Yes now I understand that switch should also be configured for bonding. I think bonding is called as ethernet trunking in cisco world which I have found out from: http://lists.debian.org/debian-beowulf/2004/08/msg00022.html and http://www.crazygreek.co.uk/content/bonding_cisco It seems that there is one more > The short answer is yes, bonded pairs offer both performance improvement > and availability. I tend to doubt that most servers with any real > application could process all of the traffic from 2 1gb ethernet ports. > > The network guys here set up 3 Cisco 3750 switches with the high speed > link that ties them together into one large switch. On redhat > enterprise 3, I set up 2 bonded ethernets, each plugged into different > switches. I have noticed that the inbound traffic goes to the first > ethernet, but outbound traffic is round-robin. As I understand it, the > Cisco switches do not do round-robin because there is no efficient way > to keep track of which port received the last packet. It is faster to > send all packets for a bonded ethnet pair to one port. I can pull > either ethernet port and the other will take over the traffic. > > As I understand it, any of the 3 switches can fail and every thing will > stay up. > > Sorry, I have never used a NetApp with ISCSI. > > Matt > > On Sun, 2005-12-18 at 04:20, Omer Faruk Sen wrote: > >> Hi, >> >> Is bonding can be used only for performance improvements or can it be >> also >> used for path availability along with redundant switch (2 switches) >> configuration for iSCSI ? >> >> Also in a paper of netapp (http://www.netapp.com/library/tr/3192.pdf) >> iSCSI configuration is shown as 2 connection for one switch (in NAS >> ISLAND >> Linux Cluster) but in SAN ISLAND (fiber connection and switches) 1 >> connection is being made for one switch which provides path >> availability. >> What I want to ask is how path availability without SPOF can be provided >> with iSCSI solutions? Can I achive it with 2 ethernet card that works >> with >> bonding and each of them is connected to one switch (2 switches is >> configured in cluster)? I think for that I have to use multipath >> (http://christophe.varoqui.free.fr/wiki/wakka.php?wiki=Home) software >> for >> that. Am I right? > -- Omer Faruk Sen http://www.faruk.net -- Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
