1-6
Cisco 6260 Hardware Installation Guide
OL-2365-02
Chapter 1 Product Overview
Introduction to the Cisco 6260 System
1.1.2.4 Subtended Network Configuration
The term
subtending
refers to the host chassis, and
subtended
refers to the downstream chassis in a
subtended network.
Note
For information on enabling redundancy in subtended network configurations, see the
“Redundancy in
Subtended Configurations” section on page 1-41
.
A subtended network configuration
•
Services and aggregates the data from one or more Cisco 6260 chassis into a subtending host chassis
to take advantage of the data network interface on the subtending host chassis.
•
Reduces the number of ATM edge-switch ports required to terminate the chassis.
•
Supports a Cisco 6260 system with a POTS splitter and a Cisco 6260 system without a POTS
splitter configuration.
A subtended network configuration supports the following features:
•
Four arbitration priorities, one for each quality of service (QoS) level. The supported QoS service
levels are
–
Constant bit rate (CBR) for rate-limited services that require guaranteed bandwidth and
bounded delay
–
Variable bit rate real time (VBR-rt) for delay-sensitive voice and video services
–
Variable bit rate nonreal time (VBR-nrt) for high-priority data services
–
Unspecified bit rate (UBR) for low-priority data services
•
Explicit forward congestion indication (EFCI) marking for available bit rate (ABR) service support.
•
Guaranteed frame rate (GFR).
Table 1-1
IMA Group Interface Names
Interface
Name
DS3 link
atm0/1
T1/E1 link 0
atm0/2
T1/E1 link 1
atm0/3
T1/E1 link 2
atm0/4
T1/E1 link 3
atm0/5
T1/E1 link 4
atm0/6
T1/E1 link 5
atm0/7
T1/E1 link 6
atm0/8
T1/E1 link 7
atm0/9
IMA group 0
atm0/ima0
IMA group 1
atm0/ima1
IMA group 2
atm0/ima2
IMA group 3
atm0/ima3