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Note: You do not actually issue these commands; they represent the behavior automatically performed by the router. |
When the tunnel is established, the JUNOSe software automatically creates an input policy to match the EXP bits and map them to the traffic-class/color combinations and attaches the policy to the incoming segment of the tunnel. The JUNOSe software generates classifier list and policy list names, and creates the policy as if the following commands were entered:
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Note: You do not actually issue these commands; they represent the behavior automatically performed by the router. |
- host1(config)#mpls classifier-list bf-packets
exp 0
- host1(config)#mpls classifier-list af11-packets
exp 1
- host1(config)#mpls classifier-list af12-packets
exp 2
- host1(config)#mpls classifier-list af13-packets
exp 3
- host1(config)#mpls classifier-list af21-packets
exp 4
- host1(config)#mpls classifier-list af22-packets
exp 5
- host1(config)#mpls classifier-list af22-packets
exp 6
- host1(config)#mpls classifier-list ef-packets
exp 7
- host1(config)#mpls policy-list mpls-exp-matching
- host1(config-policy-list)#traffic-class best-effort
classifier-group bf-packets
- host1(config-policy-list)#traffic-class af1
classifier-group af11-packets
- host1(config-policy-list)#traffic-class af1
classifier-group af12-packets
- host1(config-policy-list)#traffic-class af1
classifier-group af13-packets
- host1(config-policy-list)#traffic-class af2
classifier-group af21-packets
- host1(config-policy-list)#traffic-class af2
classifier-group af22-packets
- host1(config-policy-list)#traffic-class af2
classifier-group af23-packets
- host1(config-policy-list)#traffic-class ef
classifier-group ef-packets
- host1(config-policy-list)#color green classifier-group
af11-packets
- host1(config-policy-list)#color green classifier-group
af21-packets
- host1(config-policy-list)#color yellow classifier-group
af12-packets
- host1(config-policy-list)#color yellow classifier-group
af22-packets
- host1(config-policy-list)#color red classifier-group
af13-packets
- host1(config-policy-list)#color red classifier-group
af23-packets
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Note: For a topology-driven LSP, you must configure and apply the classifier list and policy list manually. |
The packets are forwarded to the appropriate fabric queue according to the traffic class/color combination. On a transit router, when the packet is forwarded out of the tunnel, the router-generated output policy then sets the EXP bits back according to the traffic class/color combination. Typically, the effect of the EXP bits to traffic class/color combination to EXP bits is no change.
On an egress router, where the tunnel terminates, no router-generated output policy is attached, and the packets pass out of the router subject to any manually configured IP policy management applied to their traffic class/color combination.
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