Meaning of the (incomplete) ARP Command Result

Products

• Advanced Secure Gateway Software - ASG
• ASG-S200
• ASG-S400
• ASG-S500
• SG-300
• SG-600
• SG-510
• SG-810
• SG-9000
• SG-900
• SG-S500
• SG-S400
• Secure Web Gateway Virtual Appliance
• SG-S200
• ProxySG Software - SGOS
• SWG VA-100

Issue/Introduction

This article describes the meaning of the "(incomplete)" message while reviewing the proxy ARP table.

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; TCP/IP Statistics

TCP/IP ARP Information
Routing domain default

IP Address       MAC Address       Interface
10.10.10.9       (incomplete)      1:1.50                     <------ Incomplete Result
10.10.10.10      00:03:d2:f1:2b:03 0:0 
Proxy#

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Note: You can also see this via the CLI command: "show ip-route-table".

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TCP/IP ARP Information
URL_Path /TCP/ARP
; TCP/IP Statistics

TCP1.7 

Routing domain default

IP Address       MAC Address       Interface
10.10.10.1       a1:36:9f:14:03:61 aggr:0
10.10.10.2       a2:36:9f:14:03:12 aggr:0
10.10.10.3       03:11:0a:6c:61:73 aggr:0
10.10.10.4       04:11:0a:6c:67:b4 aggr:0
10.10.10.5       05:e0:ed:7d:58:a5 aggr:0
10.10.10.6       (incomplete)      aggr:0                      <------ Incomplete Result
10.10.10.7       06:e0:ed:7d:58:a6 aggr:0
10.10.10.8       07:00:0c:07:ac:07 aggr:0

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Cause

When there is a duplicate IP address in the network the Proxy's arp related commands respond with an "x.x.x.x (incomplete)" message.

Resolution

Find the duplicate IP address and remove or correct it. 

Note: You can verify that the issue is no longer experienced by running the ARP related commands again and inspecting .

IP Address       MAC Address       Interface
10.10.10.1       a1:36:9f:14:03:61 aggr:0
10.10.10.2       a2:36:9f:14:03:12 aggr:0
10.10.10.3       03:11:0a:6c:61:73 aggr:0
10.10.10.4       04:11:0a:6c:67:b4 aggr:0
10.10.10.5       05:e0:ed:7d:58:a5 aggr:0
10.10.10.7       06:e0:ed:7d:58:a6 aggr:0
10.10.10.8       07:00:0c:07:ac:07 aggr:0