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Chapter 1
Product Overview
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The NI-2 card provides one of following types of subtended network connections:
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The following sections detail the different types of subtending network connections.
1.1.2.4.1 Subtended Network Configuration with DS3/2DS3 NI-2 Cards
In a subtended network configuration using DS3/2DS3 NI-2 cards, you can subtend a Cisco 6260
chassis to four tiers, with up to 12 chassis, all connecting through one subtending host chassis to the
ATM backbone.
When the DS3/2DS3 NI-2 card is installed in the Cisco 6260 chassis, it adopts E3 functionality.
Figure 1-3
with daisy chain. The subtending host chassis at the top of the subtending tree connects directly to the
ATM switch. The middle two Cisco 6260 chassis in the lowest level are daisy chained. You make
network interface connections at the I/O module that is installed on the front of the Cisco 6260 chassis.
OL-2365-02
Tree or daisy chain topology configurations for E3 subtended Cisco 6260 chassis.
Star topology configurations for E1 or IMA group subtended Cisco 6260 chassis.
Daisy chain configurations for OC-3c subtended Cisco 6260 chassis.
Fair access to the trunk port for each subtended chassis.
A network trunk port that operates as fast as any subtended link.
An E3 ATM interface
A high-speed OC-3c optical ATM interface that supports single-mode fiber (SMF)
intermediate range
A high-speed OC-3c optical ATM interface that supports multimode fiber (MMF) short range
Up to eight E1 interfaces when you are using the DS3+T1/E1 IMA NI-2 card in conjunction with
the E1 I/O module.
Up to four IMA interfaces when you are using the DS3+T1/E1 IMA NI-2 card in conjunction with
the E1 I/O module.
shows E3-configured Cisco 6260 systems subtended in a combined subtending tree topology
Introduction to the Cisco 6260 System
Cisco 6260 Hardware Installation Guide
1-7
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