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Cisco 3925 User Manual
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Cisco 390
0 S
eries, Cisco 290
0 S
eries, and
Cisco 1
90
0
S
eries
Integrated
Services
Router
s Generation 2
S
of
tware Configuration Guide
April 1
0, 20
15
2
Table of Contents
Overview of the Hardware and Software
9
Feature Information
10
New Features by Platform
12
New Slots
12
Cisco 2900 Series Isrs
13
Cisco 3900 Series Isrs
13
New Slots and Ports by Platform
13
Cisco 1900 Series Isrs
14
Common Ports
14
Getting Started
15
IOS Commands
16
Table of Contents
21
Basic Router Configuration
21
Default Configuration
22
Configuring Global Parameters
23
Configuring I/O Memory Allocation
24
Interface Ports
25
Configuring Gigabit Ethernet Interfaces
26
Configuring a Loopback Interface
27
Configuring Interface Card and Module Interfaces
27
Configuring Wireless LAN Interfaces
27
Verifying Configuration
28
Configuring Command-Line Access
29
Configuring Static Routes
31
Configuring Dynamic Routes
33
Configuring Routing Information Protocol
33
Configuring Enhanced Interior Gateway Routing Protocol
35
Configuring a Network Interface Device on the L3 Interface
37
Configuring the NID
37
Troubleshooting the NID Configuration
39
Verifying the NID Configuration
39
Ethernet Data Plane Loopback
40
Restrictions for Configuring External Ethernet Data Plane Loopback
40
Configuring External Ethernet Data Plane Loopback
41
Configuration Examples for Ethernet Data Plane Loopback
43
Session ID
43
Verifying the Ethernet Data Plane Loopback Configuration
44
Troubleshooting the Ethernet Data Plane Loopback Configuration
45
CFM Support on Routed Port and Port MEP
46
Configuring Ethernet CFM (Port MEP)
46
Level
46
Restrictions for Configuring Ethernet CFM
46
Configuration Example for Ethernet CFM (Port MEP)
48
Verifying the Ethernet CFM Configuration on a Port MEP
48
Configuring Ethernet CFM (Single-Tagged Packets)
52
Verifying the Ethernet CFM Configuration for Single-Tagged Packets
54
Configuring Ethernet CFM (Double-Tagged Packets)
56
Configuration Example for Ethernet CFM (Double-Tagged Packets)
58
Verififying the Ethernet CFM Configuration for Double-Tagged Packets
58
Configuring Two-Way Delay Measurement
62
Restrictions for Configuring Two-Way Delay Measurement
62
Support for Y.1731 Performance Monitoring on a Routed Port
62
Configuration Examples for Two-Way Delay Measurement
64
Verifying Two-Way Delay Measurement Configuration
64
Troubleshooting Two-Way Delay Measurement Configuration
67
Configuring an EFP and a BD on the Cisco ISR G2 Router
69
Configuring Ethernet Virtual Connection Bridge Domain
69
Configuring Evcs on Cisco ISR G2 Router
69
Configuration Examples for Evcs on the Cisco ISR G2 Router
71
Configuring Ethernet Data Plane Loopback
72
Features Supported for Ethernet Data Plane Loopback
72
Configuring Ethernet CFM
76
Connectivity Fault Management (CFM) over EVC BD
76
Provisioning Service (CE-A)
81
Provisioning Service (CE-B)
84
Configuring and Enabling the Cross-Check Function (CE-B)
88
Support for Y.1731 Performance Monitoring for EVC BD
95
Configuration Examples to Add an Access Port SVI to a BD
99
Configuring SVI as Access Port
99
Restrictions for SVI Support on Bds
99
EVC Quality of Service (Qos)
100
Configuring Etherchannel
101
Restrictions and Guidelines for Etherchannel Feature
101
Understanding Etherchannel Feature
101
Configuring Backup Data Lines and Remote Management
105
Configuring Backup Interfaces
105
Assigning Primary and Secondary Failover Media
107
Configuring Gigabit Ethernet Failover Media
107
Enabling Auto-Detect
108
Configuring Cellular Dial-On-Demand Routing Backup
109
Configuring DDR Backup Using Dialer Watch
110
Cellular Wireless Modem as Backup with NAT and Ipsec Configuration
112
Configuring ISDN Settings
125
Configuring Third-Party Sfps
129
Configuring Power Efficiency Management
133
Modules and Interface Supporting Energywise
133
Restrictions for Power Efficiency Management and OIR
134
Configuring Security Features
135
Configuring SSL VPN
135
Configuring the Cryptographic Engine Accelerator
135
Authentication, Authorization, and Accounting
136
Configuring Autosecure
136
Access Groups
137
Configuring Access Lists
137
Configuring Cisco IOS Firewall
138
Zone-Based Policy Firewall
138
Configuring Cisco IOS IPS
139
Configuring VPN
139
Content Filtering
139
Remote Access VPN Using Ipsec Tunnel
140
Site-To-Site VPN Using an Ipsec Tunnel and GRE
141
Configure a VPN over an Ipsec Tunnel
142
Configure the IKE Policy
143
Configure Group Policy Information
144
Apply Mode Configuration to the Crypto Map
146
Enable Policy Lookup
147
Configure Ipsec Transforms and Protocols
148
Configure the Ipsec Crypto Method and Parameters
149
Apply the Crypto Map to the Physical Interface
150
Create a Cisco Easy VPN Remote Configuration
151
Configure a Site-To-Site GRE Tunnel
154
Configuring Dynamic Multipoint VPN
157
Configuring Group Encrypted Transport VPN
158
Restrictions for SGT over Ethernet Tagging
159
SGT over Ethernet Tagging
159
Example: Configuring SGT over Ethernet Tagging
161
Verifying SGT over Ethernet Tagging
161
Authentication Methods
163
Configuring Identity Features on Layer 3 Interface
163
Configuring the IEEE 802.1X
163
Verifying the IEEE 802.1X
164
Configuring the MAC Authentication Bypass (MAB)
165
Verifying the MAB
166
Configuring the Controlling Port Authorization State
167
Controlling Port Authorization State
167
Verifying the Controlling Port Authorization State
168
Configuring Flexible Authentication
170
Flexible Authentication
170
Host Mode
170
Open Access
170
Configuring Control-Direction (Wake-On-LAN)
171
Control-Direction (Wake-On-LAN)
171
Verifying Default Control-Direction Setting-Both
173
Configuring the Preauthentication Access Control List
174
Preauthentication Access Control List
174
Verifying Authentication Control-Direction Setting-In
174
Downloadable Access Control List
175
Filter-ID or Named Access Control List
175
IP Device Tracking
175
Unified Communications on Cisco Integrated Services Routers
177
Call Control
178
Cisco Unified Communications Manager Express
178
Modules and Interface Cards
178
Unified Survivable Remote Site Telephony
179
Call Control Protocols
180
Cisco Unified SIP Proxy (CUSP)
180
Gatekeeper
180
Trunk-Side Protocols
180
Line-Side Protocols
181
Media Gateway Control Protocol (MGCP)
181
Session Initiation Protocol (SIP)
181
SCCP-Controlled Analog Ports with Supplementary Features
182
Unified Communications Gateways
182
TDM Gateways
183
Voice Gateways
183
Cisco Unified Border Element
184
Unified Messaging Gateway
184
Conferencing, Transcoding and Media Termination Point (MTP)
185
IP Media Services
185
RSVP Agent
185
Trusted Relay Point (TRP)
185
Packet Voice Data Module
186
UC Trusted Firewall
186
Voice Security
186
Applications and Application Interfaces (Apis)
187
Signaling and Media Authentication and Encryption
187
Virtual Route Forward
187
Cisco Unity Express
188
Voice XML
188
Cisco Application Extension Platform
189
Hoot-N-Holler
189
Gatekeeper Transaction Message Protocol (GKTMP)
190
Online Insertion and Removal
190
Configuring Next-Generation High-Density PVDM3 Modules
193
DSP Resource Manager Enhancement and DSP Numbering
195
DSP Image for the PVDM3
196
Conferencing
197
DSP Farm Profiles
197
DSP Farms
197
Broadcast Fast Busy Tone for DSP Oversubscription
198
TDM Sharing/Pooling Configuration
202
Transmitted
208
Show Running-Config: Example
210
Configuring Multi-Gigabit Fabric Communication
219
Restrictions for Module and Interface Card Communication
219
Supported Slots, Modules, and Interface Cards
219
Cisco Etherswitch Service Modules
220
Wireless LAN Module in the Cisco 1941W ISR
220
Cisco High-Speed Intrachassis Module Interconnect (HIMI)
221
Viewing Module and Interface Card Status on the Router
222
Viewing Platform Information
222
Viewing VLAN and Slot Assignments
222
Viewing Multi-Gigabit Fabric Statistics
223
Viewing Multi-Gigabit Fabric CPU Port Statistics
224
Restrictions for Upgrading the System Image
225
Upgrading the Cisco IOS Software
225
Information about Upgrading the System Image
226
Why Would I Upgrade the System Image?
226
Saving Backup Copies of Your Old System Image and Configuration
228
Ensuring Adequate DRAM for the New System Image
229
Ensuring Adequate Flash Memory for the New System Image
231
Copying the System Image into Flash Memory
234
Loading the New System Image
240
Saving Backup Copies of Your New System Image and Configuration
245
Define the WAN Interface on the Router
247
How to Upgrade the IOS Image on the Access Point
247
Confirm Connectivity and Settings
248
Secure an IP Address on the Access Point
248
Upgrading the IOS Image on the Access Point
249
Software Modes
251
Wireless Device Overview
251
Management Options
252
Network Configuration Examples
252
Root Access Point
252
Central Unit in an All-Wireless Network
253
Configuring the Wireless Device
255
Starting a Wireless Configuration Session
255
Configuring Wireless Settings
257
Cisco Express Setup
258
Cisco IOS CLI
258
Configuring the Radio
258
Configuring Authentication
259
Configuring Wireless Security Settings
259
Assigning Ssids
260
Configuring WEP and Cipher Suites
260
Configuring Wireless Vlans
260
Types of SSID Security
261
Configuring Wireless Quality of Service
262
Configuring the Access Point in Hot Standby Mode
263
Preparing for the Upgrade
263
Upgrading to Cisco Unified Software
263
Performing the Upgrade
264
Downgrading the Software on the Access Point
265
Recovering Software on the Access Point
265
Troubleshooting an Upgrade or Reverting the AP to Autonomous Mode
265
Configuring Radio Settings
269
Enabling the Radio Interface
269
Configuring the Role in the Radio Network
271
Configuring Dual-Radio Fallback
273
Radio Tracking
273
Configuring Radio Data Rates
274
Fast Ethernet Tracking
274
MAC-Address Tracking
274
Interface Configuration
275
Configuring MCS Rates
277
Data Rates Based on MCS Settings, Guard Interval, and Channel Width
278
Configuring Radio Transmit Power
279
Limiting the Power Level for Associated Client Devices
279
802.11N Channel Widths
281
Configuring Radio Channel Settings
281
Dynamic Frequency Selection
282
Cli Commands
284
Confirming that DFS Is Enabled
284
Configuring a Channel
285
Blocking Channels from DFS Selection
286
Simulating Radar Detection
286
Enabling and Disabling World Mode
287
Setting the 802.11N Guard Interval
287
Disabling and Enabling Short Radio Preambles
289
Configuring Transmit and Receive Antennas
290
Enabling and Disabling Gratuitous Probe Response
291
Disabling and Enabling Aironet Extensions
292
Configuring the Ethernet Encapsulation Transformation Method
293
Enabling and Disabling Public Secure Packet Forwarding
294
Configuring Protected Ports
295
Configuring the Beacon Period and the DTIM
296
Configure RTS Threshold and Retries
297
Configuring the Fragmentation Threshold
298
Configuring the Maximum Data Retries
298
Enabling Short Slot Time for 802.11G Radios
299
Performing a Carrier Busy Test
299
Configuring Voip Packet Handling
300
Administering the Wireless Device
303
Preventing Unauthorized Access to Your Access Point
305
Protecting Access to Privileged EXEC Commands
305
Configuring Default Password and Privilege Level
306
Setting or Changing a Static Enable Password
306
Protecting Enable and Enable Secret Passwords with Encryption
307
Configuring Username and Password Pairs
309
Configuring Multiple Privilege Levels
310
Setting the Privilege Level for a Command
311
Logging into and Exiting a Privilege Level
312
Configuring RADIUS Login Authentication
313
Controlling Access Point Access with RADIUS
313
Default RADIUS Configuration
313
Defining AAA Server Groups
315
Network Services
317
Controlling Access Point Access with TACACS+
318
Displaying the Radius Configuration
318
Configuring TACACS+ Login Authentication
319
Default TACACS+ Configuration
319
Administering the Wireless Hardware and Software
322
Rebooting the Wireless Device
322
Resetting the Wireless Device to the Factory Default Configuration
322
Managing the System Time and Date
323
Monitoring the Wireless Device
323
Configuring Time and Date Manually
324
Understanding Simple Network Time Protocol
324
Displaying the Time and Date Configuration
325
Setting the System Clock
325
Configuring Summer Time (Daylight Saving Time)
326
Configuring the Time Zone
326
Configuring a System Name and Prompt
329
Default System Name and Prompt Configuration
329
Understanding DNS
330
Default DNS Configuration
331
Setting up DNS
331
Creating a Banner
332
Displaying the DNS Configuration
332
Configuring a Message-Of-The-Day Login Banner
333
Default Banner Configuration
333
Configuring a Login Banner
334
Configuring Ethernet Speed and Duplex Settings
335
Configuring the Access Point for Wireless Network Management
336
Configuring the Authentication Cache and Profile
338
Configuring the Access Point to Provide DHCP Service
340
Setting up the DHCP Server
340
Monitoring and Maintaining the DHCP Server Access Point
342
Show Commands
342
Clear Commands
343
Configuring the Access Point for Secure Shell
343
Debug Command
343
Understanding SSH
343
Configuring Client ARP Caching
344
Configuring SSH
344
Optional ARP Caching
344
Understanding Client ARP Caching
344
Configuring ARP Caching
345
Cisco IOS CLI for Initial Configuration
347
Configuring the Router Hostname
348
Using the Cisco IOS CLI to Perform Initial Configuration
348
Configuring the Enable and Enable Secret Passwords
349
Configuring the Console Idle Privileged EXEC Timeout
351
IP Routing
354
Specifying a Default Route or Gateway of Last Resort
354
Default Network
355
Default Routes
355
Gateway of Last Resort
355
Configuring Virtual Terminal Lines for Remote Console Access
357
Configuring the Auxiliary Line
359
Verifying Network Connectivity
360
Saving Backup Copies of Configuration and System Image
362
Saving Your Router Configuration
362
Compactflash Support
365
Formatting Compactflash
365
Requirements and Restrictions
365
Using Compactflash Memory Cards
365
Determining the File System on a Compactflash Memory Card
366
How to Format Compactflash Memory Cards
366
Formatting Compactflash Memory as a Class C File System
367
Copying Files
368
File Operations on Compactflash Memory Cards
368
Displaying File Content
369
Displaying Files
369
Privileged Exec Mode
369
Deleting Files
370
Displaying Geometry and Format Information
370
Renaming Files
370
Directory Operations on a Compactflash Memory Card
371
Entering a Directory and Determining Which Directory You Are in
371
Creating a New Directory
372
Removing a Directory
373
Information about the ROM Monitor
375
ROM Monitor Mode Command Prompt
375
Using ROM Monitor
375
Tips for Using ROM Monitor Commands
376
When Do I Use ROM Monitor?
376
Why Is the Router in ROM Monitor Mode?
376
Accessibility
377
Entering ROM Monitor Mode
377
How to Use the ROM Monitor—Typical Tasks
377
Setting the Configuration Register to Boot to ROM Monitor Mode
379
Displaying Files in a File System (Dir)
382
Loading a System Image (Boot)
382
Modifying the Configuration Register (Confreg)
387
Obtaining Information on USB Flash Devices
388
Modifying the I/O Memory (Iomemset)
389
Recovering the System Image (Tftpdnld)
390
Troubleshooting Crashes and Hangs
394
ROM Monitor Console Communication Failure
395
Router Crashes
395
Router Hangs
395
Exiting ROM Monitor Mode
399
Troubleshooting Tips
399
Changing the Configuration Register Settings
403
Configuring the Console Line Speed (Cisco IOS CLI)
407
Displaying the Configuration Register Settings
407
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Cisco 3925 Specifications
General
Brand
Cisco
Model
3925
Category
Network Router
Language
English
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