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[Freeipmi-devel] garpd (Gratuitous ARP Daemon)


From: Anand Babu
Subject: [Freeipmi-devel] garpd (Gratuitous ARP Daemon)
Date: Thu, 19 May 2005 18:46:25 -0700
User-agent: Gnus/5.1007 (Gnus v5.10.7) Emacs/21.4 (gnu/linux)

For others,
Avati is now working on a user-space gratuitous ARP daemon for mini
BMCs that doesnt support GARPs. You will be able to provide a list of
IP addresses that has to be GARP'd in the config file. If you want to
understand more about GARP, follow these links...
http://www.ultramonkey.org/3/ip_address_takeover.html
http://wiki.ethereal.com/Gratuitous_20ARP

Avati is a very talented free software hacker with rich experience in
networking. 


This is for Avati,
----------------------------------------------------------------------
address@hidden:~# tcpdump -i eth1 host 192.168.1.60 -vv
tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size
96 bytes
18:30:12.969399 arp who-has 192.168.1.60 (Broadcast) tell 192.168.1.60
18:30:15.469184 arp who-has 192.168.1.60 (Broadcast) tell 192.168.1.60
18:30:17.969138 arp who-has 192.168.1.60 (Broadcast) tell 192.168.1.60
18:30:20.469463 arp who-has 192.168.1.60 (Broadcast) tell 192.168.1.60
18:30:22.969169 arp who-has 192.168.1.60 (Broadcast) tell 192.168.1.60
18:30:25.469242 arp who-has 192.168.1.60 (Broadcast) tell 192.168.1.60
18:30:27.969319 arp who-has 192.168.1.60 (Broadcast) tell 192.168.1.60
----------------------------------------------------------------------

Looking at the tcpdump for SR870BN4 (192.168.1.60) (Tiger4 Quad
Itanium2 platform), Intel's Sahalee BMC (IPMI-1.5) uses "Request Based
Gratuitous ARP". So in your initial release of garpd use this approach
We will plan for "Response Based Gratuitous ARP" in the next release.

-- 
Anand Babu 
GPG Key ID: 0x62E15A31
Personal Blog  [http://freedom.freeshell.org]
The GNU Operating System [http://www.gnu.org]




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