Setup guide

C H A P T E R

5-1

Cisco 6400 Software Setup Guide

OL-1183-04

Redundancy and SONET APS Configuration

The Cisco 6400 contains two slots for node switch processors (NSPs) and eight slots for node line cards

(NLCs) or node route processors (NRPs), as shown in Figure5-1. Each slot can contain one full-height

or two half-height cards. NRPs and NSPs support enhanced high system availability (EHSA)

redundancy, and NLCs support SONET automatic protection switching (APS) redundancy at the

port-level.

Redundancy can be configured between:

• NSPs (always assumed when two NSPs are installed in the chassis)

• NRPs and full-height NLCs installed in the following slot pairs:

–

Slots 1 and 2, 3 and 4, 5 and 6, or 7 and 8

• Half-height NLCs installed in adjacent subslot pairs:

–

Subslots 0 (top) in slots 1 and 2, 3 and 4, 5 and 6, or 7 and 8

–

Subslots 1 (bottom) in slots 1 and 2, 3 and 4, 5 and 6, or 7 and 8

This chapter contains the following sections:

• Memory Requirements, page 5-2

• NSP Redundancy, page 5-3

• NRP Redundancy, page 5-15

• NLC Redundancy, page 5-17

• SONET APS for NLC Port Redundancy, page 5-19

• Primary and Secondary Role Switching, page 5-22