ZXR10 2900E Series Configuration Guide
--------------------------------------------------------------------------------
port-19
00d0d0092918 110
B S
ZXR10 2918E-PS
port-9
Unknown
Version V2.05..
zte(cfg)#show lldp entry
--------------------------------------------------------
Local Port:port-19
Chassis ID:00d0d0092918 (MAC Address)
Port ID
:port-9 (Interface Name)
TTL ID
:100 (Time to live)
Port Description
:port-9 status is up,media-type is 100BaseT,pvid is 1.
System Name
:zte
System Description:ZXR10 2918E-PS Version V2.05.10.B10
System Capability :Bridge Switch
4.36 Single Port Loop Detection Configuration
Single Port Loop Detection Overview
Single port loop detection is to check whether a loop exists in the ports of the switch. If such
a loop exists, it may result in errors in learning MAC addresses and may easily cause a
broadcast storm. In severe case, switch and network may be down. Starting the single port
loop detection and disabling the port with loop can efficiently avoid the influence caused
by port loop.
The switch sends a test packet through a port. If this test packet is received through the
port without any change (or only a tag is attached), it indicates that a loop exists in this
port.
The test packet sent by the switch includes the following three parameters:
l
Source MAC address: It indicates the MAC address of the switch. The MAC address
of each switch is unique.
l
Port Number: Port numbers correspond to the numbers of the ports on the switch one
by one.
l
Discrimination Field: For each switch, the digital signature of each port is different.
When three parameters in the receiving and sending test packets are same, the loop
definitely exists on this port.
Configuring Single Port Loop Detection
The configuration of single port loop detection includes the following contents:
Command
Function
zte(cfg)#
set loopdetect sendpktinterval
<
5-60
>
Sets the interval for sending loop
detection packet.
4-128
SJ-20120409144109-002|2012-07-02(R1.0)
ZTE Proprietary and Confidential
