
Understanding MPLS
305754-A Rev 00
1-5
The MPLS Network
The MPLS network (Figure 1-2) consists of two major components:
• Label switching router (LSR)
• Label edge router (LER)
Figure 1-2. Sample MPLS Network
ATM0057A
Label-switching router (LSR)
Key
Label edge router (LER)
10BASE-T
100BASE-T
LER
LER
LER
LER
100BASE-T
100BASE-T
MPLS network
Virtual connection
10BASE-T
100BASE-T
LSR
LSR
LSR
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