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CloudEngine 12800 and 12800E V200R019C10 Configuration Guide - Ethernet Switching
This document describes the configuration of Ethernet services, including configuring MAC address table, link aggregation, M-LAG, VLAN, QinQ, VLAN mapping, GVRP, STP/RSTP, MSTP, VBST, ERPS (G.8032), LBDT, and Layer 2 protocol transparent transmission.
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(Optional) Enabling State Flapping Suppression on an Eth-Trunk
(Optional) Enabling State Flapping Suppression on an Eth-Trunk
Context
If the state of an Eth-Trunk frequently flaps, the LACP protocol status of the Eth-Trunk also flaps, affecting the Eth-Trunk operations. To resolve this problem, enable the state flapping suppression function on the Eth-Trunk working in LACP mode.
After LACP negotiation
succeeds on an Eth-Trunk interface, the interface will save the source
MAC address of the most recently received packet, and will check the
source MAC addresses of packets. If the Eth-Trunk interface receives
a packet with the source MAC address being different from the one
which saved, the Eth-Trunk may be flapped because the once more negotiation.
To prevent an Eth-Trunk
interface from alternating between Up and Down, enable the invalid-MAC-based
flapping suppression function on the Eth-Trunk interface working in
LACP mode. After this function is enabled, the Eth-Trunk interface
drops the packet and records the packet information if receiving a
packet with the source MAC address being different from the valid
one. In this manner, the Eth-Trunk interface does not alternate between
Up and Down even if packet flapping occurs.
Procedure
Enable the state flapping suppression function on an Eth-Trunk.
Run system-view
The system view is displayed.
Run interface eth-trunktrunk-id
The Eth-Trunk interface view is displayed.
Run lacp dampening state-flapping
The state flapping suppression function is enabled on the Eth-Trunk.
By default, the state flapping suppression function is disabled on an Eth-Trunk.
Run commit
The configuration is committed.
Enable the invalid-MAC-based state flapping suppression function on an Eth-Trunk.
Run system-view
The system view is displayed.
Run interface eth-trunktrunk-id
The Eth-Trunk interface view is displayed.
Run undo lacp dampening unexpected-mac disable
The invalid-MAC-based state flapping suppression function is enabled on the Eth-Trunk.
By default, the invalid-MAC-based state flapping suppression function is enabled on an Eth-Trunk.
