debugging ip packet

Function

The debugging ip packet command enables the debugging of IP packets.

The undo debugging ip packet command disables the debugging of IP packets.

By default, the debugging of IP packets is disabled.

Format

debugging ip packet [ error ] [ min-length min-length-value ] [ max-length max-length-value ] [ source src-address ] [ destination dest-address ] [ interface { interface-name | interface-type interface-num } ] [ verbose [ verbose-length ] ] [ number packet-number ]

undo debugging ip packet

Parameters

Parameter	Description	Value
error	Displays information about IP error packets.	-
min-length min-length-value	Specifies the minimum length of IP packets.	The value is an integer ranging from 1 to 65535.
max-length max-length-value	Specifies the maximum length of IP packets.	The value is an integer ranging from 1 to 65535.
source src-address	Specifies the source IP address of a specified IP packet.	The value is in dotted decimal notation.
destination dest-address	Specifies the destination address of a specified IP packet.	The value is in dotted decimal notation.
interface interface-type interface-num	Specifies the type and number of an interface.	-
verbose verbose-length	Displays the length of detailed information about IP packets. If the actual packet length is greater than the specified length, the specified length is displayed. If the actual packet length is smaller than the specified length, the actual packet length is displayed.	The value is an integer ranging from 1 to 64, in bytes. The default value is 20.
number packet-number	Specifies the number of debugged IP packets.	The value is an integer ranging from 1 to 65535. The default value is 10.
packet	Indicates IP packets.	-

Views

User view

Default Level

3: Management level

Task Name and Operations

Task Name	Operations
ip-stack	debug

Usage Guidelines

Usage Scenario

To locate problems that occur during IP packet processing, you can run the debugging ip packet command to query debugging information about IP packets.

Example

# Enable the debugging of IP packets, and the following debugging information is displayed.

<HUAWEI> debugging ip packet
2011-08-12 07:16:41 HUAWEI %%01PP4/7/ip_packet(d):CID=6694683;Receiving, ifIndex = 4, vrf = 0, eventId = 0, flag = 0x200, version = 4, headlen = 5, tos = 0, pktlen = 0x4e, pktid = 0xe1b7, offset = 0x0, ttl = 128, protocol = 17, checksum = 0xca, s = 172.16.255.254, d = 172.16.255.255
2011-08-12 07:16:41 HUAWEI %%01PP4/7/ip_packet(d):CID=6694683;Discarding, Reason = Drop packet for ICMP security(1073), ifIndex = 4, vrf = 0, eventId = 0, flag = 0x100200, version = 4, headlen = 5, tos = 0, pktlen = 0x4e00, pktid = 0xe1b7, offset = 0x0, ttl = 128, protocol = 17, checksum = 0xca, s = 172.16.255.254, d = 172.16.255.255
2011-08-12 07:16:42 HUAWEI %%01PP4/7/ip_packet(d):CID=6694683;Receiving, ifIndex = 4, vrf = 0, eventId = 0, flag = 0x200, version = 4, headlen = 5, tos = 0, pktlen = 0x4e, pktid = 0xe1b8, offset = 0x0, ttl = 128, protocol = 17, checksum = 0xc9, s = 172.16.255.254, d = 172.16.255.255

**Table 1** Description of the **debugging ip packet** command output
Item	Description
ifIndex	Interface index.
vrf	VPN ID.
eventId	Event ID.
flag	Flag.
version	Version number.
headlen	Packet header length.
tos	Type of Service (ToS).
pktlen	Packet length.
pktid	Packet identification.
offset	Fragment offset value.
ttl	Time To Live (TTL).
protocol	Protocol number.
checksum	Checksum.
s	Source IP address.
d	Destination IP address.
ip_packet(d)	IP packets.
CID	CID of the current output information.
Receiving	Received packets.
Discarding	Discarded packets.