Bidirectional MPLS TE tunnel configuration example
Network requirements
Switch A, Switch B, Switch C, and Switch D all run IS-IS and they are all level-2 switches.
Use RSVP-TE to establish a bidirectional MPLS TE tunnel between Switch A and Switch D.
Figure 33: Network diagram
Table 5: Interface and IP address assignment
Device | Interface | IP address | Device | Interface | IP address |
|---|---|---|---|---|---|
Switch A | Loop0 | 1.1.1.9/32 | Switch D | Loop0 | 4.4.4.9/32 |
Vlan-int1 | 10.1.1.1/24 | Vlan-int3 | 30.1.1.2/24 | ||
Switch B | Loop0 | 2.2.2.9/32 | Switch C | Loop0 | 3.3.3.9/32 |
Vlan-int1 | 10.1.1.2/24 | Vlan-int3 | 30.1.1.1/24 | ||
Vlan-int2 | 20.1.1.1/24 | Vlan-int2 | 20.1.1.2/24 |
Configuration procedure
Configure IP addresses and masks for interfaces. (Details not shown.)
Configure IS-IS to advertise interface addresses, including the loopback interface address.
For more information, see "Establishing an MPLS TE tunnel with RSVP-TE."
Configure an LSR ID, and enable MPLS, MPLS TE, and RSVP-TE on each switch. Configure Switch A and Switch D to assign a non-null label to the penultimate hop:
# Configure Switch A.
<SwitchA> system-view [SwitchA] mpls lsr-id 1.1.1.9 [SwitchA] mpls label advertise non-null [SwitchA] mpls te [SwitchA-te] quit [SwitchA] rsvp [SwitchA-rsvp] quit [SwitchA] interface vlan-interface 1 [SwitchA-Vlan-interface1] mpls enable [SwitchA-Vlan-interface1] mpls te enable [SwitchA-Vlan-interface1] rsvp enable [SwitchA-Vlan-interface1] quit
# Configure Switch B.
<SwitchB> system-view [SwitchB] mpls lsr-id 2.2.2.9 [SwitchB] mpls te [SwitchB-te] quit [SwitchB] rsvp [SwitchB-rsvp] quit [SwitchB] interface vlan-interface 1 [SwitchB-Vlan-interface1] mpls enable [SwitchB-Vlan-interface1] mpls te enable [SwitchB-Vlan-interface1] rsvp enable [SwitchB-Vlan-interface1] quit [SwitchB] interface vlan-interface 2 [SwitchB-Vlan-interface2] mpls enable [SwitchB-Vlan-interface2] mpls te enable [SwitchB-Vlan-interface2] rsvp enable [SwitchB-Vlan-interface1] quit
# Configure Switch C.
<SwitchC> system-view [SwitchC] mpls lsr-id 3.3.3.9 [SwitchC] mpls te [SwitchC-te] quit [SwitchC] rsvp [SwitchC-rsvp] quit [SwitchC] interface vlan-interface 3 [SwitchC-Vlan-interface3] mpls enable [SwitchC-Vlan-interface3] mpls te enable [SwitchC-Vlan-interface3] rsvp enable [SwitchC-Vlan-interface3] quit [SwitchC] interface vlan-interface 2 [SwitchC-Vlan-interface2] mpls enable [SwitchC-Vlan-interface2] mpls te enable [SwitchC-Vlan-interface2] rsvp enable [SwitchC-Vlan-interface2] quit
# Configure Switch D.
<SwitchD> system-view [SwitchD] mpls lsr-id 4.4.4.9 [SwitchD] mpls label advertise non-null [SwitchD] mpls te [SwitchD-te] quit [SwitchD] rsvp [SwitchD-rsvp] quit [SwitchD] interface vlan-interface 3 [SwitchD-Vlan-interface3] mpls enable [SwitchD-Vlan-interface3] mpls te enable [SwitchD-Vlan-interface3] rsvp enable [SwitchD-Vlan-interface3] quit
Configure IS-IS TE:
# Configure Switch A.
[SwitchA] isis 1 [SwitchA-isis-1] cost-style wide [SwitchA-isis-1] mpls te enable level-2 [SwitchA-isis-1] quit
# Configure Switch B.
[SwitchB] isis 1 [SwitchB-isis-1] cost-style wide [SwitchB-isis-1] mpls te enable level-2 [SwitchB-isis-1] quit
# Configure Switch C.
[SwitchC] isis 1 [SwitchC-isis-1] cost-style wide [SwitchC-isis-1] mpls te enable level-2 [SwitchC-isis-1] quit
# Configure Switch D.
[SwitchD] isis 1 [SwitchD-isis-1] cost-style wide [SwitchD-isis-1] mpls te enable level-2 [SwitchD-isis-1] quit
Configure a co-routed bidirectional MPLS TE tunnel:
# Configure Switch A as the active end of the co-routed bidirectional tunnel.
[SwitchA] interface tunnel 1 mode mpls-te [SwitchA-Tunnel1] ip address 7.1.1.1 255.255.255.0 [SwitchA-Tunnel1] destination 4.4.4.9 [SwitchA-Tunnel1] mpls te signaling rsvp-te [SwitchA-Tunnel1] mpls te resv-style ff [SwitchA-Tunnel1] mpls te bidirectional co-routed active [SwitchA-Tunnel1] quit
# Configure Switch D as the passive end of the co-routed bidirectional tunnel.
[SwitchD] interface tunnel 4 mode mpls-te [SwitchD-Tunnel4] ip address 8.1.1.1 255.255.255.0 [SwitchD-Tunnel4] destination 1.1.1.9 [SwitchD-Tunnel4] mpls te signaling rsvp-te [SwitchD-Tunnel4] mpls te resv-style ff [SwitchD-Tunnel4] mpls te bidirectional co-routed passive reverse-lsp lsr-id 1.1.1.9 tunnel-id 1 [SwitchD-Tunnel4] quit
Verifying the configuration
# Verify that the tunnel interface is up on Switch A.
[SwitchA] display interface tunnel Tunnel1 Current state: UP Line protocol state: UP Description: Tunnel1 Interface Bandwidth: 64kbps Maximum transmission unit: 1496 Internet address: 7.1.1.1/24 (primary) Tunnel source unknown, destination 4.4.4.9 Tunnel protocol/transport CR_LSP Last clearing of counters: Never Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec Last 300 seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec Input: 0 packets, 0 bytes, 0 drops Output: 0 packets, 0 bytes, 0 drops
# Display detailed information about the MPLS TE tunnel on Switch A.
[SwitchA] display mpls te tunnel-interface Tunnel Name : Tunnel 1 Tunnel State : Up (Main CRLSP up, Reverse CRLSP up) Tunnel Attributes : LSP ID : 30478 Tunnel ID : 1 Admin State : Normal Ingress LSR ID : 1.1.1.9 Egress LSR ID : 4.4.4.9 Signaling : RSVP-TE Static CRLSP Name : - Resv Style : FF Tunnel mode : Co-routed, active Reverse-LSP name : - Reverse-LSP LSR ID : - Reverse-LSP Tunnel ID: - Class Type : CT0 Tunnel Bandwidth : 0 kbps Reserved Bandwidth : 0 kbps Setup Priority : 7 Holding Priority : 7 Affinity Attr/Mask : 0/0 Explicit Path : - Backup Explicit Path : - Metric Type : TE Record Route : Disabled Record Label : Disabled FRR Flag : Disabled Bandwidth Protection : Disabled Backup Bandwidth Flag: Disabled Backup Bandwidth Type: - Backup Bandwidth : - Bypass Tunnel : No Auto Created : No Route Pinning : Disabled Retry Limit : 10 Retry Interval : 2 sec Reoptimization : Disabled Reoptimization Freq : - Backup Type : None Backup LSP ID : - Auto Bandwidth : Disabled Auto Bandwidth Freq : - Min Bandwidth : - Max Bandwidth : - Collected Bandwidth : -
# Display detailed information about the bidirectional MPLS TE tunnel on Switch A.
[SwitchA] display mpls lsp verbose Destination : 4.4.4.9 FEC : 1.1.1.9/1/30478 Protocol : RSVP LSR Type : Ingress Service : - NHLFE ID : 1027 State : Active Out-Label : 1149 Nexthop : 10.1.1.2 Out-Interface: Vlan1 Destination : 4.4.4.9 FEC : 1.1.1.9/1/30478 Protocol : RSVP LSR Type : Egress Service : - In-Label : 1151 State : Active Nexthop : 127.0.0.1 Out-Interface: - Destination : 10.1.1.2 FEC : 10.1.1.2 Protocol : Local LSR Type : Ingress Service : - NHLFE ID : 1026 State : Active Nexthop : 10.1.1.2 Out-Interface: Vlan1
# Verify that the tunnel interface is up on Switch D.
[SwitchD] display interface tunnel Tunnel4 Current state: UP Line protocol current state: UP Description: Tunnel4 Interface Bandwidth: 64kbps Maximum transmission unit: 1496 Internet address: 8.1.1.1/24 (primary) Tunnel source unknown, destination 1.1.1.9 Tunnel TTL 255 Tunnel protocol/transport CR_LSP Last clearing of counters: Never Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec Last 300 seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec Input: 0 packets input, 0 bytes, 0 drops Output: 0 packets output, 0 bytes, 0 drops
# Display detailed information about the MPLS TE tunnel on Switch D.
[SwitchD] display mpls te tunnel-interface Tunnel Name : Tunnel 4 Tunnel State : Up (Main CRLSP up, Reverse CRLSP up) Tunnel Attributes : LSP ID : - Tunnel ID : 8 Admin State : Normal Ingress LSR ID : - Egress LSR ID : - Signaling : RSVP-TE Static CRLSP Name : - Resv Style : FF Tunnel mode : Co-routed, passive Reverse-LSP name : - Reverse-LSP LSR ID : 1.1.1.9 Reverse-LSP Tunnel ID: 1 Class Type : - Tunnel Bandwidth : - Reserved Bandwidth : - Setup Priority : - Holding Priority : - Affinity Attr/Mask : -/- Explicit Path : - Backup Explicit Path : - Metric Type : - Record Route : - Record Label : - FRR Flag : - Bandwidth Protection : - Backup Bandwidth Flag: - Backup Bandwidth Type: - Backup Bandwidth : - Bypass Tunnel : - Auto Created : No Route Pinning : - Retry Limit : - Retry Interval : - Reoptimization : - Reoptimization Freq : - Backup Type : - Backup LSP ID : - Auto Bandwidth : - Auto Bandwidth Freq : - Min Bandwidth : - Max Bandwidth : - Collected Bandwidth : -
# Display detailed information about the bidirectional MPLS TE tunnel on Switch D.
[SwitchD] display mpls lsp verbose Destination : 4.4.4.9 FEC : 1.1.1.9/1/30478 Protocol : RSVP LSR Type : Egress Service : - In-Label : 3 State : Active Nexthop : 127.0.0.1 Out-Interface: - Destination : 4.4.4.9 FEC : 1.1.1.9/1/30478 Protocol : RSVP LSR Type : Ingress Service : - NHLFE ID : 1025 State : Active Out-Label : 1150 Nexthop : 30.1.1.1 Out-Interface: Vlan1 Destination : 30.1.1.1 FEC : 30.1.1.1 Protocol : Local LSR Type : Ingress Service : - NHLFE ID : 1024 State : Active Nexthop : 30.1.1.1 Out-Interface: Vlan1