Figure 8 Generating A Route Table; Figure 9 Generating Alib - Zte ZXR10 8900 Series User Manual

F 8 G
IGURE ENERATING A
Step 2
F 9 G
IGURE ENERATING A
R T
OUTE ABLE
As shown in Figure 9, the routers run LDP to distribute labels.
LIB
As an egress LSR to 47.1.0.0/16, RC distributes a label "40" and
sends it to upstream neighbor RB. This information is recorded in
LIB. When RC receives a message with label "40", it knows that
this message is to 47.1.0.0/16.
When RB receives the binding information of 47.1.0.0/16 and la-
bel "40" from RC, it keeps the label information and receiving in-
terface information in LIB. Meanwhile, RB distributes a label for
47.1.0.0/16 and sends this information to neighbors except the
neighbor connecting to the receiving interface. Suppose that RB
sends a label "50" to RA. Therefore, there is such information in
LIB of RB, as shown below:
IntfIn LabelIn Dest
1 50 47.1.0.0
This information means, when RB receives a message with label
"50" from interface 1, it changes the label to "40" and sends the
message from interface 2. RB does not look up route in its routing
table.
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Chapter 2 MPLS Configuration
IntfOut LabelOut
2 40
11