Installation guide

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