Example 29 Atm Vc Table on a Router Operating in Cell Mode

gsr4#show

atm vc

VCD /

Peak Avg/Min

Burst

Interface

Name

VPI

VCI

Type

Encaps

Kbps

Kbps

Cells

Sts

5/0.

, 1

84

1

61

TVC

MUX

622000

622000

UP

5/0.

, 1

85

1

62

TVC

MUX

622000

622000

UP

5/0.

1

86

1

63

TVC

MUX

622000

622000

UP

5/0.

1

87

1

64

TVC

MUX

622000

622000

UP

5/0.

1

88

1

65

TVC

MUX

622000

622000

UP

5/0.

1

89

1

66

TVC

MUX

622000

622000

UP

5/0.

1

90

1

67

TVC

MUX

622000

622000

UP

5/0.

1

91

1

68

TVC

MUX

622000

622000

UP

5/0.

1

92

1

69

TVC

MUX

622000

622000

1 70 TVC MUX 622000 622000

1 71 TVC MUX 622000 622000

UP UP

The highlighted text in Example 2-9 shows the MPLS control VC being set up on VPI/VCI 0/32. The others that show up as TVCs are tag VCs (also called Label Virtual Circuits [LVCs]) that are set up as a result of the label binding exchange that occurs on the control VC. A TVC is used to transport the data cells that make up an MPLS packet.

Example 2-10 is from an ATM switch (LS1010) that is connected to ATM5/0 of gsr4 from Example 29. The output from the LS1010 ATM switch is similar to that of gsr4. Again, the control VC setup on VPI/VCI 0/32 is highlighted.

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