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Knowledge Base

FAQ-How does S9300 open MAC flapping circle check function

Publication Date:  2012-10-23  |   Views:  153  |   Downloads:  0  |   Author:  c00222574  |   Document ID:  EKB1000017996

Contents

Issue Description

Q: How does S9300 open MAC flapping circle check function? How to look over address flapping information?

Alarm Information

NULL

Handling Process


A: MAC flapping circle check function is closed by default, open it by command, it is effective within one period of time. The function will be canceled automatically when time is up.
1. Open MAC flapping circle check
[S9300-hidecmd]mac-flapping check enable ?
  H-H-H            Mac Flapping Check MAC
  INTEGER<1-3600>  Mac Flapping Check Time
  <cr>   
The effective time of this function is counted by seconds, default by 300s. if it appoint the MAC address, when check whether MAC is flapping, it only for this mac address. If it did not appoint, check all mac address.
2. Display MAC flapping count time
When open MAC flapping circle check function, it did not appoint to MAC address, it displays as follows:
[S9300-hidecmd]display mac-flapping statistics
------------------------
Slot    Total          
------------------------
  3      17400  
------------------------
Total Flapping:17400
It means NO.3 board appeared 17400 times MAC flapping phenomenas in appointed time.
When open MAC flapping circle check function, appoint MAC address, it shows as follows:
[S9300-hidecmd]display mac-flapping statistics
------------------------
Slot    Total          
------------------------
  3      1400  
------------------------
Total Flapping:1400          MAC:0001-0002-0003

This means mac address 0001-0002-0003 appeared 1400 times mac flapping phenomenas in appointed time on NO.3 slot.

3. Display flapping MAC table information
Export flapping MAC information by debug mode, after enable debug command, enable terminal debugging and terminal monitor command for exporting information to console. Display flapping mac table information as follows:
[S9300-hidecmd]debugging mac-flapping check
[S9300-hidecmd]return
<S9300>t d
<S9300>t m
<S9300>
*0.2208067 S9300 L2IF_MAC/7/MACFLAPPING:MAC-Flapping Mac: 0014-2261-2a2d, IfName: GigabitEthernet3/0/1, Vlan: 1, Slot: 3
*0.2209067 S9300 L2IF_MAC/7/MACFLAPPING:MAC-Flapping Mac: 0014-2261-2a2d, IfName: GigabitEthernet3/0/1, Vlan: 1, Slot: 3

Root Cause

NULL

Suggestions

The function needs S9300V100R001C02B125 and its later version support, single interface circle check function need SPH008 mend support.