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Beta Draft Confidential
About ATM Logical Ports
VPs and VCs
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
1/19/05
2-15
Table 2-4.
Number of Valid Bits in VPI/VCI for GX 550
If Number of Valid
VPI Bits =
a
a
Only 8 bits of the VPI are available on UNI type interfaces per ATM Forum standards.
Valid VPI Range
Is
If Number of
Valid VCI Bits =
Valid VCI Range
Is
b
b
VCI 0 - 31 are reserved and should not be used for user traffic per ATM Forum standards.
0
0
0
Not Valid
1
0 - 1
1
Not Valid
2
0 - 3
2
Not Valid
3
0 - 7
3
Not Valid
4
0 - 15
4
Not Valid
5
0 - 31
5
Not Valid
6
0 - 63
6
32 - 63
7
0 - 127
7
32 - 127
8
0 - 255
8
32 - 255
9
0 – 511
9
32 - 511
10
0 – 1023
10
32 - 1023
11
0 – 2047
11
32 - 2047
12
0 – 4095
12
32 - 4095
Not Valid
–
13
32 - 8191
Содержание CBX 3500
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