Example for Configuring a Static MPLS TE Tunnel
Networking Requirements
As shown in Figure 4-43, static TE tunnels from LSRA to LSRC and from LSRC to LSRA need to be set up.
Configuration Roadmap
The configuration roadmap is as follows:
Assign an IP address to each interface on each LSR and configure OSPF to ensure that there are reachable routes between LSRs.
Configure an ID for each LSR and globally enable MPLS and MPLS TE on each LSR and interface.
Create a tunnel interface on the ingress node and set the tunnel type to static CR-LSP.
Configure the static LSP bound to the tunnel; specify the next hop address and outgoing label on the ingress node; specify the inbound interface, inbound label, next hop address, and outgoing label on the transit node; specify the incoming label and inbound interface on the egress node.
The value of the outgoing label of each node is the value of the incoming label of its next node.
When running the static-cr-lsp ingress { tunnel-interface tunnel interface-number | tunnel-name } destination destination-address { nexthop next-hop-address | outgoing-interface interface-type interface-number } * out-label out-label command to configure the ingress node of a CR-LSP, ensure that tunnel-name must be the same as the tunnel name created by using the interface tunnel interface-number command. tunnel-name is a case-sensitive character string without spaces. For example, the name of the tunnel created by using the interface tunnel 0/0/1 command is Tunnel0/0/1. In this case, the parameter of the ingress node of the static CR-LSP is Tunnel0/0/1; otherwise, the tunnel cannot be created. There is no such limitation on the transit node and egress node.
Procedure
- Configure an IP address and routing protocol for each interface.
# Configure LSRA. The configurations of LSRB and LSRC are similar to the configuration of LSRA, and are not mentioned here.
<Huawei> system-view [Huawei] sysname LSRA [LSRA] interface gigabitethernet 1/0/0 [LSRA-GigabitEthernet1/0/0] ip address 172.1.1.1 255.255.255.0 [LSRA-GigabitEthernet1/0/0] quit [LSRA] interface loopback 1 [LSRA-LoopBack1] ip address 1.1.1.9 255.255.255.255 [LSRA-LoopBack1] quit [LSRA] ospf 1 [LSRA-ospf-1] area 0 [LSRA-ospf-1-area-0.0.0.0] network 1.1.1.9 0.0.0.0 [LSRA-ospf-1-area-0.0.0.0] network 172.1.1.0 0.0.0.255 [LSRA-ospf-1-area-0.0.0.0] quit [LSRA-ospf-1] quit
After the configurations are complete, OSPF neighbor relationships can be set up between LSRA, LSRB, and LSRC. Run the display ospf peer command. You can see that the neighbor status is Full. Run the display ip routing-table command. You can see that LSRs have learnt the routes to Loopback1 of each other.
- Configure basic MPLS functions and enable MPLS TE.
# Configure LSRA. The configurations of LSRB and LSRC are similar to the configuration of LSRA, and are not mentioned here.
[LSRA] mpls lsr-id 1.1.1.9 [LSRA] mpls [LSRA-mpls] mpls te [LSRA-mpls] quit [LSRA] interface gigabitethernet 1/0/0 [LSRA-GigabitEthernet1/0/0] mpls [LSRA-GigabitEthernet1/0/0] mpls te [LSRA-GigabitEthernet1/0/0] quit
- Configure MPLS TE tunnels.
# On LSRA, create an MPLS TE tunnel from LSRA to LSRC.
[LSRA] interface tunnel 0/0/1 [LSRA-Tunnel0/0/1] ip address unnumbered interface loopback 1 [LSRA-Tunnel0/0/1] tunnel-protocol mpls te [LSRA-Tunnel0/0/1] destination 3.3.3.9 [LSRA-Tunnel0/0/1] mpls te tunnel-id 100 [LSRA-Tunnel0/0/1] mpls te signal-protocol cr-static [LSRA-Tunnel0/0/1] mpls te commit [LSRA-Tunnel0/0/1] quit
# On LSRC, create an MPLS TE tunnel from LSRC to LSRA.
[LSRC] interface tunnel 0/0/1 [LSRC-Tunnel0/0/1] ip address unnumbered interface loopback 1 [LSRC-Tunnel0/0/1] tunnel-protocol mpls te [LSRC-Tunnel0/0/1] destination 1.1.1.9 [LSRC-Tunnel0/0/1] mpls te tunnel-id 200 [LSRC-Tunnel0/0/1] mpls te signal-protocol cr-static [LSRC-Tunnel0/0/1] mpls te commit [LSRC-Tunnel0/0/1] quit
- Create a static CR-LSP from LSRA to LSRC.
# Configure LSRA as the ingress node of the static CR-LSP.
[LSRA] static-cr-lsp ingress tunnel-interface Tunnel0/0/1 destination 3.3.3.9 nexthop 172.1.1.2 out-label 20# Configure LSRB as the transit node of the static CR-LSP.
[LSRB] static-cr-lsp transit LSRA2LSRC incoming-interface gigabitethernet 1/0/0 in-label 20 nexthop 172.2.1.2 out-label 30
# Configure LSRC as the egress node of the static CR-LSP.
[LSRC] static-cr-lsp egress LSRA2LSRC incoming-interface gigabitethernet 1/0/0 in-label 30
- Create a static CR-LSP from LSRC to LSRA.
# Configure LSRC as the ingress node of the static CR-LSP.
[LSRC] static-cr-lsp ingress tunnel-interface Tunnel0/0/1 destination 1.1.1.9 nexthop 172.2.1.1 out-label 120# Configure LSRB as the transit node of the static CR-LSP.
[LSRB] static-cr-lsp transit LSRC2LSRA incoming-interface gigabitethernet 2/0/0 in-label 120 nexthop 172.1.1.1 out-label 130
# Configure LSRA as the egress node of the static CR-LSP.
[LSRA] static-cr-lsp egress LSRC2LSRA incoming-interface gigabitethernet 1/0/0 in-label 130
- Verify the configuration.
# After the configurations are complete, run the display interface tunnel command on LSRA. You can see that the tunnel interface status is Up.
# The display on LSRA is used as an example.
[LSRA] display interface tunnel 0/0/1 Tunnel0/0/1 current state : UP Line protocol current state : UP ...
# Run the display mpls te tunnel command on each LSR to view the MPLS TE tunnel status.
# The display on LSRA is used as an example.
[LSRA] display mpls te tunnel ------------------------------------------------------------------------------ Ingress LsrId Destination LSPID In/Out Label R Tunnel-name ------------------------------------------------------------------------------ 1.1.1.9 3.3.3.9 1 --/20 I Tunnel0/0/1 - - - 130/-- E LSRC2LSRA# Run the display mpls lsp or display mpls static-cr-lsp command on each LSR to view the static CR-LSP status.
# The display on LSRA is used as an example.
[LSRA] display mpls lsp ---------------------------------------------------------------------- LSP Information: STATIC CRLSP ---------------------------------------------------------------------- FEC In/Out Label In/Out IF Vrf Name 3.3.3.9/32 NULL/20 -/GE1/0/0 -/- 130/NULL GE1/0/0/- [LSRA] display mpls static-cr-lsp TOTAL : 2 STATIC CRLSP(S) UP : 2 STATIC CRLSP(S) DOWN : 0 STATIC CRLSP(S) Name FEC I/O Label I/O If Status Tunnel0/0/1 3.3.3.9/32 NULL/20 -/GE1/0/0 Up LSRC2LSRA -/- 130/NULL GE1/0/0/- Up# When a static CR-LSP is used to establish an MPLS TE tunnel, the transit node and the egress node do not forward packets according to the specified incoming label and outgoing label. Therefore, no EFC information is displayed on LSRB or LSRC.
Configuration Files
LSRA configuration file
# sysname LSRA # mpls lsr-id 1.1.1.9 mpls mpls te # interface GigabitEthernet1/0/0 ip address 172.1.1.1 255.255.255.0 mpls mpls te # interface LoopBack1 ip address 1.1.1.9 255.255.255.255 # interface Tunnel0/0/1 ip address unnumbered interface LoopBack1 tunnel-protocol mpls te destination 3.3.3.9 mpls te signal-protocol cr-static mpls te tunnel-id 100 mpls te commit # ospf 1 area 0.0.0.0 network 1.1.1.9 0.0.0.0 network 172.1.1.0 0.0.0.255 # static-cr-lsp ingress tunnel-interface Tunnel0/0/1 destination 3.3.3.9 nexthop 172.1.1.2 out-label 20 static-cr-lsp egress LSRC2LSRA incoming-interface GigabitEthernet1/0/0 in-label 130 # return
LSRB configuration file
# sysname LSRB # mpls lsr-id 2.2.2.9 mpls mpls te # interface GigabitEthernet1/0/0 ip address 172.1.1.2 255.255.255.0 mpls mpls te # interface GigabitEthernet2/0/0 ip address 172.2.1.1 255.255.255.0 mpls mpls te # interface LoopBack1 ip address 2.2.2.9 255.255.255.255 # ospf 1 area 0.0.0.0 network 2.2.2.9 0.0.0.0 network 172.1.1.0 0.0.0.255 network 172.2.1.0 0.0.0.255 # static-cr-lsp transit LSRA2LSRC incoming-interface GigabitEthernet1/0/0 in-label 20 nexthop 172.2.1.2 out-label 30 static-cr-lsp transit LSRC2LSRA incoming-interface GigabitEthernet2/0/0 in-label 120 nexthop 172.1.1.1 out-label 130 # return
LSRC configuration file
# sysname LSRC # mpls lsr-id 3.3.3.9 mpls mpls te # interface GigabitEthernet1/0/0 ip address 172.2.1.2 255.255.255.0 mpls mpls te # interface LoopBack1 ip address 3.3.3.9 255.255.255.255 # interface Tunnel0/0/1 ip address unnumbered interface LoopBack1 tunnel-protocol mpls te destination 1.1.1.9 mpls te signal-protocol cr-static mpls te tunnel-id 200 mpls te commit # ospf 1 area 0.0.0.0 network 3.3.3.9 0.0.0.0 network 172.2.1.0 0.0.0.255 # static-cr-lsp ingress tunnel-interface Tunnel0/0/1 destination 1.1.1.9 nexthop 172.2.1.1 out-label 120 static-cr-lsp egress LSRA2LSRC incoming-interface GigabitEthernet1/0/0 in-label 30 # return