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?
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