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Cisco ASR 9000 Series 구성
Information About Configuring Channelized SONET/SDH
An administrative unit (AU) is the information structure that provides adaptation between the
higher-order path layer and the multiplex section layer. It consists of an information payload (the
higher-order virtual container) and an administrative unit pointer, which indicates the offset of the
payload frame start relative to the multiplex section frame start.
An AU can be channelized into tributary units (TUs) and tributary unit groups (TUGs).
An administrative unit 4 (AU-4) consists of three STM-1s or an STM-3.
An administrative unit 3 (AU-3) consists of one STM-1.
An administrative unit group (AUG) consists of one or more administrative units occupying fixed,
defined positions in an STM payload.
Table 2
SONET Term
SONET
STS-3c
STS-1
VT
SPE
Section
Line
Path
On the Cisco ASR 9000 Series Router, the following levels of SDH channelization are supported:
1-Port Channelized OC-3/STM-1 SPA
•
–
–
–
–
•
2-Port Channelized OC-12/DS0 SPA
–
–
–
–
–
–
–
–
–
–
–
Cisco ASR 9000 Aggregation Services Router Interfaces and Hardware Component Configuration Guide
HC-324
SONET and SDH Terminology Equivalencies
SDH Term
SDH
AU-4
AU-3
TU
VC
Regenerator Section
Multiplex Section
Path
AU4 to TUG-3 to TUG-2 to VC-12 to E1 to NxDS0
AU4 to TUG-3 to VC-3 to DS3 (Clear Channel)
AU4 to TUG-3 to VC-3 to E3 (Clear Channel)
AU3 to TUG-2 to VC-11 to DS1 to NxDS0
AU-4-4c (VC-4-4c)
AU-4 (VC-4)
AU-4 to TUG-3 to VC-3 to DS3
AU-4 to TUG-3 to VC-3 to E3
AU-4 to TUG-3 to TUG-2 to VC-11 to T1 to NxDS0
AU-4 to TUG-3 to TUG-2 to VC-12 to E1to NxDS0
AU-3 to VC-3 to DS3
AU-3 to TUG-2 to VC-11 to T1 to NxDS0
AU-3 to TUG-2 to VC-12 to E1to NxDS0
AU-3 to VC-3 to E3
AU-3 to VC-3 to DS3 to T1 to NxDS0
Configuring Channelized SONET/SDH on the Cisco ASR 9000 Series Router
OL-26061-03