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Full Discussion: Stuck ARP entries
Special Forums IP Networking Stuck ARP entries Post 302365939 by Corona688 on Wednesday 28th of October 2009 11:20:30 AM
Old 10-28-2009
Stuck ARP entries

About a week ago a customer hooked up a wireless router backwards to our network, causing it to serve incorrect DHCP addresses to some of them. Our networks are mostly statically assigned so this didn't cause as much damage as it might have, but now, over a week later, I still have incomplete 192.168.10.x entries stuck in the ARP table:
Code:
$ arp -n
Address                  HWtype  HWaddress           Flags Mask            Iface
192.168.20.27            ether   00:60:B3:20:71:32   C                     lan
192.168.20.36            ether   00:15:E9:84:E8:60   C                     lan
192.168.20.64            ether   00:22:5F:14:B4:75   C                     lan
192.168.10.101                   (incomplete)                              lan
192.168.20.33            ether   00:13:4F:00:A2:85   C                     lan
192.168.10.84                    (incomplete)                              lan
208.92.117.109           ether   00:80:AE:97:78:1F   C                     wan
192.168.10.65                    (incomplete)                              lan
192.168.20.46            ether   00:07:E9:BD:FB:79   C                     lan
192.168.10.90                    (incomplete)                              lan
192.168.20.130           ether   00:60:B3:07:10:16   C                     lan
192.168.20.21            ether   00:13:4F:00:40:85   C                     lan
192.168.10.88                    (incomplete)                              lan
192.168.20.43            ether   00:15:E9:32:C4:F1   C                     lan
192.168.20.14            ether   00:13:4F:00:64:FF   C                     lan
$

arp -d cannot delete the incomplete entries, and they won't go away. I suppose they're harmless but I'd get rid of them if I could. Is there any better way than a reboot?
 

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WIRELESS(7)                                                  Linux Programmer's Manual                                                 WIRELESS(7)

NAME
wireless - Wireless Tools and Wireless Extensions SYNOPSIS
iwconfig iwpriv -a DESCRIPTION
The Wireless Extensions is an API allowing you manipulate Wireless LAN networking interfaces. It is composed of a variety of tools and configuration files. It is documented in more detail in the Linux Wireless LAN Howto. The Wireless Tools are used to change the configuration of wireless LAN networking interfaces on the fly, to get their current configura- tion, to get statistics and diagnose them. They are described in their own man page, see below for references. Wireless configuration is specific to each Linux distribution. This man page will contain in the future the configuration procedure for a few common distributions. For the time being, check the file DISTRIBUTIONS.txt included with the Wireless Tools package. DEBIAN 3.0 In Debian 3.0 (and later) you can configure wireless LAN networking devices using the network configuration tool ifupdown(8). File : /etc/network/interfaces Form : wireless-<function> <value> wireless-essid Home wireless-mode Ad-Hoc See also : /etc/network/if-pre-up.d/wireless-tools /usr/share/doc/wireless-tools/README.Debian SuSE 8.0 SuSE 8.0 (and later) has integrated wireless configuration in their network scripts. Tool : Yast2 File : /etc/sysconfig/network/wireless /etc/sysconfig/network/ifcfg-* Form : WIRELESS_<function>=<value> WIRELESS_ESSID="Home" WIRELESS_MODE=Ad-Hoc See also : man ifup info scpm ORIGINAL PCMCIA SCRIPTS
If you are using the original configuration scripts from the Pcmcia package, you can use this method. File : /etc/pcmcia/wireless.opts Form : *,*,*,*) ESSID="Home" MODE="Ad-Hoc" ;; See also : /etc/pcmcia/wireless File PCMCIA.txt part of Wireless Tools package AUTHOR
Jean Tourrilhes - jt@hpl.hp.com http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/ SEE ALSO
iwconfig(8), iwlist(8), iwspy(8), iwpriv(8), iwevent(8). wireless-tools 4 March 2004 WIRELESS(7)
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