Enable/Disable Address Table Reset On Specified Port; Enabling/Disabling Arp Address Update - 3Com 8800 Configuration Manual

3Com Switch 8800 Configuration Guide
Table 38-27 Enable/Disable MSTP on a device
Enable MSTP on a device.
Disable MSTP on a device.
Restore the disable state of MSTP, as defaulted.
Only if MSTP has been enabled on the device will other MSTP configurations take
effect. If MSTP is disabled on the device, MSTP cannot be enabled on a port.
By default, MSTP is disabled.

38.2.18 Enable/Disable Address Table Reset on Specified Port

When a TC/TCN packet is received on a port, the system performs whole bridge
traverse decision on the reset-arp enable/disable status. If reset-arp is enabled on the
port, and the STP port is in active state, the system reset the MAC and dynamic ARP
address tables on the port. In the case of TC/TCN entries of instance 0, the system
removes the ARP entries of all instances. In the case of TC/TCN entries of other
instances, the system removes the instance's ARP entry.
By default, this function is disabled.
Perform the following configuration in Ethernet port view.
Table 38-28 Enable/disable the reset of MAC and dynamic ARP address tables on a
port
Enable/Disable the reset of MAC and dynamic
ARP address tables on a port of the device
By default, this function is disabled.

38.2.19 Enabling/Disabling ARP Address Update

ARP update is based on the following hypothesis: There are lots of bidirectional
multicast and broadcast packets in the actual network. After the network topology
changes, the MAC and ARP addresses may become invalid if the system does not
delete ARP and MAC entries. However, if the peer sends a multicast or broadcast
packet, the local port will learn ARP and MAC addresses. Then the system can find the
corresponding ARP entries and update these entries according to the new port
correspondence. This planning is also called: ARP address updates with MAC address.
The stp update-arp command can be executed in the system view for the system to
determine whether to adopt ARP address update flexibly. If ARP address update is
Operation
Operation
38-33
Chapter 38 MSTP Region-configuration
Command
stp enable
stp disable
undo stp
Command
stp reset-arp {
disable }
enable |