G/D/C3/B3-Series f/w 6.03.02.0006 cannot Delete a Static ARP Entry

  • 0
  • 1
  • Article
  • Updated 5 years ago
  • (Edited)
Article ID: 12781 

Products
G-Series; firmware 6.03.00.0022 through 6.03.05.0004
D-Series; firmware 6.03.01.0008 through 6.03.05.0004
C3-Series, firmware 6.03.00.0022 through 6.03.05.0004
B3-Series; firmware 6.03.00.0022 through 6.03.05.0004 

Changes
Statically configured an Address Resolution Protocol (ARP) IP Address-to-MAC Address binding in switch mode ('set arp...').
Then attempted to delete the resulting ARP entry ('clear arp...'). 

Symptoms
Clearing a switch mode Static ARP entry does not fully delete it.
The ARP entry is deleted from running memory (DRAM) but not from the configuration stored in non-volatile flash memory.
The ARP entry no longer appears in the output of a 'show arp' but continues to appear in the output of a 'show config'. 
Attempting to again delete the ARP entry yields a "Failure: Unable to delete ARP entry." error, because the binding no longer exists in DRAM. 

For example: 
C3(su)->set arp 10.20.0.223 00-11-22-33-44-55
C3(su)->show arp

LINK LEVEL ARP TABLE
IP Address Phys Address Flags Interface
---------------------------------------------------------
10.20.0.90 00-1a-a0-a7-e7-a8 host
10.20.0.223 00-11-22-33-44-55 S host
---------------------------------------------------------

C3(su)->show config arp
This command shows non-default configurations only.
Use 'show config all' to show both default and non-default configurations.

begin
!
#***** NON-DEFAULT CONFIGURATION *****
!
!
# Firmware Revision: 06.03.00.0022
!
!

#arp
set arp 10.20.0.223 00-11-22-33-44-55
!
end

C3(su)->clear arp 10.20.0.223
arp: 10.20.0.223 deleted.
C3(su)->show arp

LINK LEVEL ARP TABLE
IP Address Phys Address Flags Interface
---------------------------------------------------------
10.20.0.90 00-1a-a0-a7-e7-a8 host
---------------------------------------------------------

C3(su)->show config arp
This command shows non-default configurations only.
Use 'show config all' to show both default and non-default configurations.

begin
!
#***** NON-DEFAULT CONFIGURATION *****
!
!
# Firmware Revision: 06.03.00.0022
!
!

#arp
set arp 10.20.0.223 00-11-22-33-44-55
!
end

C3(su)->clear arp 172.26.2.222
Failure: Unable to delete ARP entry.
C3(su)->
Solution
Upgrade to firmware 6.03.06.0008 or higher.
Release notes state, in the 'Firmware Changes and Enhancements' section:
13392   Resolved an issue whereby static ARP entries were displayed in the configuration file after being administratively removed.
Photo of FAQ User

FAQ User, Official Rep

  • 13,610 Points 10k badge 2x thumb

Posted 5 years ago

  • 0
  • 1

There are no replies.

This conversation is no longer open for comments or replies.