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Cisco 7600 Series Router SIP, SSC, and SPA Hardware Installation Guide
OL-5052-14
Chapter 3 Overview: Cisco 7600 Series Router Shared Port Adapters
2-Port Gigabit Synchronous Ethernet SPA Overview
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:
•
Classification and forwarding of 1588v2 protocol packets.
•
Hardware time stamping.
Note
The 2-Port Gigabit Synchronous Ethernet SPA hardware is the same for all configurations of the
product.
Table 3-34
describes key interface specifications on the 2-Port Gigabit Synchronous Ethernet SPA.
Table 3-34
Interface Specification for 2-Port Gigabit Synchronous Ethernet SPA
Power Supply
The 2-Gigabit Synchronous Ethernet SPA extracts 18.854 watts maximum. The actual Lab
measurements at room temperature result in only around 10.5 watts maximum.
Standards Compliance
The 2-Port Gigabit Synchronous Ethernet SPA complies with these standard specifications:
•
ITU-T G.8261 (2008) specifications for SyncE support on ethernet interfaces.
•
ITU-T G.8262 (OPTIONS 1 AND 2) for platform timing support and performance.
•
IETF TICTOC telecom profile support for performance.
•
ITU-T G.8261, G.8262, G.823, G.824, G.825, O.171, and O.172 for clock jitter and wander
specifications.
Specification
Description
Synchronous Ethernet support
Yes
Interface Type and Density
2x1 GE
Local Timing Interfaces
Input; Output
Local Timing Frequency
1.544 MHz / 2.048 MHz
BITS Interface Support
In; Out
SSM Support
Yes
IEEE 1588v2
Yes
NTPv4
Yes