Establishing an MPLS TE tunnel with RSVP-TE
Network requirements
Switch A, Switch B, Switch C, and Switch D run IS-IS.
Use RSVP-TE to create an MPLS TE tunnel from Switch A to Switch D.
Figure 23: Network diagram
Table 1: 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:
# Configure Switch A.
<SwitchA> system-view [SwitchA] isis 1 [SwitchA-isis-1] network-entity 00.0005.0000.0000.0001.00 [SwitchA-isis-1] quit [SwitchA] interface vlan-interface 1 [SwitchA-Vlan-interface1] isis enable 1 [SwitchA-Vlan-interface1] quit [SwitchA] interface loopback 0 [SwitchA-LoopBack0] isis enable 1 [SwitchA-LoopBack0] quit
# Configure Switch B.
<SwitchB> system-view [SwitchB] isis 1 [SwitchB-isis-1] network-entity 00.0005.0000.0000.0002.00 [SwitchB-isis-1] quit [SwitchB] interface vlan-interface 1 [SwitchB-Vlan-interface1] isis enable 1 [SwitchB-Vlan-interface1] quit [SwitchB] interface vlan-interface 2 [SwitchB-Vlan-interface2] isis enable 1 [SwitchB-Vlan-interface2] quit [SwitchB] interface loopback 0 [SwitchB-LoopBack0] isis enable 1 [SwitchB-LoopBack0] quit
# Configure Switch C.
<SwitchC> system-view [SwitchC] isis 1 [SwitchC-isis-1] network-entity 00.0005.0000.0000.0003.00 [SwitchC-isis-1] quit [SwitchC] interface vlan-interface 3 [SwitchC-Vlan-interface3] isis enable 1 [SwitchC-Vlan-interface3] quit [SwitchC] interface vlan-interface 2 [SwitchC-Vlan-interface2] isis enable 1 [SwitchC-Vlan-interface2] quit [SwitchC] interface loopback 0 [SwitchC-LoopBack0] isis enable 1 [SwitchC-LoopBack0] quit
# Configure Switch D.
<SwitchD> system-view [SwitchD] isis 1 [SwitchD-isis-1] network-entity 00.0005.0000.0000.0004.00 [SwitchD-isis-1] quit [SwitchD] interface vlan-interface 3 [SwitchD-Vlan-interface3] isis enable 1 [SwitchD-Vlan-interface3] quit [SwitchD] interface loopback 0 [SwitchD-LoopBack0] isis enable 1 [SwitchD-LoopBack0] quit
# Execute the display ip routing-table command on each switch to verify that the switches have learned the routes to one another, including the routes to the loopback interfaces. (Details not shown.)
Configure an LSR ID, and enable MPLS, MPLS TE, and RSVP-TE:
# Configure Switch A.
[SwitchA] mpls lsr-id 1.1.1.9 [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] 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-interface2] quit
# Configure Switch C.
[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] mpls lsr-id 4.4.4.9 [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 an MPLS TE tunnel on Switch A:
# Configure MPLS TE tunnel interface Tunnel 1.
[SwitchA] interface tunnel 1 mode mpls-te [SwitchA-Tunnel1] ip address 7.1.1.1 255.255.255.0
# Specify the tunnel destination address as the LSR ID of Switch D.
[SwitchA-Tunnel1] destination 4.4.4.9
# Configure MPLS TE to use RSVP-TE to establish the tunnel.
[SwitchA-Tunnel1] mpls te signaling rsvp-te [SwitchA-Tunnel1] quit
Configure a static route on Switch A to direct the traffic destined for subnet 30.1.1.0/24 to MPLS TE tunnel 1.
[SwitchA] ip route-static 30.1.1.2 24 tunnel 1 preference 1
Verifying the configuration
# Execute the display interface tunnel command on Switch A. The output shows that the tunnel interface is up.
[SwitchA] display interface tunnel
Tunnel1 current state: UP
Line protocol current state: UP
Description: Tunnel1 Interface
The Maximum Transmit Unit is 64000
Internet Address is 7.1.1.1/24 Primary
Tunnel source unknown, destination 4.4.4.9
Tunnel bandwidth 64 (kbps)
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: 6 bytes/sec, 48 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 drops
177 packets output, 11428 bytes, 0 drops
# Execute the display mpls te tunnel-interface command on Switch A to display detailed information about the MPLS TE tunnel.
[SwitchA] display mpls te tunnel-interface Tunnel Name : Tunnel 1 Tunnel State : Up (Main CRLSP up, Shared-resource CRLSP down) Tunnel Attributes : LSP ID : 23331 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 : SE Tunnel mode : - 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 Backup Bandwidth Flag: Disabled Backup Bandwidth Type: - Backup Bandwidth : - 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 : -
# Execute the display ip routing-table command on Switch A. The output shows a static route entry with interface Tunnel 1 as the output interface.