MPLS TE is implemented after an MPLS TE tunnel is created and traffic is imported to the TE tunnel. To adjust MPLS TE parameters and deploy some security solutions, perform one or more of the following operations: adjusting RSVP-TE signaling parameters, adjusting the path of the CR-LSP, adjusting the establishment of MPLS TE tunnels and CR-LSP backup, and configuring BFD for CR-LSP.
Table 4-20 MPLS TE configuration tasksConfiguration Task
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Configuration
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Description
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Create an MPLS TE tunnel
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To transmit L2VPN or L3VPN services on the MPLS backbone network, and enable a tunnel to adapt to network topology changes to ensure stable data transmission, create an MPLS TE tunnel. The device supports dynamic MPLS TE tunnels. Dynamic MPLS TE tunnels are established using the RSVP-TE signaling protocol that can adjust the path of an MPLS TE tunnel according to network changes. There is no need to manually configure each hop on a large scale network.
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Configuring a Dynamic MPLS TE Tunnel
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Configure the MPLS TE tunnel to forward data traffic
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An MPLS TE tunnel does not automatically direct traffic. To enable traffic to travel along an MPLS TE tunnel, use one of the following methods to import the traffic to the MPLS TE tunnel:
Use static routes
This is the simplest method for importing the traffic to an MPLS TE tunnel.
Use tunnel policies
In general, VPN traffic is forwarded through an LSP tunnel but not an MPLS TE tunnel. To import VPN traffic to the MPLS TE tunnel, you need to configure a tunnel policy.
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Importing Traffic to an MPLS TE Tunnel
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Adjust MPLS TE parameters
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You can adjust MPLS TE parameters as required. The parameters are listed as follows: RSVP Signaling Parameters
RSVP signaling parameters include the RSVP reservation confirmation, RSVP timer, summary refresh, Hello extension mechanism, and RSVP authentication. You can adjust these parameters to meet customer requirements.
CR-LSP Selection
CSPF uses the TEDB and constraints to calculate appropriate paths and establishes CR-LSPs through the signaling protocol. MPLS TE provides multiple methods to control CSPF calculation, adjusting CR-LSP selection. The methods include:
- Configuring the tie-breaking of CSPF
- Configuring the metric for path calculation
- Configuring the CR-LSP hop limit
Establishment of MPLS TE Tunnels
During the establishment of an MPLS TE tunnel, you may need to perform specified configurations in practical applications. MPLS TE provides multiple methods to adjust establishment of MPLS TE tunnels. The methods include:
- Configuring route record and label record
- Configuring the tunnel priority
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Adjusting RSVP-TE Signaling Parameters
Adjusting the Path of a CR-LSP
Adjusting the Establishment of an MPLS TE Tunnel
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Configure MPLS TE reliability
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MPLS TE provides multiple reliability technologies to ensure high reliability of key services transmitted over MPLS TE tunnels. The device supports the following reliability features for MPLS TE tunnels:CR-LSP backup
Backup CR-LSPs are established on networks requiring high reliability to provide end-to-end protection, ensuring network reliability. If a primary CR-LSP fails, traffic rapidly switches to a backup CR-LSP, ensuring uninterrupted traffic transmission.
Hot standby is supported. If both primary and backup CR-LSPs fail, best-effort paths can be established, improving reliability.
BFD for CR-LSP
BFD monitors CR-LSPs. After BFD detects a fault in a CR-LSP, the BFD module immediately instructs the forwarding plane to trigger a rapid traffic switchover. BFD for CR-LSP is used together with a hot-standby CR-LSP.
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Configuring CR-LSP Backup
Configuring Static BFD for CR-LSPs
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