Maximum Link Bandwidth and Reservable Bandwidth
In the following example, R1 is the L1 router, R2 is the L1/L2 router enabling MPLS-TE for both Level-1 and Level-2 IS, and R3 is the L2 router. The following configuration is given for R1, R2 & R3.
Figure 15-123: MPLS-TE Topology
R2
#configure terminal | Enter Configure mode. |
(config)#interface eth1 | Specify the interface (eth1) to configure, and enter Interface mode. |
(config-if)#ip address 13.1.1.2/24 | Configure ip address to the interface eth1. |
(config-if)#ip router isis 1 | Enable ISIS on interface eth1. |
(config-if)#isis circuit-type level-1 | Configure ISIS circuit-type as Level-1 |
(config-if)#commit | Commit candidate configuration to the running configuration |
(config-if)#exit | Exit from interface configuration mode. |
(config-if)#interface eth2 | Enter Interface eth2 configure mode. |
(config-if)#ip address 15.1.1.2/24 | Configure ip address to the interface eth2. |
(config-if)#ip router isis 1 | Enable ISIS on interface eth2. |
(config-if)#isis circuit-type level-2 | Configure ISIS circuit-type as Level-2. |
(config-if)#commit | Commit candidate configuration to the running configuration |
(config-if)#exit | Exit from interface configuration mode. |
(config)#router isis 1 | Create an IS-IS routing instance for area 49 (1). |
(config-router)#metric-style wide | Configure the new style of metric type as wide. |
(config-router)#mpls traffic-eng router-id 2.2.2.2 | Configure MPLS-TE unique router-id TLV. |
(config-router)#mpls traffic-eng level-1 | Enable MPLS-TE in is-type Level-1. |
(config-router)#mpls traffic-eng level-2 | Enable MPLS-TE in is-type Level-2. |
(config-router)#net 49.0001.0000.0000.0002.00 | Configure the ISIS net address with area id as: 49.0001 and system id as: 0000.0000.0002. |
(config-router)#commit | Commit candidate configuration to the running configuration |
(config-router)#exit | Exit Router mode. |
(config)#interface eth2 | Enter the interface configure mode. |
(config-if)#bandwidth 1g | Configure Maximum link Bandwidth as 1g bits per second. |
(config-if)#reservable-bandwidth 100m | Specify the maximum reservable bandwidth per interface. |
(config-if)#commit | Commit candidate configuration to the running configuration |
(config-if)#exit | Exit interface configure mode. |
(config)#interface eth1 | Enter the interface configure mode. |
(config-if)#bandwidth 500m | Configure Maximum link Bandwidth as 500m bits per second. |
(config-if)#reservable-bandwidth 200m | Specify the maximum reservable bandwidth per interface. |
(config-if)#commit | Commit candidate configuration to the running configuration |
(config-if)#exit | Exit interface configure mode. |
R1
#configure terminal | Enter Configure mode. |
(config)#interface eth1 | Specify the interface (eth1) to configure, and enter Interface mode. |
(config-if)#ip address 13.1.1.1/24 | Configure ip address to the interface eth1. |
(config-if)#ip router isis 1 | Enable ISIS on interface eth1. |
(config-if)#isis circuit-type level-1 | Configure ISIS circuit-type as Level-1 |
(config-if)#commit | Commit candidate configuration to the running configuration |
(config-if)#exit | Exit from interface configuration mode. |
(config)#router isis 1 | Create an IS-IS routing instance for area 49 (1). |
(config-router)#metric-style wide | Configure the new style of metric type as wide. |
(config-router)#is-type level-1 | Configure IS-Type as Level-1 router. |
(config-router)#mpls traffic-eng router-id 1.1.1.1 | Configure MPLS-TE unique router-id TLV. |
(config-router)#mpls traffic-eng level-1 | Enable MPLS-TE in is-type Level-1. |
(config-router)#net 49.0001.0000.0000.0001.00 | Configure the ISIS net address with area id as: 49.0001 and system-id as: 0000.0000.0001. |
(config-router)#commit | Commit candidate configuration to the running configuration |
(config-router)#exit | Exit Router mode. |
(config)#interface eth1 | Enter the interface configure mode. |
(config-if)#bandwidth 1g | Configure Maximum link Bandwidth as 1g bits per second. |
(config-if)#reservable-bandwidth 100m | Specify the maximum reservable bandwidth per interface. |
(config-if)#commit | Commit candidate configuration to the running configuration |
(config-if)#exit | Exit interface configure mode. |
R3
#configure terminal | Enter Configure mode. |
(config)#interface eth2 | Specify the interface (eth2) to configure, and enter Interface mode. |
(config-if)#ip address 15.1.1.3/24 | Configure ip address to the interface eth1. |
(config-if)#ip router isis 1 | Enable ISIS on interface eth1. |
(config-if)#isis circuit-type level-2 | Configure ISIS circuit-type as Level-1 |
(config-if)#commit | Commit candidate configuration to the running configuration |
(config-if)#exit | Exit from interface configuration mode. |
(config)#router isis 1 | Create an IS-IS routing instance for area 49 (1). |
(config-router)#metric-style wide | Configure the new style of metric type as wide. |
(config-router)#is-type level-2 | Configure IS-Type as Level-2 router. |
(config-router)#mpls traffic-eng router-id 3.3.3.3 | Configure MPLS-TE unique router-id TLV. |
(config-router)#mpls traffic-eng level-2 | Enable MPLS-TE in is-type Level-2. |
(config-router)#net 49.0001.0000.0000.0003.00 | Configure the ISIS net address with area id as: 49.0001 and system-id as: 0000.0000.0003. |
(config-router)#commit | Commit candidate configuration to the running configuration |
(config-router)#exit | Exit Router mode. |
(config)#interface eth2 | Enter the interface configure mode. |
(config-if)#bandwidth 1g | Configure Maximum link Bandwidth as 1g bits per second. |
(config-if)#reservable-bandwidth 100m | Specify the maximum reservable bandwidth per interface. |
(config-if)#commit | Commit candidate configuration to the running configuration |
(config-if)#exit | Exit interface configure mode. |
Validation
R2
Check the output of “show clns neighbors” to verify that ISIS adjacency is up.
#show clns neighbors
Total number of L1 adjacencies: 2
Total number of L2 adjacencies: 1
Total number of adjacencies: 3
Tag 1: VRF : default
System Id Interface SNPA State Holdtime Type Protocol
0000.0000.0001 eth1 5254.003d.2123 Up 6 L1 IS-IS
0000.0000.0003 eth2 5254.00fa.54d5 Up 6 L1 IS-IS
Up 6 L2 IS-IS
Check the output of “show isis database level-1 verbose” to verify that LSP does have configured Max Link Bandwidth and Reservable Bandwidth.
R2#show isis database level-1 verbose
Tag 1: VRF : default
IS-IS Level-1 Link State Database:
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
0000.0000.0001.00-00 0x00000007 0xA4DF 1135 0/0/0
Area Address: 49.0001
NLPID: 0xCC
IP Address: 13.1.1.1
Router ID: 1.1.1.1
Metric: 10 IS-Extended 0000.0000.0001.01
IPv4 Interface Address: 13.1.1.1
Neighbor IP Address: 13.1.1.1
Maximum Link Bandwidth : 1000000.00 kbits/sec
Reservable Bandwidth : 100000.00 kbits/sec
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 100000.00 kbits/sec
Unreserved Bandwidth at priority 1: 100000.00 kbits/sec
Unreserved Bandwidth at priority 2: 100000.00 kbits/sec
Unreserved Bandwidth at priority 3: 100000.00 kbits/sec
Unreserved Bandwidth at priority 4: 100000.00 kbits/sec
Unreserved Bandwidth at priority 5: 100000.00 kbits/sec
Unreserved Bandwidth at priority 6: 100000.00 kbits/sec
Unreserved Bandwidth at priority 7: 100000.00 kbits/sec
TE-Default Metric: 10
Metric: 10 IP-Extended 13.1.1.0/24
Metric: 10 IP-Extended 1.1.1.1/32
0000.0000.0001.01-00 0x00000004 0x8B3C 683 0/0/0
Metric: 0 IS-Extended 0000.0000.0001.00
Metric: 0 IS-Extended 0000.0000.0002.00
0000.0000.0002.00-00* 0x0000000E 0x3961 1069 0/0/0
Area Address: 49.0001
NLPID: 0xCC
IP Address: 13.1.1.2
Router ID: 2.2.2.2
Metric: 10 IS-Extended 0000.0000.0001.01
IPv4 Interface Address: 13.1.1.2
Neighbor IP Address: 13.1.1.1
Maximum Link Bandwidth : 500000.00 kbits/sec
Reservable Bandwidth : 200000.00 kbits/sec
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 200000.00 kbits/sec
Unreserved Bandwidth at priority 1: 200000.00 kbits/sec
Unreserved Bandwidth at priority 2: 200000.00 kbits/sec
Unreserved Bandwidth at priority 3: 200000.00 kbits/sec
Unreserved Bandwidth at priority 4: 200000.00 kbits/sec
Unreserved Bandwidth at priority 5: 200000.00 kbits/sec
Unreserved Bandwidth at priority 6: 200000.00 kbits/sec
Unreserved Bandwidth at priority 7: 200000.00 kbits/sec
TE-Default Metric: 10
Metric: 10 IS-Extended 0000.0000.0003.02
IPv4 Interface Address: 15.1.1.2
Neighbor IP Address: 15.1.1.3
Maximum Link Bandwidth : 1000000.00 kbits/sec
Reservable Bandwidth : 100000.00 kbits/sec
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 100000.00 kbits/sec
Unreserved Bandwidth at priority 1: 100000.00 kbits/sec
Unreserved Bandwidth at priority 2: 100000.00 kbits/sec
Unreserved Bandwidth at priority 3: 100000.00 kbits/sec
Unreserved Bandwidth at priority 4: 100000.00 kbits/sec
Unreserved Bandwidth at priority 5: 100000.00 kbits/sec
Unreserved Bandwidth at priority 6: 100000.00 kbits/sec
Unreserved Bandwidth at priority 7: 100000.00 kbits/sec
TE-Default Metric: 10
Metric: 10 IP-Extended 2.2.2.0/24
Metric: 10 IP-Extended 13.1.1.0/24
Metric: 10 IP-Extended 15.1.1.0/24
0000.0000.0003.00-00 0x0000000A 0x4C9C 437 0/0/0
Area Address: 49.0001
NLPID: 0xCC
IP Address: 15.1.1.3
Router ID: 3.3.3.3
Metric: 10 IS-Extended 0000.0000.0003.02
Metric: 10 IP-Extended 3.3.3.3/32
Metric: 10 IP-Extended 15.1.1.0/24
0000.0000.0003.02-00 0x00000001 0x8C39 437 0/0/0
Metric: 0 IS-Extended 0000.0000.0003.00
Metric: 0 IS-Extended 0000.0000.0002.00
Check the output of “show isis database level-2 verbose” to verify that LSP does have configured Max Link Bandwidth and Reservable Bandwidth.
R2#show isis database level-2 verbose
Tag 1: VRF : default
IS-IS Level-2 Link State Database:
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
0000.0000.0002.00-00* 0x00000014 0x8C1A 1012 0/0/0
Area Address: 49.0001
NLPID: 0xCC
IP Address: 15.1.1.2
Router ID: 2.2.2.2
Metric: 10 IS-Extended 0000.0000.0003.02
IPv4 Interface Address: 15.1.1.2
Neighbor IP Address: 15.1.1.3
Maximum Link Bandwidth : 1000000.00 kbits/sec
Reservable Bandwidth : 100000.00 kbits/sec
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 100000.00 kbits/sec
Unreserved Bandwidth at priority 1: 100000.00 kbits/sec
Unreserved Bandwidth at priority 2: 100000.00 kbits/sec
Unreserved Bandwidth at priority 3: 100000.00 kbits/sec
Unreserved Bandwidth at priority 4: 100000.00 kbits/sec
Unreserved Bandwidth at priority 5: 100000.00 kbits/sec
Unreserved Bandwidth at priority 6: 100000.00 kbits/sec
Unreserved Bandwidth at priority 7: 100000.00 kbits/sec
TE-Default Metric: 10
Metric: 20 IP-Extended 1.1.1.1/32
Metric: 10 IP-Extended 15.1.1.0/24
Metric: 10 IP-Extended 13.1.1.0/24
Metric: 20 IP-Extended 3.3.3.3/32
Metric: 10 IP-Extended 2.2.2.0/24
0000.0000.0003.00-00 0x0000000D 0x7B17 1006 0/0/0
Area Address: 49.0001
NLPID: 0xCC
IP Address: 15.1.1.3
Router ID: 3.3.3.3
Metric: 10 IS-Extended 0000.0000.0003.02
IPv4 Interface Address: 15.1.1.3
Neighbor IP Address: 15.1.1.3
Maximum Link Bandwidth : 1000000.00 kbits/sec
Reservable Bandwidth : 100000.00 kbits/sec
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 100000.00 kbits/sec
Unreserved Bandwidth at priority 1: 100000.00 kbits/sec
Unreserved Bandwidth at priority 2: 100000.00 kbits/sec
Unreserved Bandwidth at priority 3: 100000.00 kbits/sec
Unreserved Bandwidth at priority 4: 100000.00 kbits/sec
Unreserved Bandwidth at priority 5: 100000.00 kbits/sec
Unreserved Bandwidth at priority 6: 100000.00 kbits/sec
Unreserved Bandwidth at priority 7: 100000.00 kbits/sec
TE-Default Metric: 10
Metric: 10 IP-Extended 3.3.3.3/32
Metric: 10 IP-Extended 15.1.1.0/24
Metric: 30 IP-Extended 1.1.1.1/32
Metric: 20 IP-Extended 13.1.1.0/24
Metric: 20 IP-Extended 2.2.2.0/24
0000.0000.0003.02-00 0x00000001 0x8C39 375 0/0/0
Metric: 0 IS-Extended 0000.0000.0003.00
Metric: 0 IS-Extended 0000.0000.0002.00
R1
Check the output of “show clns neighbors” to verify that ISIS adjacency is up.
#show clns neighbors
Total number of L1 adjacencies: 1
Total number of L2 adjacencies: 0
Total number of adjacencies: 1
Tag 1: VRF : default
System Id Interface SNPA State Holdtime Type Protocol
0000.0000.0002 eth1 5254.0028.3734 Up 24 L1 IS-IS
Check the output of “show isis database level-1 verbose” to verify that LSP does have configured Max Link Bandwidth and Reservable Bandwidth.
R1#show isis database level-1 verbose
Tag 1: VRF : default
IS-IS Level-1 Link State Database:
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL PDU Length
0000.0000.0001.00-00* 0x00000006 0xA6DE 331 0/0/0 143
Area Address: 49.0001
NLPID: 0xCC
IP Address: 13.1.1.1
Router ID: 1.1.1.1
Metric: 10 IS-Extended 0000.0000.0001.01
IPv4 Interface Address: 13.1.1.1
Neighbor IP Address: 13.1.1.1
Maximum Link Bandwidth : 1000000.00 kbits/sec
Reservable Bandwidth : 100000.00 kbits/sec
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 100000.00 kbits/sec
Unreserved Bandwidth at priority 1: 100000.00 kbits/sec
Unreserved Bandwidth at priority 2: 100000.00 kbits/sec
Unreserved Bandwidth at priority 3: 100000.00 kbits/sec
Unreserved Bandwidth at priority 4: 100000.00 kbits/sec
Unreserved Bandwidth at priority 5: 100000.00 kbits/sec
Unreserved Bandwidth at priority 6: 100000.00 kbits/sec
Unreserved Bandwidth at priority 7: 100000.00 kbits/sec
TE-Default Metric: 10
Metric: 10 IP-Extended 13.1.1.0/24
Metric: 10 IP-Extended 1.1.1.1/32
0000.0000.0001.01-00* 0x00000004 0x8B3C 780 0/0/0 51
Metric: 0 IS-Extended 0000.0000.0001.00
Metric: 0 IS-Extended 0000.0000.0002.00
0000.0000.0002.00-00 0x0000000E 0x3961 1164 0/0/0 224
Area Address: 49.0001
NLPID: 0xCC
IP Address: 13.1.1.2
Router ID: 2.2.2.2
Metric: 10 IS-Extended 0000.0000.0001.01
IPv4 Interface Address: 13.1.1.2
Neighbor IP Address: 13.1.1.1
Maximum Link Bandwidth : 500000.00 kbits/sec
Reservable Bandwidth : 200000.00 kbits/sec
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 200000.00 kbits/sec
Unreserved Bandwidth at priority 1: 200000.00 kbits/sec
Unreserved Bandwidth at priority 2: 200000.00 kbits/sec
Unreserved Bandwidth at priority 3: 200000.00 kbits/sec
Unreserved Bandwidth at priority 4: 200000.00 kbits/sec
Unreserved Bandwidth at priority 5: 200000.00 kbits/sec
Unreserved Bandwidth at priority 6: 200000.00 kbits/sec
Unreserved Bandwidth at priority 7: 200000.00 kbits/sec
TE-Default Metric: 10
Metric: 10 IS-Extended 0000.0000.0003.02
IPv4 Interface Address: 15.1.1.2
Neighbor IP Address: 15.1.1.3
Maximum Link Bandwidth : 1000000.00 kbits/sec
Reservable Bandwidth : 100000.00 kbits/sec
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 100000.00 kbits/sec
Unreserved Bandwidth at priority 1: 100000.00 kbits/sec
Unreserved Bandwidth at priority 2: 100000.00 kbits/sec
Unreserved Bandwidth at priority 3: 100000.00 kbits/sec
Unreserved Bandwidth at priority 4: 100000.00 kbits/sec
Unreserved Bandwidth at priority 5: 100000.00 kbits/sec
Unreserved Bandwidth at priority 6: 100000.00 kbits/sec
Unreserved Bandwidth at priority 7: 100000.00 kbits/sec
TE-Default Metric: 10
Metric: 10 IP-Extended 2.2.2.0/24
Metric: 10 IP-Extended 13.1.1.0/24
Metric: 10 IP-Extended 15.1.1.0/24
0000.0000.0003.00-00 0x0000000A 0x4C9C 533 0/0/0 80
Area Address: 49.0001
NLPID: 0xCC
IP Address: 15.1.1.3
Router ID: 3.3.3.3
Metric: 10 IS-Extended 0000.0000.0003.02
Metric: 10 IP-Extended 3.3.3.3/32
Metric: 10 IP-Extended 15.1.1.0/24
0000.0000.0003.02-00 0x00000001 0x8C39 533 0/0/0 51
Metric: 0 IS-Extended 0000.0000.0003.00
Metric: 0 IS-Extended 0000.0000.0002.00
R3
Check the output of “show clns neighbors” to verify that ISIS adjacency is up.
#show clns neighbors
Total number of L1 adjacencies: 1
Total number of L2 adjacencies: 1
Total number of adjacencies: 2
Tag 1: VRF : default
System Id Interface SNPA State Holdtime Type Protocol
0000.0000.0002 eth2 5254.00d4.2c13 Up 20 L1 IS-IS
Up 20 L2 IS-IS
Check the output of “show isis database level-2 verbose” to verify that LSP does have configured Max Link Bandwidth and Reservable Bandwidth.
R3#show isis database level-2 verbose
Tag 1: VRF : default
IS-IS Level-2 Link State Database:
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
0000.0000.0002.00-00 0x00000010 0xA4E5 942 0/0/0
Area Address: 49.0001
NLPID: 0xCC
IP Address: 6.6.6.6
Router ID: 2.2.2.2
Metric: 10 IS-Extended 0000.0000.0003.02
IPv4 Interface Address: 15.1.1.2
Neighbor IP Address: 15.1.1.3
Maximum Link Bandwidth : 1000000.00 kbits/sec
Reservable Bandwidth : 100000.00 kbits/sec
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 100000.00 kbits/sec
Unreserved Bandwidth at priority 1: 100000.00 kbits/sec
Unreserved Bandwidth at priority 2: 100000.00 kbits/sec
Unreserved Bandwidth at priority 3: 100000.00 kbits/sec
Unreserved Bandwidth at priority 4: 100000.00 kbits/sec
Unreserved Bandwidth at priority 5: 100000.00 kbits/sec
Unreserved Bandwidth at priority 6: 100000.00 kbits/sec
Unreserved Bandwidth at priority 7: 100000.00 kbits/sec
TE-Default Metric: 10
Metric: 10 IP-Extended 6.6.6.6/32
Metric: 10 IP-Extended 15.1.1.0/24
Metric: 10 IP-Extended 13.1.1.0/24
Metric: 20 IP-Extended 1.1.1.1/32
Metric: 20 IP-Extended 3.3.3.3/32
0000.0000.0003.00-00* 0x0000000B 0xF286 950 0/0/0
Area Address: 49.0001
NLPID: 0xCC
IP Address: 15.1.1.3
Router ID: 3.3.3.3
Metric: 10 IS-Extended 0000.0000.0003.02
IPv4 Interface Address: 15.1.1.3
Neighbor IP Address: 15.1.1.3
Maximum Link Bandwidth : 1000000.00 kbits/sec
Reservable Bandwidth : 100000.00 kbits/sec
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 100000.00 kbits/sec
Unreserved Bandwidth at priority 1: 100000.00 kbits/sec
Unreserved Bandwidth at priority 2: 100000.00 kbits/sec
Unreserved Bandwidth at priority 3: 100000.00 kbits/sec
Unreserved Bandwidth at priority 4: 100000.00 kbits/sec
Unreserved Bandwidth at priority 5: 100000.00 kbits/sec
Unreserved Bandwidth at priority 6: 100000.00 kbits/sec
Unreserved Bandwidth at priority 7: 100000.00 kbits/sec
TE-Default Metric: 10
Metric: 10 IP-Extended 3.3.3.3/32
Metric: 10 IP-Extended 15.1.1.0/24
Metric: 30 IP-Extended 1.1.1.1/32
Metric: 20 IP-Extended 6.6.6.6/32
Metric: 20 IP-Extended 13.1.1.0/24
0000.0000.0003.02-00* 0x00000001 0x8C39 939 0/0/0
Metric: 0 IS-Extended 0000.0000.0003.00
Metric: 0 IS-Extended 0000.0000.0002.00
Last modified date: 08/28/2023