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 .

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

— David Gonzalez 2021/04/14 09:20