MPLS TE Traffic Engineering Path selection principle and configuration template for CISCO

Mpls–te:

1, about TE Flow engineering background Knowledge Introduction:

Why is there a te flow of engineering production?
In the real production network, IGP often some fatal restrictions, such as OSPF is based on cost to select the path, the cost of the smaller the more priority. But sometimes the smaller the cost, does not mean that the link load is small. For example, there is a link is 100M, with 99M, there is another link is E1, with less than 500K, then the E1 link is actually better than the 100M link. Because the available bandwidth is nearly 1.5M. What kind of way will you use to control the path selection at this time? Pbr? Access list?

Seems to be not so easy and feasible.

Mpls–te provides an effective and practical way to do this. A set of MPLS OAM Maintenance guidelines are also provided.

2, about configuration order and logic

1, Global below:

MPLS Traffic-eng Tunnels

All interfaces are as follows:

MPLS Traffic-eng Tunnels

IP RSVP Bandwidth 2048

2, OSPF process below:--> Flow engineering Router-id and traffic engineering area

MPLS Traffic-eng Router-id Loopback0

MPLS Traffic-eng Area 0

3, establish tunnel

Interface Tunnel0

IP unnumbered Loopback0

Tunnel mode MPLS Traffic-eng

Tunnel Destination 10.1.1.2

Tunnel MPLS Traffic-eng Priority 7 7

This column more highlights: http://www.bianceng.cn/Network/basis/

Tunnel MPLS Traffic-eng Bandwidth 1024--> My physical interface is 2M, where n multiple tunnels to share the bandwidth of a physical interface, so it is less than the bandwidth that is equal to the physical interface.

Tunnel MPLS Traffic-eng path-option 1 dynamic

No routing dynamic

End

4, IP traffic is introduced into TE. If there is no such step, that is to deny all the configuration above, because the real data traffic is not through the Te tunnel forwarding, the purpose of the configuration te where? J

There are several ways:

Static Introduction: IP route 10.1.1.2 255.255.255.255 Tunnel0

Dynamic calculation:

Under Tunnel x:

Tunnel MPLS Traffic-eng Autoroute announce

Here's the basic principle of Te Flow engineering for path selection:

3, configure the typical configuration of MPLS te: