Establishing an inter-area MPLS TE tunnel over a CRLSP calculated by PCEs
Network requirements
Switch A, Switch B, Switch C, and Switch D support MPLS TE and run OSPF.
Configure Switch A and Switch B as PCEs, and configure Switch C as a PCC to automatically discover the PCEs.
Establish an MPLS TE tunnel over a CRLSP from Switch C to Switch D that uses the inter-area path calculated by PCEs.
Figure 32: Network diagram
Configuration procedure
Configure IP addresses and masks for interfaces. (Details not shown.)
Configure OSPF to advertise interface addresses and configure OSPF TE:
# Configure Switch A.
<SwitchA> system-view [SwitchA] ospf [SwitchA-ospf-1] area 0 [SwitchA-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255 [SwitchA-ospf-1-area-0.0.0.0] network 1.1.1.1 0.0.0.0 [SwitchA-ospf-1-area-0.0.0.0] mpls te enable [SwitchA-ospf-1-area-0.0.0.0] quit [SwitchA-ospf-1] area 1 [SwitchA-ospf-1-area-0.0.0.1] network 10.2.1.0 0.0.0.255 [SwitchA-ospf-1-area-0.0.0.1] mpls te enable [SwitchA-ospf-1-area-0.0.0.1] quit [SwitchA-ospf-1] quit
# Configure Switch B.
<SwitchB> system-view [SwitchB] ospf [SwitchB-ospf-1] area 0 [SwitchB-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255 [SwitchB-ospf-1-area-0.0.0.0] network 2.2.2.2 0.0.0.0 [SwitchB-ospf-1-area-0.0.0.0] mpls te enable [SwitchB-ospf-1-area-0.0.0.0] quit [SwitchB-ospf-1] area 2 [SwitchB-ospf-1-area-0.0.0.2] network 10.3.1.0 0.0.0.255 [SwitchB-ospf-1-area-0.0.0.2] mpls te enable [SwitchB-ospf-1-area-0.0.0.2] quit [SwitchB-ospf-1] quit
# Configure Switch C.
<SwitchC> system-view [SwitchC] ospf [SwitchC-ospf-1] area 1 [SwitchC-ospf-1-area-0.0.0.1] network 10.2.1.0 0.0.0.255 [SwitchC-ospf-1-area-0.0.0.1] network 3.3.3.3 0.0.0.0 [SwitchC-ospf-1-area-0.0.0.1] mpls te enable [SwitchC-ospf-1-area-0.0.0.1] quit [SwitchC-ospf-1] quit
# Configure Switch D.
<SwitchD> system-view [SwitchD] ospf [SwitchD-ospf-1] area 2 [SwitchD-ospf-1-area-0.0.0.2] network 10.3.1.0 0.0.0.255 [SwitchD-ospf-1-area-0.0.0.2] network 4.4.4.4 0.0.0.0 [SwitchD-ospf-1-area-0.0.0.2] mpls te enable [SwitchD-ospf-1-area-0.0.0.2] quit [SwitchD-ospf-1] quit
Configure an LSR ID, and enable MPLS, MPLS TE, and RSVP-TE:
# Configure Switch A.
[SwitchA] mpls lsr-id 1.1.1.1 [SwitchA] mpls te [SwitchA-te] quit [SwitchA] rsvp [SwitchA-rsvp] quit [SwitchA] interface vlan-interface 10 [SwitchA-Vlan-interface10] mpls enable [SwitchA-Vlan-interface10] mpls te enable [SwitchA-Vlan-interface10] rsvp enable [SwitchA-Vlan-interface10] quit [SwitchA] interface vlan-interface 11 [SwitchA-Vlan-interface11] mpls enable [SwitchA-Vlan-interface11] mpls te enable [SwitchA-Vlan-interface11] rsvp enable [SwitchA-Vlan-interface11] quit
# Configure Switch B.
[SwitchB] mpls lsr-id 2.2.2.2 [SwitchB] mpls te [SwitchB-te] quit [SwitchB] rsvp [SwitchB-rsvp] quit [SwitchB] interface vlan-interface 10 [SwitchB-Vlan-interface10] mpls enable [SwitchB-Vlan-interface10] mpls te enable [SwitchB-Vlan-interface10] rsvp enable [SwitchB-Vlan-interface10] quit [SwitchB] interface vlan-interface 11 [SwitchB-Vlan-interface11] mpls enable [SwitchB-Vlan-interface11] mpls te enable [SwitchB-Vlan-interface11] rsvp enable [SwitchB-Vlan-interface11] quit
# Configure Switch C.
[SwitchC] mpls lsr-id 3.3.3.3 [SwitchC] mpls te [SwitchC-te] quit [SwitchC] rsvp [SwitchC-rsvp] quit [SwitchC] interface vlan-interface 11 [SwitchC-Vlan-interface11] mpls enable [SwitchC-Vlan-interface11] mpls te enable [SwitchC-Vlan-interface11] rsvp enable [SwitchC-Vlan-interface11] quit
# Configure Switch D.
[SwitchD] mpls lsr-id 4.4.4.4 [SwitchD] mpls te [SwitchD-te] quit [SwitchD] rsvp [SwitchD-rsvp] quit [SwitchD] interface vlan-interface 11 [SwitchD-Vlan-interface11] mpls enable [SwitchD-Vlan-interface11] mpls te enable [SwitchD-Vlan-interface11] rsvp enable [SwitchD-Vlan-interface11] quit
Configure Switch A and Switch B as PCEs:
# Configure Switch A.
[SwitchA] mpls te [SwitchA-te] pce address 1.1.1.1
# Configure Switch B.
[SwitchB] mpls te [SwitchB-te] pce address 2.2.2.2
Configure Switch C as a PCC to use the path calculated by PCEs:
# Configure MPLS TE tunnel interface Tunnel 1.
[SwitchC] interface tunnel 1 mode mpls-te [SwitchC-Tunnel1] ip address 7.1.1.1 255.255.255.0
# Specify the tunnel destination address as the LSR ID of Switch D.
[SwitchC-Tunnel1] destination 4.4.4.4
# Configure MPLS TE to use RSVP-TE to establish the tunnel.
[SwitchC-Tunnel1] mpls te signaling rsvp-te
# Assign 2000 kbps bandwidth to the tunnel.
[SwitchC-Tunnel1] mpls te bandwidth 2000
# Configure the tunnel to use the path calculated by PCEs.
[SwitchC-Tunnel1] mpls te path preference 2 dynamic pce 1.1.1.1 2.2.2.2 [SwitchC-Tunnel1] quit
Verifying the configuration
# Display discovered PCE information on each switch. This example uses Switch A.
[SwitchA] display mpls te pce discovery verbose
PCE address: 2.2.2.2
Discovery methods: OSPF
Path scopes:
Path scope Preference
Compute intra-area paths 7
Act as PCE for inter-area TE LSP computation 6
Act as a default PCE for inter-area TE LSP computation 6
Capabilities:
Bidirectional path computation
Support for request prioritization
Support for multiple requests per message
Domains:
OSPF 1 area 0.0.0.0
OSPF 1 area 0.0.0.2
# Verify that PCEP sessions have been established on each switch. This example uses Switch A.
[SwitchA] display mpls te pce peer verbose
Peer address: 2.2.2.2
TCP connection : 1.1.1.1:29507 -> 2.2.2.2:4189
Peer type : PCE
Session type : Stateless
Session state : UP
Mastership : Normal
Role : Active
Session up time : 0000 days 00 hours 00 minutes
Session ID : Local 0, Peer 0
Keepalive interval : Local 30 sec, Peer 30 sec
Recommended DeadTimer : Local 120 sec, Peer 120 sec
Tolerance:
Min keepalive interval: 10 sec
Max unknown messages : 5
Request timeout : 10 sec
Delegation timeout : 30 sec
Peer address: 3.3.3.3
TCP connection : 3.3.3.3:29507 -> 1.1.1.1:4189
Peer type : PCC
Session type : Stateless
Session state : UP
Mastership : Normal
Role : Active
Session up time : 0000 days 00 hours 00 minutes
Session ID : Local 2, Peer 0
Keepalive interval : Local 30 sec, Peer 30 sec
Recommended DeadTimer : Local 120 sec, Peer 120 sec
Tolerance:
Min keepalive interval: 10 sec
Max unknown messages : 5
Request timeout : 10 sec
Delegation timeout : 30 sec