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Hardware Installation Guide for the Cisco 4451-X Integrated Services Router
OL-27644-01
Chapter 4 Initial Configuration
Performing the Initial Configuration on the Router
IP Routing
You can configure integrated routing and bridging (IRB) so the router can route and bridge
simultaneously. The router will act as an IP host on the network whether routing is enabled or not. To
read more about IRB see the following URL on Cisco.com,
http://www.cisco.com/en/US/tech/tk389/tk815/tk855/tsd_technology_support_sub-protocol_home.html
IP routing is automatically enabled in the Cisco ISO- XE software. When IP routing is configured, the
system will use a configured or learned route to forward packets, including a configured default route.
Note This task section does not apply when IP routing is disabled. To specify a default route when IP routing
is disabled, refer to the Configuring a Gateway of Last Resort Using IP Commands tech note on
Cisco.com.
Default Routes
A router might not be able to determine the routes to all other networks. To provide complete routing
capability, the common practice is to use some routers as smart routers and give the remaining routers
default routes to the smart router. (Smart routers have routing table information for the entire
internetwork.) These default routes can be passed along dynamically, or can be configured into the
individual routers.
Most dynamic interior routing protocols include a mechanism for causing a smart router to generate
dynamic default information that is then passed along to other routers.
Default Network
If a router has an interface that is directly connected to the specified default network, the dynamic
routing protocols running on the router will generate or source a default route. In the case of RIP, the
router will advertise the pseudonetwork 0.0.0.0. In the case of IGRP, the network itself is advertised and
flagged as an exterior route.
A router that is generating the default for a network also may need a default of its own. One way a router
can generate its own default is to specify a static route to the network 0.0.0.0 through the appropriate
device.
Gateway of Last Resort
When default information is being passed along through a dynamic routing protocol, no further
configuration is required. The system periodically scans its routing table to choose the optimal default
network as its default route. In the case of RIP, there is only one choice, network 0.0.0.0. In the case of
IGRP, there might be several networks that can be candidates for the system default. The Cisco IOS-XE
software uses both administrative distance and metric information to determine the default route
(gateway of last resort). The selected default route appears in the gateway of last resort display of the
show ip route EXEC command.
If dynamic default information is not being passed to the software, candidates for the default route are
specified with the ip default-network global configuration command. In this usage, the ip
default-network command takes an unconnected network as an argument. If this network appears in the
routing table from any source (dynamic or static), it is flagged as a candidate default route and is a
possible choice as the default route.
- Cisco Systems, Inc 1
- CONTENTS 3
- Contents 4
- 4 Initial Configuration 4-1 5
- Objectives 9
- Audience 9
- Organization 10
- Conventions 11
- Waarschuwing 12
- Varoitus 12
- Attention 12
- Avvertenza 13
- Advarsel 13
- ¡Advertencia! 13
- Varning! 13
- Related Documentation 17
- Searching for Cisco Documents 18
- About the Cisco ISR 4451-X 19
- Chassis Views 21
- Cisco ISR 4451-X Chassis 22
- Chassis Views 23
- Platform Summary 25
- Labels on Cisco ISR 4451-X 26
- Hardware Features 27
- Front Panel Ethernet Ports 28
- Dual Mode GE/SFP Ports 28
- USB Serial Console Port 28
- Front Panel PoE+ Ports 28
- LED Indicators 29
- Hardware Features 30
- External Slots 31
- Modules and Cards 33
- Power Supplies 34
- About Slots and Interfaces 35
- About Slots and Interfaces 36
- Slot Numbering 37
- Specifications 38
- Specifications 39
- Standard Warning Statements 44
- Standard Warning Statements 45
- Safety Recommendations 48
- Safety Recommendations 49
- General Site Requirements 50
- General Site Requirements 51
- Rack Requirements 52
- Console Port Connections 55
- Auxiliary Port Connections 56
- Ethernet Connections 57
- Installation Checklist 59
- Creating a Site Log 60
- What You Need to Know 63
- Before You Begin 63
- Unpacking the Router 64
- Installing the Router 64
- Rack-Mounting the Chassis 65
- Installing the Router 66
- Mounting the Router in a Rack 67
- Grounding the Chassis 69
- Statement 1032 70
- Chassis Grounding 71
- Connecting Power 72
- Connecting to AC Power 73
- • no parity 75
- • 1 stop bit 75
- • no flow control 75
- Using the Setup.exe program 78
- Statement 1001 80
- Ports and Cabling 82
- Initial Configuration 84
- Completing the Configuration 87
- Default Routes 96
- Default Network 96
- Gateway of Last Resort 96
- Configuration Examples 100
- SUMMARY STEPS 101
- DETAILED STEPS 101
- Prerequisites 102
- Examples 102
- ROM Monitor Overview 107
- Entering ROM Monitor Mode 108
- Environment Variable Settings 111
- Exiting ROM Monitor Mode 113
- Configuration Example 114
- Example of Upgrade 115
- Internal and External Modules 117
- Safety Warnings 118
- OL-27644-01 119
- Safety Warnings 119
- Accessing Internal Modules 120
- Overview 123
- LEDs on the NIM-SSD 124
- • 104°F (40°C) at sea level 125
- Solid State Drives (SSD) 126
- Restrictions 131
- Statement 94 132
- Locating and Orienting DIMM 134
- 1 Polarization notch 135
- Removing a DIMM 136
- Installing a DIMM 137
- Software Requirement for SMs 140
- Locating an SM or NIM 140
- Removing an SM or NIM 140
- Installing an SM 140
- Verifying SM Installation 141
- Statement 1073 144
- Statement 1030 144
- NIM in the Cisco ISR 4451-X 145
- ASR1000-RP1 147
- Replacing a Fan Tray 150
- Replacing a Fan Tray 151
- Installing SFP Modules 154
- Installing SFP Modules 155
- Laser Safety Guidelines 156
- Removing SFP Modules 156
- Statement 1051 157
- Hot-Swapping 159
- OIR Procedures 160
- Hot-Swapping Procedures 160
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