2-Port Gigabit Synchronous Ethernet Spa Interface Specifications - Cisco ASR1004 - ASR 1004 Modular Expansion Base Hardware Installation Manual
Aggregation services routers sip and spa
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- Quick start manual (39 pages) ,
- Install manual (32 pages) ,
- Software configuration manual (462 pages)
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Chapter 3
Overview: Cisco ASR 1000 Series Aggregation Services Routers SPAs
Figure 3-20
2-Port Gigabit Ethernet Synchronous Ethernet SPA Faceplate
2-Port Gigabit Synchronous Ethernet SPA Interface Specifications
The 2-Port Gigabit Synchronous Ethernet SPA is compatible with the 2-Port Gigabit Ethernet SPA on
all platforms and provides additional services of clock frequency and time of day synchronization.
The2-Port Gigabit Synchronous Ethernet SPA uses new technologies such as Synchronous Ethernet
(SyncE), ESMC, and IEEE1588v2.
However, the 2-Port Gigabit Synchronous Ethernet SPA supports only optical interfaces. As a result the
2-Port Gigabit Synchronous Ethernet SPA does not support multiple line speeds (10/100/1000 Mbps) on
the 2-Port Gigabit Ethernet SPA.
Synchronous Ethernet is a layer 1 technology which delivers a very accurate frequency reference, but it
doesn't address time synchronization. IEEE1588v2 defines a Precision Time Protocol (PTP), which
distributes accurate timing information (both clock frequency and time of day) over packet networks.
2-Port Gigabit Synchronous Ethernet SPA hardware supports IEEE1588v2, either as a client or server.
The 2-Port Gigabit Synchronous Ethernet SPA has these hardware capabilities to support the 1588v2
protocol stack:
•
•
Note
Table 3-21
Table 3-21
Interface Specification for 2-Port Gigabit Synchronous Ethernet SPA
Specification
Synchronous Ethernet support
Interface Type and Density
Local Timing Interfaces
Local Timing Frequency
BITS Interface Support
SSM Support
OL-14126-12
Classification and forwarding of 1588v2 protocol packets.
Hardware time stamping.
The 2-Port Gigabit Synchronous Ethernet SPA hardware is the same for all configurations of the
product.
describes key interface specifications on the 2-Port Gigabit Synchronous Ethernet SPA.
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Hardware Installation Guide
2-Port Gigabit Synchronous Ethernet SPA Overview
Description
Yes
2x1 GE
Input; Output
1.544 MHz / 2.048 MHz
In; Out
Yes
SPA-XXXXXXXXXXX
3-33
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