•
Path Diagnostics:
◦
Path alarm indication signal (PAIS)
◦
Path remote defect indication (PRDI)
◦
Path remote error indication (PREI)
◦
Error counts for B3
◦
Threshold crossing alarms for B3 (B3-TCA)
◦
Loss of pointer (PLOP)
◦
New pointer events (NEWPTR)
◦
Positive stuffing event (PSE)
◦
Negative stuffing event (NSE)
•
The following loopback tests are supported:
◦
Network (line) loopback
◦
Internal (diagnostic) loopback
•
Supported SONET/SDH synchronization:
◦
Local (internal) timing (for inter-router connections over dark fiber or wavelength division
multiplexing [WDM] equipment)
◦
Loop (line) timing (for connecting to SONET/SDH equipment)
◦ +/– 4.6 ppm clock accuracy over the full range of the operating temperature
Layer 2 Features
•
Supports the following encapsulation types:
◦
AAL5SNAP (LLC/SNAP)
◦
AAL5MUX (VC multiplexing)
◦
AAL5NLPID
•
Supports the following ATM traffic classes and per-VC traffic shaping modes:
◦
Constant bit rate (CBR) with peak rate
◦
Unspecified bit rate (UBR) with peak cell rate (PCR)
◦
Non-real-time variable bit rate (VBR-nrt)
◦
Variable bit rate real-time (VBR-rt)
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS
XE Everest 16.5
50 OL-14127-17
Overview of the ATM SPAs
Layer 2 Features