14-4
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide
OL-14127-08
Chapter 14 Overview of the Serial SPAs
Restrictions
–
DS3 far-end alarm and control (FEAC) channel support.
–
Full duplex connectivity at DS3 rate (44.736 MHz).
–
672 DS0s per T3.
–
Loopback modes: DTE, local, remote, dual, and network.
–
C-bit or M23 framing (software selectable).
–
Line build-out: configured for up to 450 feet (135 m) of type 734A or equivalent coaxial cable.
–
DS3 alarm/event detection (once per second polling):
- AIS
- Out of frame (OOF)
- Far-end receive failure (FERF)
–
Generation and termination of DS3 Maintenance Data Link (MDL) in C-bit framing.
–
Full FDL support and FDL performance monitoring.
Note FDL support is not supported on the 2-Port and 4-Port Clear Channel T3/E3 SPAs. It applies
to the 2-Port and 4-Port Channelized T3 SPAs, the 1-Port Channelized OC-3/STM-1 SPA,
and the 1-Port Channelized OC-12/STM-4 SPA.
–
Subrate and scrambling features for these DSU vendors:
– Cisco
– Digital Link
– ADC Kentrox
– Adtran
– Verilink
– Larscom
Restrictions
Consider the following restrictions when configuring the serial SPAs on the Cisco ASR 1000 Series
Routers:
Note For additional information, see also the configuration chapters for the corresponding SPA model. For
other SIP-specific features and restrictions see also Chapter 3, “Overview of the SIP”.
• FRF.16—Multilink Frame Relay (MLFR) is not supported.
• MLPPP is only supported on serial PPP interfaces. MLPPP is not supported over Frame Relay, ATM,
or PPPoE interfaces.
• Virtual-template interfaces are not supported with MLPPP.
• On a 2-Port and 4-Port Channelized T3 SPA, when one of the T3 ports is configured as a DS3 clear
channel interface and the other T3s are configured with a large number (greater than or equal to 400)
of low bandwidth channels (NxDS0, N=1, 2, 3, or 4), the DS3 clear channel interface is not able to
To Next Page
Loading...
Need help?
General
