debugging ip icmp

Function

The debugging ip icmp command enables the debugging of indicates ICMP packets.

The undo debugging ip icmp command disables the debugging of indicates ICMP packets.

By default, the debugging of ICMP packets is disabled.

Format

debugging ip icmp [ verbose [ verbose-length ] ]

undo debugging ip icmp

Parameters

Parameter	Description	Value
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.
icmp	Indicates ICMP packets.	-

Parameter

Description

Value

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.

icmp

Indicates ICMP 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 ICMP packet processing, you can run the debugging ICMP 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 icmp** 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.