Sponsored Content
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?
 

10 More Discussions You Might Find Interesting

1. Solaris

ARP Cache

Dear all, We are testing two of our servers for mq series connectivity. The scenario is, when one machine is shutting down it's services there are some scripts that do a dns update, which removes the ip address and relates it to the ip address of the other node on our dns server, and the update... (7 Replies)
Discussion started by: earlysame55
7 Replies

2. IP Networking

ARP Req Pkt

Does ARP Request packet Contains MAC Address of dest during broadcast? I found It So... When i captured ARP Req Pkts on ethereal... Rgds -Meti (1 Reply)
Discussion started by: ashokmeti
1 Replies

3. HP-UX

HW Address and arp

I was checking nettl output for a unstable telnet to my server. this is part of output: ### ***********************************STREAMS/UX*******************************@#% Timestamp : Sun Jun 22 EETDST 2008 22:14:47.492899 Process ID : Subsystem ... (4 Replies)
Discussion started by: xramm
4 Replies

4. Solaris

Printer Entries stuck "finished printing"

On Solaris 8, when I do a lpstat -o: I have tried cancel 140828p-16974, but the entries remain New prints to this printer and others work successfully. Can anyone suggest how to get rid of these entries. Thanks (2 Replies)
Discussion started by: pmm
2 Replies

5. Red Hat

Arp Problem

Dear All i have a linux proxy server which has RHEL-5 64 bit, it has two interfaces, it has the following details eth0=10.200.14.42 eth3=10.201.14.42 default gateway=10.201.14.254 one static route=192.168.0.0/24 gw 10.200.14.254 i am facing a problem when i ping 10.201.14.42 from... (2 Replies)
Discussion started by: surfer24
2 Replies

6. UNIX for Advanced & Expert Users

Monitoring the arp table

Man page of netlink says: --------------------------------- NETLINK_ARPD For managing the arp table in user space. ---------------------------------- Is it possible to monitor arp table using Netlink? or it's just for manipulating? (1 Reply)
Discussion started by: xyzt
1 Replies

7. UNIX for Advanced & Expert Users

arp questions

Can someone please explain this output to me. Why doesn't ifconfig show the same info? ~ $ arp -a ? (10.71.0.1) at 00:1b:21:2b:eb:0c on eth0 (4 Replies)
Discussion started by: cokedude
4 Replies

8. IP Networking

Protection against arp spoofing

Hi, I'm trying to find a way to protect my network against arp spoofing. What it is: An attacker sends fake arp packets in the network, identifying himself as the router. All network traffic is then redirected to this attacker. How to protect myself: In my opinion, the best possible... (2 Replies)
Discussion started by: chrisperry
2 Replies

9. IP Networking

necessary ARP request?

Hello, I have 2 clients with Unix installed. host1: eth0 (192.168.5.10) & eth1 (192.168.10.10) host2: eth0 (192.168.10.20) I've connected host1-eth1 to host2-eth0. host1-eth0 isn't connected. I started 'tcpdump' on wonder that host2 got ARP requests for 192.168.5.10. Any idea why host1... (2 Replies)
Discussion started by: daWonderer
2 Replies

10. War Stories

What arp -s is good for

A customer appears to have drastically misunderstood our instructions for connecting to our WAN. He set his PC IP address to the same as one of the bridges. :mad: :wall: This caused much confusion on the network, to put it mildly. He called to complain about the poor performance of the network... (13 Replies)
Discussion started by: Corona688
13 Replies
prtdscp(1M)						  System Administration Commands					       prtdscp(1M)

NAME
prtdscp - display DSCP IP addresses SYNOPSIS
prtdscp [-v ] prtdscp [-v ] -h prtdscp [-v ] -d prtdscp [-v ] -s DESCRIPTION
prtdscp displays the IP addresses associated with a Domain to Service Processor Communications Protocol (DSCP) link. If no arguments are specified, prtdscp displays the IP addresses on both ends of the DSCP link. The IP address of either the Service Processor or domain side can be displayed separately by the use of the -s or -d options, respectively. OPTIONS
The following options are supported: -v Verbose mode. Print additional details about the program's internal progress to stderr. -h Help. Print a brief synopsis of the program's usage and exit. All other command line arguments are ignored. -d Display only the local domain's IP address. -s Display only the remote Service Processor's IP address. EXAMPLES
Example 1 Displaying both addresses The following example displays both the local domain's IP address and the remote SP's IP address: # prtdscp Domain Address: 192.168.103.2 SP Address: 192.168.103.1 Example 2 Displaying the local IP address The following example displays the local domain's IP address: # prtdscp -d 192.168.103.2 Example 3 Displaying the remote IP address The following example display the remote SP's IP address: # prtdscp -s 192.168.103.1 ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWdscpr.u, SUNWdscpu.u | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5) SunOS 5.11 25 Apr 2006 prtdscp(1M)
All times are GMT -4. The time now is 07:33 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy