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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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LEARN ABOUT DEBIAN

aggregate-ios

AGGREGATE-IOS(1)					      General Commands Manual						  AGGREGATE-IOS(1)

NAME

       aggregate-ios - optimise a concatenated set of cisco/IOS prefix filters to help make them nice and short.

SYNOPSIS

       aggregate-ios <source_config >optimised_config

DESCRIPTION

       Takes  cisco IOS configuration on stdin, and optimises any prefix filters found using aggregate(1).  Optimised filters are produced on std-
       out.

OPTIONS

       None.

DIAGNOSTICS

       Any diagnostics produced by aggregate(1) are passed through on stderr.

EXAMPLES

       The following configuration fragment:

	 ip prefix-list AS65530 description Foo, Inc
	 ip prefix-list AS65530 permit 10.1.0.0/16
	 ip prefix-list AS65530 permit 10.2.0.0/16
	 ip prefix-list AS65530 permit 10.2.1.0/24
	 ip prefix-list AS65530 permit 10.3.0.0/16
	 ip prefix-list AS65531 description Bar.Com
	 ip prefix-list AS65531 seq 5 permit 192.168.1.0/24
	 ip prefix-list AS65531 seq 10 permit 192.168.2.0/24
	 ip prefix-list AS65531 seq 15 permit 192.168.0.0/19

       is optimised as follows:

	 ip prefix-list AS65530 permit 10.1.0.0/16 le 24
	 ip prefix-list AS65530 permit 10.2.0.0/15 le 24
	 ip prefix-list AS65531 permit 192.168.0.0/19 le 24

SEE ALSO

       aggregate(1)

HISTORY

       Aggregate-ios was written by Joe Abley <jabley@mfnx.net>.

BUGS

       All those in aggregate(1) and then some :)

Joe Abley							 2000 November 27						  AGGREGATE-IOS(1)
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