuration file

#
sysname SwitchA
#
vlan batch 10 30
#
mpls lsr-id 10.5.5.5
mpls
 mpls te
 mpls rsvp-te
 mpls te cspf
#
explicit-path backup
 next hop 10.1.3.2
 next hop 10.1.4.2
 next hop 10.3.3.3
#
explicit-path main
 next hop 10.1.1.2
 next hop 10.1.2.2
 next hop 10.3.3.3
#
interface Vlanif10
 ip address 10.5.5.5 255.255.255.0
 mpls
 mpls te
 mpls rsvp-te
#
interface Vlanif30
 ip address 10.1.3.1 255.255.255.0
 mpls
 mpls te
 mpls rsvp-te
#
interface  GigabitEthernet0/0/1
 port link-type hybrid
 port hybrid pvid vlan 10
 port hybrid untagged vlan 10
#
interface  GigabitEthernet0/0/2
 port link-type hybrid
 port hybrid pvid vlan 30
 port hybrid untagged vlan 30
#
interface LoopBack1
 ip address 10.5.5.5 255.255.255.255
#
interface Tunnel1
 ip address unnumbered interface LoopBack1
 tunnel-protocol mpls te
 destination 10.3.3.3
 mpls te tunnel-id 100
 mpls te record-route
 mpls te path explicit-path main
 mpls te path explicit-path backup secondary
 mpls te backup hot-standby mode revertive wtr 15
 mpls te backup ordinary best-effort
 mpls te commit
#
ospf 1
 opaque-capability enable
 area 0.0.0.0
  network 10.1.1.0 0.0.0.255
  network 10.5.5.5 0.0.0.0
  network 10.1.3.0 0.0.0.255
  mpls-te enable
#
nqa test-instance admin lsptrace
 test-type lsptrace
 lsp-type te
 lsp-tetunnel Tunnel1 hot-standby
#
return

SwitchB configuration file

#
sysname SwitchB
#
vlan batch 10 20
#
mpls lsr-id 10.2.2.2
mpls
 mpls te
 mpls rsvp-te
 mpls te cspf
#
interface Vlanif10
 ip address 10.1.1.2 255.255.255.0
 mpls
 mpls te
 mpls rsvp-te
#
interface Vlanif20
 ip address 10.1.2.1 255.255.255.0
 mpls
 mpls te
 mpls rsvp-te
#
interface  GigabitEthernet0/0/1
 port link-type hybrid
 port hybrid pvid vlan 20
 port hybrid untagged vlan 20
#
interface  GigabitEthernet0/0/2
 port link-type hybrid
 port hybrid pvid vlan 10
 port hybrid untagged vlan 10
#
interface LoopBack1
 ip address 10.2.2.2 255.255.255.255
#
ospf 1
 opaque-capability enable
 area 0.0.0.0
  network 10.1.1.0 0.0.0.255
  network 10.2.2.2 0.0.0.0
  network 10.1.2.0 0.0.0.255
  mpls-te enable
#
return

SwitchC configuration file

#
sysname SwitchC
#
vlan batch 20 40
#
mpls lsr-id 10.3.3.3
mpls
 mpls te
 mpls rsvp-te
 mpls te cspf
#
interface Vlanif20
 ip address 10.1.2.2 255.255.255.0
 mpls
 mpls te
 mpls rsvp-te
#
interface Vlanif40
 ip address 10.1.4.2 255.255.255.0
 mpls
 mpls te
 mpls rsvp-te
#
interface  GigabitEthernet0/0/1
 port link-type hybrid
 port hybrid pvid vlan 40
 port hybrid untagged vlan 40
#
interface  GigabitEthernet0/0/2
 port link-type hybrid
 port hybrid pvid vlan 20
 port hybrid untagged vlan 20
#
interface LoopBack1
 ip address 10.3.3.3 255.255.255.255
#
ospf 1
 opaque-capability enable
 area 0.0.0.0
  network 10.1.2.0 0.0.0.255
  network 10.1.4.0 0.0.0.255
  network 10.3.3.3 0.0.0.0
  mpls-te enable
#
return

SwitchD configuration file

#
sysname SwitchD
#
vlan batch 30 40
#
mpls lsr-id 10.4.4.4
mpls
 mpls te
 mpls rsvp-te
 mpls te cspf
#
interface Vlanif30
 ip address 10.1.3.2 255.255.255.0
 mpls
 mpls te
 mpls rsvp-te
#
interface Vlanif40
 ip address 10.1.4.1 255.255.255.0
 mpls
 mpls te
 mpls rsvp-te
#
interface  GigabitEthernet0/0/1
 port link-type hybrid
 port hybrid pvid vlan 30
 port hybrid untagged vlan 30
#
interface  GigabitEthernet0/0/2
 port link-type hybrid
 port hybrid pvid vlan 40
 port hybrid untagged vlan 40
#
interface LoopBack1
 ip address 10.4.4.4 255.255.255.255
#
ospf 1
 opaque-capability enable
 area 0.0.0.0
  network 10.4.4.4 0.0.0.0
  network 10.1.3.0 0.0.0.255
  network 10.1.4.0 0.0.0.255
  mpls-te enable
#
return