Manual:Interface/Traffic Engineering: Difference between revisions
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|desc=If enabled, the sender node will receive information about the actual route that the LSP tunnel traverses. | |desc=If enabled, the sender node will receive information about the actual route that the LSP tunnel traverses. Record Route is analogous to a path vector, and hence can be used for loop detection. | ||
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Revision as of 09:03, 22 March 2010
Applies to RouterOS: v3, v4
Summary
Properties
Sub-menu: /interface traffic-eng
| Property | Description |
|---|---|
| affinity-exclude (integer; Default: ) | Do not use interface if resource-class matches any of specified bits. |
| affinity-include-all (integer; Default: ) | Use interface only if resource-class matches all of specified bits. |
| affinity-include-any (integer; Default: ) | Use interface if resource-class matches any of specified bits. |
| auto-bandwidth-avg-interval (time; Default: 5m) | Interval in which actual amount of data is measured, from which average bandwidth is calculated. |
| auto-bandwidth-range (Disabled | Min[bps][-Max[bps]]; Default: 0bps) | Auto bandwidth adjustment range. Read more >> |
| auto-bandwidth-reserve (integer[%]; Default: 0%) | Specifies percentage of additional bandwidth to reserve. Read more >> |
| auto-bandwidth-update-interval (time; Default: 1h) | Interval during which tunnel keeps track of highest average rate. |
| bandwidth (integer[bps]; Default: 0bps) | How much bandwidth to reserve for TE tunnel. Value is in bits per second. Read more >> |
| bandwidth-limit (disabled | integer[%]; Default: disabled) | Defines actual bandwidth limitation of TE tunnel. Limit is configured in percent of specified tunnel bandwidth. Read more >> |
| comment (string; Default: ) | Short description of the item |
| disable-running-check (yes | no; Default: no) | Specifies whether to detect if interface is running or not. If set to no interface will always have running flag. |
| disabled (yes | no; Default: yes) | Defines whether item is ignored or used. |
| from-address (auto | IP; Default: auto) | Ingress address of the tunnel. If set to auto least IP address is picked. |
| holding-priority (integer [0..7]; Default: ) | Is used to decide whether this session can be preempted by another session. 0 sets the highest priority. |
| mtu (integer; Default: ) | |
| name (string; Default: ) | Name of the interface |
| primary-path (string; Default: ) | Primary label switching paths defined in /mpls traffic-eng tunnel-path menu. |
| primary-retry-interval (time; Default: 1m) | Interval after which tunnel will try to use primary path. |
| record-route (yes | no; Default: ) | If enabled, the sender node will receive information about the actual route that the LSP tunnel traverses. Record Route is analogous to a path vector, and hence can be used for loop detection. |
| reoptimize-interval (time; Default: ) | Interval after which tunnel will re-optimize current path. If current path is not the best path then after optimization best path will be used. Read more >> |
| secondary-path (string[,string]; Default: ) | List of label switching paths used by TE tunnel if primary path fails. Paths are defined in /mpls traffic-eng tunnel-path menu. |
| setup-priority (integer[0..7]; Default: ) | Parameter is used to decide whether this session can preempt another session. 0 sets the highest priority. |
| to-address (IP; Default: 0.0.0.0) | Remote end of TE tunnel. |
Monitoring
To verify TE tunnel's status monitor command can be used.
[admin@R3] /interface traffic-eng> monitor 0
tunnel-id: 12
primary-path-state: on-hold
secondary-path-state: established
secondary-path: static
active-path: static
active-lspid: 3
active-label: 66
explicit-route: "S:192.168.55.10/32,L:192.168.55.13/32,L:192.168.55.17/32"
recorded-route: "192.168.55.13[66],192.168.55.17[59],192.168.55.18[3]"
reserved-bandwidth: 5.0Mbps
Reoptimization
Path can be re-optimized manually by entering following command /interface traffic-eng reoptimize [id].
Lets say TE tunnel chose another path after link failure on best path. You can verify optimization by looking at explicit-route or recorded-route if record-route parameter is enabled.
[admin@R3] /interface traffic-eng> monitor 0
tunnel-id: 12
primary-path-state: established
primary-path: dyn
secondary-path-state: not-necessary
active-path: dyn
active-lspid: 1
active-label: 67
explicit-route: "S:192.168.55.10/32,S:192.168.55.13/32,S:192.168.55.14/32,
S:192.168.55.17/32,S:192.168.55.18/32"
recorded-route: "192.168.55.13[67],192.168.55.17[60],192.168.55.18[3]"
reserved-bandwidth: 5.0Mbps
Whenever the link comes back, TE tunnel will use the same path even it is not the best path (unless reoptimize-interval is configured). To fix it we can manually reoptimize tunnel path.
[admin@R3] /interface traffic-eng> reoptimize 0
[admin@R3] /interface traffic-eng> monitor 0
tunnel-id: 12
primary-path-state: established
primary-path: dyn
secondary-path-state: not-necessary
active-path: dyn
active-lspid: 2
active-label: 81
explicit-route: "S:192.168.55.5/32,S:192.168.55.2/32,S:192.168.55.1/32"
recorded-route: "192.168.55.2[81],192.168.55.1[3]"
reserved-bandwidth: 5.0Mbps
Notice how explicit-route and recorded-route changed to shorter path.
See Also
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