sudo arp -s 192.168.1.254 00:20:78:xx:xx:xx drop the sudo part if you are root, use MAC Address of router for 2nd param that will force the right MAC addr. If you can ping from router to 192.168.1.1, that should update the arp cache with the correct entry as well.

Jan 25, 2008 How do I clear arp Cache? - Microsoft Community Apr 07, 2012 Ethical Hacking - ARP Poisoning - Tutorialspoint ARP spoofing constructs a large number of forged ARP request and reply packets to overload the switch. The switch is set in forwarding mode and after the ARP table is flooded with spoofed ARP responses, the attackers can sniff all network packets. Attackers flood a target computer ARP cache with forged entries, which is also known as poisoning Unable to ping until arp cache cleared - Page 4 - Cisco

Flushing the ARP Cache allows new information to be gathered and stored in the ARP Cache. Navigate to Network > ARP > Click Flush ARP Cache to clear the information. To configure a specific length of time for the entry to time out, enter a value in minutes in the ARP Cache entry time out (minutes) field.

If nothing is passed all entries will be displayed. -d hostname, –delete hostname: Removes any entry for the specified host. If any host is down, there is no need of keeeping its entry in arp cache so this command is used to delete those entries explicitly by the user. linux - Clear arp cache - Server Fault Browse other questions tagged linux cache arp or ask your own question. The Overflow Blog Podcast 254: Code Newbie talks education and community on the web Best Ways to Flush Routing Table from Cache on Linux

sss_cache -u user1 For further information, see the sss_cache manual page. Deleting Cache Files. SSSD stores its cache files in the /var/lib/sss/db/ directory. While using the sss_cache command is preferable, it is also possible to clear the cache by simply deleting the corresponding cache files.

ARP spoofing constructs a large number of forged ARP request and reply packets to overload the switch. The switch is set in forwarding mode and after the ARP table is flooded with spoofed ARP responses, the attackers can sniff all network packets. Attackers flood a target computer ARP cache with forged entries, which is also known as poisoning Unable to ping until arp cache cleared - Page 4 - Cisco Unable to ping until arp cache cleared We really need to know how the Linux setup is meant to work. This is not (according to your description) a single server that is teamed, this is two servers running some sort of HA software that presents them as one VIP so packets going to that VIP are spread among the two physical servers. Guide to IP Layer Network Administration with Linux – E&B This guide provides an overview of many of the tools available for IP network administration of the linux operating system, kernels in the 2.2 and 2.4 series. It covers Ethernet, ARP, IP routing, NAT, and other topics central to the management of IP networks. Table of Contents. Introduction. 1. Target Audience, Assumptions, and Recommendations 2. [Solved] Lab Exercise - ARP Objective To see how ARP