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debug ip packet Command Example Partial, Table 15-1., offset in 8-byte units

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Example Figure 15-3. debug ip packet Command Example (Partial) IP: s=10.1.2.62 (local), d=10.1.2.206 (Ma 0/0), len 54, sending TCP src=23, dst=40869, seq=2112994894, ack=606901739, win=8191 ACK PUSH IP: s=10.1.2.206 (Ma 0/0), d=10.1.2.62, len 40, rcvd TCP src=0, dst=0, seq=0, ack=0, win=0 IP: s=10.1.2.62 (local), d=10.1.2.206 (Ma 0/0), len 226, sending TCP src=23, dst=40869, seq=2112994896, ack=606901739, win=8192 ACK PUSH IP: s=10.1.2.216 (Ma 0/0), d=10.1.2.255, len 78, rcvd UDP src=0, dst=0 IP: s=10.1.2.62 (local), d=10.1.2.3 (Ma 0/0), len 1500, sending fragment IP Fragment, Ident = 4741, fragment offset = 0 ICMP type=0, code=0 IP: s=10.1.2.62 (local), d=10.1.2.3 (Ma 0/0), len 1500, sending fragment IP Fragment, Ident = 4741, fragment offset = 1480 IP: s=40.40.40.40 (local), d=224.0.0.5 (Te 4/11), len 64, sending broad/multicast proto=89 IP: s=40.40.40.40 (local), d=224.0.0.6 (Te 4/11), len 28, sending broad/multicast proto=2 IP: s=0.0.0.0, d=30.30.30.30, len 100, unroutable ICMP type=8, code=0 IP: s=0.0.0.0, d=30.30.30.30, len 100, unroutable ICMP type=8, code=0 Table 15-1. debug ip packet Command Example Fields Field s= d= len sending rcvd fragment sending broad/multicast proto unroutable TCP src= UDP src= ICMP type= IP Fragment Description Lists the source address of the packet and the name of the interface (in parentheses) that received the packet. Lists the destination address of the packet and the name of the interface (in parentheses) through which the packet is being sent out on the network. Displays the packet's length. The last part of each line lists the status of the packet. Displays the source and destination ports, the sequence number, the acknowledgement number, and the window size of the packets in that TCP packets. Displays the source and destination ports for the UDP packets. Displays the ICMP type and code. States that it is a fragment and displays the unique number identifying the fragment (Ident) and the offset (in 8-byte units) of this fragment (fragment offset) from the beginning of the original datagram. IPv4 Routing | 297

Section	Page
About this Guide	9
Objectives	9
Audience	9
Conventions	9
Information Symbols	10
Related Documents	10
CLI Basics	11
Accessing the Command Line	11
Multiple Configuration Users	12
Navigating the Command Line Interface	12
Obtaining Help	13
Using the Keyword no	15
Filtering show Commands	15
Displaying All Output	16
Filtering Command Output Multiple Times	16
Command Modes	16
EXEC Mode	16
EXEC Privilege Mode	17
CONFIGURATION Mode	17
INTERFACE Mode	17
LINE Mode	18
MAC ACCESS LIST Mode	18
IP ACCESS LIST Mode	18
ROUTE-MAP Mode	18
PREFIX-LIST Mode	19
SPANNING TREE Mode	19
Per-VLAN SPANNING TREE Plus Mode	19
RAPID SPANNING TREE Mode	19
MULTIPLE SPANNING TREE Mode	20
PROTOCOL GVRP Mode	20
ROUTER OSPF Mode	20
ROUTER RIP Mode	20
File Management	21
Overview	21
Basic File Management Commands	21
Control and Monitoring	37
Commands	37
Important Points to Remember	67
u-Boot	81
Overview	81
Commands	81
Access Control Lists (ACL)	91
Overview	91
Commands Common to all ACL Types	91
Common IP ACL Commands	94
Standard IP ACL Commands	98
Extended IP ACL Commands	102
Common MAC Access List Commands	117
Standard MAC ACL Commands	120
Extended MAC ACL Commands	123
IP Prefix List Commands	127
Route Map Commands	132
Bare Metal Provisioning	143
Overview	143
Commands	143
Content Addressable Memory (CAM)	147
Overview	147
CAM Profile Commands	147
Important Points to Remember	147
Data Center Bridging	153
Overview	153
DCB Command	153
PFC Commands	153
ETS Commands	154
DCBX Commands	154
Dynamic Host Configuration Protocol (DHCP)	187
Overview	187
Commands to Configure the System to be a DHCP Server	187
Commands to Configure the System to be a DHCP Client	194
Other Commands supported by DHCP Client	195
Commands to Configure Secure DHCP	198
FIP Snooping	205
Overview	205
GARP VLAN Registration (GVRP)	217
Commands	217
Important Points to Remember	218
Internet Group Management Protocol (IGMP)	227
IGMP Snooping Commands	227
Important Points to Remember for IGMP Snooping	227
Important Points to Remember for IGMP Querier	228
Interfaces	235
Overview	235
Basic Interface Commands	235
Port Channel Commands	277
Time Domain Reflectometer (TDR)	284
Important Points to Remember	284
UDP Broadcast	286
Important Points to Remember	286
IPv4 Routing	289
Commands	289
iSCSI Optimization	323
Overview	323
Link Aggregation Control Protocol (LACP)	331
Overview	331
Commands	331
Layer 2	337
Overview	337
MAC Addressing Commands	337
Virtual LAN (VLAN) Commands	347
Link Layer Discovery Protocol (LLDP)	355
Overview	355
Commands	355
LLDP-MED Commands	363
Multiple Spanning Tree Protocol (MSTP)	371
Overview	371
Commands	371
Open Shortest Path First (OSPFv2)	385
Overview	385
OSPFv2 Commands	385
Port Monitoring	433
Overview	433
Commands	433
Important Points to Remember	433
Private VLAN (PVLAN)	439
Commands	439
Private VLAN Concepts	440
Per-VLAN Spanning Tree Plus (PVST+)	449
Overview	449
Commands	449
Quality of Service (QoS)	461
Overview	461
Global Configuration Commands	461
Per-Port QoS Commands	462
Policy-Based QoS Commands	467
Routing Information Protocol (RIP)	491
Overview	491
Commands	491
Remote Monitoring (RMON)	507
Overview	507
Commands	507
Rapid Spanning Tree Protocol (RSTP)	519
Overview	519
Commands	519
Security	531
Commands	531
AAA Accounting Commands	531
Authorization and Privilege Commands	534
Authentication and Password Commands	537
RADIUS Commands	548
TACACS+ Commands	552
SSH Server and SCP Commands	555
Secure DHCP Commands	566
sFlow	571
Overview	571
Important Points to Remember	571
Commands	572
Simple Network Management Protocol (SNMP) and Syslog	579
Overview	579
SNMP Commands	579
Important Points to Remember	580
Syslog Commands	594
Storm Control	605
Overview	605
Commands	605
Important Points to Remember	605
Stacking Commands	611
Overview	611
Commands	611
Spanning Tree Protocol (STP)	621
Overview	621
System Time and Date	631
Overview	631
Commands	631
Uplink Failure Detection (UFD)	645
Overview	645
Commands	645
VLAN Stacking	655
Overview	655
Important Points to Remember	655
Virtual Router Redundancy Protocol (VRRP)	663
IPv4 VRRP Commands	663
Debugging and Diagnostics	675
Offline Diagnostic Commands	675
Important Points to Remember	675
Buffer Tuning Commands	677
Hardware Commands	682
Internet Control Message Protocol (ICMP) Message Types	695
SNMP Traps	697
Index	701

Match case Limit results 1 per page

IPv4 Routing

297

Example

Figure 15-3.

debug ip packet Command Example (Partial)

Table 15-1.

debug ip packet Command Example Fields

Field

Description

Lists the source address of the packet and the name of the interface (in

parentheses) that received the packet.

Lists the destination address of the packet and the name of the interface

(in parentheses) through which the packet is being sent out on the

network.

len

Displays the packet’s length.

sending

rcvd

fragment

sending broad/multicast proto

unroutable

The last part of each line lists the status of the packet.

TCP src=

Displays the source and destination ports, the sequence number, the

acknowledgement number, and the window size of the packets in that

TCP packets.

UDP src=

Displays the source and destination ports for the UDP packets.

ICMP type=

Displays the ICMP type and code.

IP Fragment

States that it is a fragment and displays the unique number identifying the

fragment (Ident) and the

offset (in 8-byte units)

of this fragment

(fragment offset) from the beginning of the original datagram.

IP: s=10.1.2.62 (local), d=10.1.2.206 (Ma 0/0), len 54, sending

TCP src=23, dst=40869, seq=2112994894, ack=606901739, win=8191 ACK PUSH

IP: s=10.1.2.206 (Ma 0/0), d=10.1.2.62, len 40, rcvd

TCP src=0, dst=0, seq=0, ack=0, win=0

IP: s=10.1.2.62 (local), d=10.1.2.206 (Ma 0/0), len 226, sending

TCP src=23, dst=40869, seq=2112994896, ack=606901739, win=8192 ACK PUSH

IP: s=10.1.2.216 (Ma 0/0), d=10.1.2.255, len 78, rcvd

UDP src=0, dst=0

IP: s=10.1.2.62 (local), d=10.1.2.3 (Ma 0/0), len 1500, sending fragment

IP Fragment, Ident = 4741, fragment offset = 0

ICMP type=0, code=0

IP: s=10.1.2.62 (local), d=10.1.2.3 (Ma 0/0), len 1500, sending fragment

IP Fragment, Ident = 4741, fragment offset = 1480

IP: s=40.40.40.40 (local), d=224.0.0.5 (Te 4/11), len 64, sending broad/multicast

proto=89

IP: s=40.40.40.40 (local), d=224.0.0.6 (Te 4/11), len 28, sending broad/multicast

proto=2

IP: s=0.0.0.0, d=30.30.30.30, len 100, unroutable

ICMP type=8, code=0

IP: s=0.0.0.0, d=30.30.30.30, len 100, unroutable

ICMP type=8, code=0