Antonio Perez

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======FLUSHING ARP TABLE TAKES AN EXCESSIVELY LONG TIME======



**Symptoms:**
  * Flushing ARP table takes an excessively long time   
  * Customer reports clearing ARP table takes an excessively long time  
  * Telnet session to CB3500 can timeout at client side  
 

**Facts:** 
  * CB3500  
  * CoreBuilder 3500  
  * CoreBuilder 3500 S/W v1.1  
  * ARP table  

**Causes:** The CB3500 continues to route and bridge traffic during the flush operation - on a busy network the flush process can take a long time, long enough to cause the telnet session on the client side to timeout - if this happens you will not be able to reconnect to the CB3500 using telnet until the operation in process ( IP ARP Flush) is completed.  



**Fixes:** __Normal operation on busy network__  

**Workaround** - If there is no issue with traffic not routing or bridging during this operation perform a warm boot instead of a IP ARP Flush - all tables will be cleared and the CB3500 switch should return to normal operation in the shortest amount of time. 

**Workaround telnet timeout** - perform this operation at a console connected to the serial port of the CB3500 instead of a telnet session .

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Product(s):  CoreBuilder  
Sub Product(s): CoreBuilder 3500 Family  





 --- //[[nce@itclatam.com|David Gonzalez]] 2021/04/14 09:20//