l2protocol-tunnel drop-threshold

Function

The l2protocol-tunnel drop-threshold command sets the drop threshold of Layer 2 protocol packets that are transparently transmitted on an interface.

The undo l2protocol-tunnel drop-threshold command cancels the setting of the drop threshold.

By default, the drop threshold of Layer 2 protocol packets that are transparently transmitted on an interface is 0 pps. The rate of Layer 2 protocol packets is not limited on the interface.

Format

l2protocol-tunnel drop-threshold rate [ { protocol-type } &<1-16> | user-defined-protocol protocol-name ]

undo l2protocol-tunnel drop-threshold [ { protocol-type } &<1-16> | user-defined-protocol protocol-name } ]

undo l2protocol-tunnel drop-threshold rate { protocol-type | user-defined-protocol protocol-name }

Parameters

Parameter	Description	Value
rate	Specifies the drop threshold of Layer 2 protocol packets that are transparently transmitted on an interface.	The value is an integer that ranges from 1 to 4096, in pps.
protocol-type	Specifies the type of a Layer 2 protocol. The interface discards excess packets of this type of protocol when the rate of these packets exceeds the drop threshold. NOTE: You can specify multiple protocols in the command.	The protocol type can be: Spanning Tree Protocol (STP) Link Aggregation Control Protocol (LACP) Ethernet Operation, Administration, and Maintenance 802.3ah (EOAM3ah) Link Layer Discovery Protocol (LLDP) GARP VLAN Registration Protocol (GVRP) GARP Multicast Registration Protocol (GMRP) HUAWEI Group Management Protocol (HGMP) VLAN Trunking Protocol (VTP) Unidirectional Link Detection (UDLD) Port Aggregation Protocol (PAGP) Cisco Discovery Protocol (CDP) Per VLAN Spanning Tree Plus (PVST+) Shared Spanning Tree Protocol (SSTP) Dynamic Trunking Protocol (DTP) Device Link Detection Protocol (DLDP) Ethernet Synchronization Message Channel (ESMC) You can select one or more Layer 2 protocols.
user-defined-protocol protocol-name	Sets the drop threshold of packets of a user-defined Layer 2 protocol. protocol-name specifies the name of a user-defined protocol.	The value is a string of 1 to 31 characters without spaces. When double quotation marks are used around the string, spaces are allowed in the string.

Parameter

Description

Value

rate

Specifies the drop threshold of Layer 2 protocol packets that are transparently transmitted on an interface.

The value is an integer that ranges from 1 to 4096, in pps.

protocol-type

Specifies the type of a Layer 2 protocol. The interface discards excess packets of this type of protocol when the rate of these packets exceeds the drop threshold.

NOTE:

You can specify multiple protocols in the command.

The protocol type can be:

Spanning Tree Protocol (STP)
Link Aggregation Control Protocol (LACP)
Ethernet Operation, Administration, and Maintenance 802.3ah (EOAM3ah)
Link Layer Discovery Protocol (LLDP)
GARP VLAN Registration Protocol (GVRP)
GARP Multicast Registration Protocol (GMRP)
HUAWEI Group Management Protocol (HGMP)
VLAN Trunking Protocol (VTP)
Unidirectional Link Detection (UDLD)
Port Aggregation Protocol (PAGP)
Cisco Discovery Protocol (CDP)
Per VLAN Spanning Tree Plus (PVST+)
Shared Spanning Tree Protocol (SSTP)
Dynamic Trunking Protocol (DTP)
Device Link Detection Protocol (DLDP)
Ethernet Synchronization Message Channel (ESMC)

You can select one or more Layer 2 protocols.

user-defined-protocol protocol-name

Sets the drop threshold of packets of a user-defined Layer 2 protocol. protocol-name specifies the name of a user-defined protocol.

The value is a string of 1 to 31 characters without spaces.

When double quotation marks are used around the string, spaces are allowed in the string.

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

After enabling Layer 2 protocol tunneling on an interface, you can run the l2protocol-tunnel drop-threshold command on this interface to set the drop threshold of protocol packets.

After Layer 2 protocol tunneling is enabled and the drop threshold of Layer 2 protocol packets is set on an interface, the interface drops excess Layer 2 protocol packets when the drop threshold is exceeded. If the trap function is enabled, the device sends a trap message to the NMS to notify the network administrator.

When using the l2protocol-tunnel drop-threshold command, pay attention to the following points:

If no Layer 2 protocol is specified, the drop threshold applies to all Layer 2 protocol packets that need to be transparently transmitted.
If a Layer 2 protocol is specified, the interface discards excess packets of the protocol when the rate of these packets exceeds the drop threshold.
If you run this command without specifying a protocol, and then run the command with a specified protocol, the drop threshold that you set the second time takes effect.

Example

# Set the drop threshold of STP packets that are transparently transmitted on GE0/0/1 to 10 pps.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] l2protocol-tunnel stp enable
[HUAWEI-GigabitEthernet0/0/1] l2protocol-tunnel drop-threshold 10 stp