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debug atm packet Command, Field, Description

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ATM Troubleshooting Commands Chapter 14 Troubleshooting 00:03:00: DSL: 1: Modem state = 0x8 00:03:00: DSL: 1: Modem state = 0x8 00:03:00: DSL: 1: Modem state = 0x8 00:03:00: DSL: 1: Modem state = 0x8 debug atm packet Command Use the debug atm packet command to display all process-level ATM packets for both outbound and inbound packets. The output reports information online when a packet is received or a transmission is attempted. The no form of this command disables debugging output. Caution Because the debug atm packet command generates a significant amount of output for every packet processed, use it only when network traffic is low, so that other system activities are not adversely affected. The command syntax is: debug atm packet [interface atm number [vcd vcd-number][vc vpi/vci number]] no debug atm packet [interface atm number [vcd vcd-number][vc vpi/vci number]] where the keywords are defined as follows: interface atm number (Optional) ATM interface or subinterface number. vcd vcd-number (Optional) Number of the virtual circuit designator (VCD). vc vpi/vci number VPI/VCI value of the ATM PVC. Example 14-7 shows sample output for the debug atm packet command. Example 14-7 Viewing ATM Packet Processing Router# debug atm packet Router# 01:23:48:ATM0(O): VCD:0x1 VPI:0x1 VCI:0x64 DM:0x0 SAP:AAAA CTL:03 OUI:000000 TYPE:0800 Length:0x70 01:23:48:4500 0064 0008 0000 FF01 9F80 0E00 0010 0E00 0001 0800 A103 0AF3 17F7 0000 01:23:48:0000 004C BA10 ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD 01:23:48:ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD 01:23:48:ABCD ABCD ABCD ABCD ABCD 01:23:48: 01:23:48:ATM0(I): VCD:0x1 VPI:0x1 VCI:0x64 Type:0x0 SAP:AAAA CTL:03 OUI:000000 TYPE:0800 Length:0x70 01:23:48:4500 0064 0008 0000 FE01 A080 0E00 0001 0E00 0010 0000 A903 0AF3 17F7 0000 01:23:48:0000 004C BA10 ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD 01:23:48:ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD 01:23:48:ABCD ABCD ABCD ABCD ABCD 01:23:48: Table 14-3 describes some of the fields shown in the debug atm packet command output. Table 14-3 debug atm packet Command Output Description Field ATM0 (O) Description Interface that is generating the packet. Output packet. (I) would mean receive packet. 14-8 Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide OL-5332-01

Section	Page
Contents	3
Audience	11
Organization	12
Conventions	13
Notes, Cautions, and Timesavers	13
Command Conventions	13
Related Documents	14
Obtaining Documentation and Submitting a Service Request	14
Part 1	15
Getting Started	15
Basic Router Configuration	17
Interface Port Labels	17
Viewing the Default Configuration	18
Information Needed for Configuration	20
Configuring Basic Parameters	21
Configure Global Parameters	21
Configure Fast Ethernet LAN Interfaces	22
Configure WAN Interfaces	22
Configure the Fast Ethernet WAN Interface	22
Configure the ATM WAN Interface	23
Configure the Wireless Interface	23
Configuring a Loopback Interface	24
Configuration Example	24
Verifying Your Configuration	25
Configuring Command-Line Access to the Router	25
Configuration Example	27
Configuring Static Routes	27
Configuration Example	28
Verifying Your Configuration	28
Configuring Dynamic Routes	28
Configuring RIP	29
Configuration Example	30
Verifying Your Configuration	30
Configuring Enhanced IGRP	30
Configuration Example	31
Verifying Your Configuration	31
Part 2	33
Configuring Your Router for Ethernet and DSL Access	33
Sample Network Deployments	35
Configuring PPP over Ethernet with NAT	37
Configure the Virtual Private Dialup Network Group Number	38
Configure the Fast Ethernet WAN Interfaces	39
Configure the Dialer Interface	40
Configure Network Address Translation	42
Configuration Example	44
Verifying Your Configuration	45
Configuring PPP over ATM with NAT	47
Configure the Dialer Interface	49
Configure the ATM WAN Interface	51
Configure DSL Signaling Protocol	52
Configuring ADSL	52
Verify the Configuration	53
Configuring SHDSL	53
Verify the Configuration	54
Configure Network Address Translation	55
Configuration Example	57
Verifying Your Configuration	58
Configuring a LAN with DHCP and VLANs	59
Configure DHCP	60
Configuration Example	62
Verify Your DHCP Configuration	62
Configure VLANs	63
Assign a Switch Port to a VLAN	64
Verify Your VLAN Configuration	64
Configuring a VPN Using Easy VPN and an IPSec Tunnel	67
Configure the IKE Policy	70
Configure Group Policy Information	71
Apply Mode Configuration to the Crypto Map	72
Enable Policy Lookup	72
Configure IPSec Transforms and Protocols	73
Configure the IPSec Crypto Method and Parameters	74
Apply the Crypto Map to the Physical Interface	75
Create an Easy VPN Remote Configuration	76
Verifying Your Easy VPN Configuration	77
Configuration Example	77
Configuring VPNs Using an IPSec Tunnel and Generic Routing Encapsulation	79
Configure a VPN	80
Configure the IKE Policy	81
Configure Group Policy Information	82
Enable Policy Lookup	83
Configure IPSec Transforms and Protocols	83
Configure the IPSec Crypto Method and Parameters	84
Apply the Crypto Map to the Physical Interface	85
Configure a GRE Tunnel	86
Configuration Example	87
Configuring a Simple Firewall	91
Configure Access Lists	93
Configure Inspection Rules	93
Apply Access Lists and Inspection Rules to Interfaces	94
Configuration Example	95
Configuring a Wireless LAN Connection	97
Configure the Root Radio Station	98
Configure Bridging on VLANs	100
Configure Radio Station Subinterfaces	102
Configuration Example	103
Sample Configuration	105
Part 3	111
Configuring Additional Features and Troubleshooting	111
Additional Configuration Options	113
Configuring Security Features	115
Authentication, Authorization, and Accounting	115
Configuring AutoSecure	116
Configuring Access Lists	116
Access Groups	117
Guidelines for Creating Access Groups	117
Configuring a CBAC Firewall	117
Configuring Cisco IOS Firewall IDS	118
Configuring VPNs	118
Configuring Dial Backup and Remote Management	119
Dial Backup Feature Activation Methods	119
Backup Interfaces	120
Configuring Backup Interfaces	120
Floating Static Routes	120
Configuring Floating Static Routes	121
Dialer Watch	122
Configuring Dialer Watch	122
Dial Backup Feature Limitations	123
Configuration Example	124
Configuring Dial Backup and Remote Management Through the Console or Auxiliary Port	127
Configuration Tasks	128
Configuration Example	131
Configuring Dial Backup and Remote Management Through the ISDN S/T Port	134
Configuration Tasks	135
Configure ISDN Settings	135
Configure the Aggregator and ISDN Peer Router	138
Troubleshooting	141
Getting Started	141
Before Contacting Cisco or Your Reseller	141
ADSL Troubleshooting	142
SHDSL Troubleshooting	142
ATM Troubleshooting Commands	142
ping atm interface Command	143
show interface Command	143
show atm interface Command	145
debug atm Commands	146
Guidelines for Using Debug Commands	146
debug atm errors Command	146
debug atm events Command	147
debug atm packet Command	148
Software Upgrade Methods	149
Recovering a Lost Password	149
Change the Configuration Register	150
Reset the Router	151
Reset the Password and Save Your Changes	152
Reset the Configuration Register Value	152
Managing Your Router with SDM	153
Part 4	155
Reference Information	155
Cisco IOS Software Basic Skills	157
Configuring the Router from a PC	157
Understanding Command Modes	158
Getting Help	160
Enable Secret Passwords and Enable Passwords	161
Entering Global Configuration Mode	161
Using Commands	162
Abbreviating Commands	162
Undoing Commands	162
Command-Line Error Messages	162
Saving Configuration Changes	163
Summary	163
Where to Go Next	163
Concepts	165
ADSL	165
SHDSL	166
Network Protocols	166
IP	166
Routing Protocol Options	166
RIP	167
Enhanced IGRP	167
PPP Authentication Protocols	167
PAP	168
CHAP	168
TACACS+	169
Network Interfaces	169
Ethernet	169
ATM for DSL	169
PVC	170
Dialer Interface	170
Dial Backup	170
Backup Interface	170
Floating Static Routes	171
Dialer Watch	171
NAT	171
Easy IP (Phase 1)	172
Easy IP (Phase 2)	172
QoS	173
IP Precedence	173
PPP Fragmentation and Interleaving	173
CBWFQ	174
RSVP	174
Low Latency Queuing	174
Access Lists	175
ROM Monitor	177
Entering the ROM Monitor	177
ROM Monitor Commands	178
Command Descriptions	179
Disaster Recovery with TFTP Download	179
TFTP Download Command Variables	180
Required Variables	180
Optional Variables	181
Using the TFTP Download Command	181
Configuration Register	182
Changing the Configuration Register Manually	182
Changing the Configuration Register Using Prompts	182
Console Download	183
Command Description	184
Error Reporting	184
Debug Commands	184
Exiting the ROM Monitor	186

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14-8

Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide

OL-5332-01

Chapter 14

Troubleshooting

ATM Troubleshooting Commands

00:03:00: DSL: 1: Modem state = 0x8

debug atm packet Command

Use the

debug atm

packet

command to display all process-level ATM packets for both outbound and

inbound packets. The output reports information online when a packet is received or a transmission is

attempted. The

form of this command disables debugging output.

Caution

Because the

debug atm packet

command generates a significant amount of output for every packet

processed, use it only when network traffic is low, so that other system activities are not adversely

affected.

The command syntax is:

debug atm packet

[

interface atm

number

[

vcd

vcd-number

][

vpi/vci

number

]]

no debug atm packet

[

interface atm

number

[

vcd

vcd-number

][

vpi/vci

number

]]

where the keywords are defined as follows:

interface atm

number

(Optional) ATM interface or subinterface number.

vcd

vcd-number

(Optional) Number of the virtual circuit designator (VCD).

vpi/vci number

VPI/VCI value of the ATM PVC.

Example 14-7

shows sample output for the

debug atm packet

command.

Example 14-7

Viewing ATM Packet Processing

Router#

debug atm packet

Router#

01:23:48:ATM0(O):

VCD:0x1 VPI:0x1 VCI:0x64 DM:0x0 SAP:AAAA CTL:03 OUI:000000 TYPE:0800 Length:0x70

01:23:48:4500 0064 0008 0000 FF01 9F80 0E00 0010 0E00 0001 0800 A103 0AF3 17F7 0000

01:23:48:0000 004C BA10 ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD

01:23:48:ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD

01:23:48:ABCD ABCD ABCD ABCD ABCD

01:23:48:

01:23:48:ATM0(I):

VCD:0x1 VPI:0x1 VCI:0x64 Type:0x0 SAP:AAAA CTL:03 OUI:000000 TYPE:0800 Length:0x70

01:23:48:4500 0064 0008 0000 FE01 A080 0E00 0001 0E00 0010 0000 A903 0AF3 17F7 0000

01:23:48:0000 004C BA10 ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD

01:23:48:ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD

01:23:48:ABCD ABCD ABCD ABCD ABCD

01:23:48:

Table 14-3

describes some of the fields shown in the

debug atm packet

command output.

Table 14-3

debug atm packet Command Output Description

Field

Description

ATM0

Interface that is generating the packet.

(O)

Output packet. (I) would mean receive packet.