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Raisecom
ISCOM2600G-HI (A) Series Configuration Guide
Step
2
3
2.7.19 Configuring interface loopguard
The spanning tree has two functions: loopguard and link backup. Loopguard requires carving
up the network topology into tree structure. There must be redundant links in the topology if
link backup is required. Spanning tree can avoid loop by blocking the redundant link and
enable link backup function by opening redundant link when the link breaks down.
The spanning tree module exchanges packets periodically, and the link has failed if it has not
received packet in a period. Then select a new link and enable backup interface. In actual
networking, the cause to failure in receiving packets may not link fault. In this case, enabling
the backup interface may lead to loop.
Loopguard is used to keep the original interface status when it cannot receive packet in a
period.
Loopguard and link backup are mutually exclusive; in other words, loopguard is
implemented on the cost of disabling link backup.
Configure interface loop protection for the ISCOM2600G-HI series switch as below.
Step
1
2
3
2.7.20 Configuring TC packet suppression
When the topology of the user access network changes, the forward address of the core
network will be updated. When the topology becomes unstable, it will affect the core network.
To avoid unstable topology, you can configure TC packet suppression on the interface. In this
case, after the interface receives a TC packet, it will not forward the TC packet to other
interfaces.
Configure TC packet suppression for the ISCOM2600G-HI series switch as below.
Command
Raisecom(config)#interface
interface-type interface-number
Raisecom(config-
gigaethernet1/1/port)#spanning-tree
rootguard enable
Command
Raisecom#config
Raisecom(config)#interface
interface-type interface-number
Raisecom(config-
gigaethernet1/1/1)#spanning-tree
loopguard enable
Raisecom Proprietary and Confidential
Copyright © Raisecom Technology Co., Ltd.
Description
Enter physical layer interface
configuration mode.
Enable/Disable root interface
protection.
Description
Enter global configuration mode.
Enter physical layer interface
configuration mode.
Configure interface loopguard
attributes.
2 Ethernet
110
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