> -----Original Message----- > From: open-iscsi@googlegroups.com [mailto:open-is...@googlegroups.com] On > Behalf Of Benjamin Li > Sent: Wednesday, November 03, 2010 4:05 PM > To: Mike Christie > Cc: open-iscsi@googlegroups.com; Anish Bhatt; Eddie Wai > Subject: Re: case sensitivity of hardware addresses & vlan configs > > Hi Anish, > > For the current the Broadcom solution using VLAN's, we currently have > the use the standard Linux tool, vconfig to create a VLAN interface. > This doesn't give much flexability, so we are working on a solution to > utlize the existing "iface.subnet_mask" and "iface.vlan" fields so that > users can specify multiple VLAN's configurations via multiple ifaces > files. This way the iSCSI offload solution doesn't have to have any > dependency on the L2 interface. My colleague Eddie Wai, is working on > this solution. This is a perfect time to discuss a common solution. >
Hi, Perfect timing indeed. I am presenting a topic which discusses vlan management for CNAs, offload adapters and NICs in the context of DCB and the various bridged switching modes that you could apply in a VM to VM configuration here http://www.linuxplumbersconf.org/2010/ocw/proposals/843. We have observed that vlan management is increasingly becoming a challenge while networking VMs. I was about to suggest that vconfig could become the defacto tool for vlan management among different classes of CNAs. But it does sound like we are moving differently here. One of the thought is to move vconfig away from /net and thus provide a generic ioctl interface for vlan management among different class of Ethernet adapters. -Shyam Iyer > Adding Eddie to the thread, > > Thanks again. > > -Ben > > On Wed, 2010-11-03 at 12:36 -0700, Mike Christie wrote: > > ccing Ben Li from Broadcom. > > > > > > On 11/02/2010 06:42 PM, Anish Bhatt wrote: > > > MAC addresses specified in iface files are currently case sensitive. > > > This can be an issue on vlan interfaces, as isciadm -m iface does not > > > create config files for vlan interfaces and they need to be written > > > manually. Attached patch will convert uppercase MAC addresses to lower > > > case after reading them (iscsiadm expects them in lower case only). > > > > > > > > > > > > There seems to be another issue with VLAN interfaces. Interface files > > > for offloaded vlan interfaces (on chelsio cards atleast) need a hardware > > > address to be specified to work. As of now, iscsiadm does not catch this > > > > So for software iscsi and vlans, you just need to specify the netdev > > vlan name (for example eth0.1 for the iface.net_ifacename). You do not > > need to set the hwaddress/mac in the iface. > > > > iscsiadm does not catch what you need for offload because I had no idea > > you were doing this. > > > > For chelsio offload how are you guys specifying things when vlans are > > used and what does cxgb3i export? Do you have to create a vlan with the > > normal linux tools like vconfig first, then for the net_ifacename are > > you specifying the vlan name created by vconfig? > > cxgbi_device_find_by_netdev then matches the names with the real netdev? > > > > Why do you need to pass in the hardware address? > > > > > > There was talk about adding a vlan id: > > http://groups.google.com/group/open- > iscsi/browse_thread/thread/7ee3b5bb5502871b/37fe62da7d1ffa4e?lnk=gst&q=Using+IFACE_SUBNET_MASK+and+IFA > CE_VLAN#37fe62da7d1ffa4e > > so we could have a more common way of specifying the vlan to be used. > > > > > > > and will simply fail. This is already noted in the readme, but would > > > > What note in the readme are you referring to? > > > > > there be any interest in adding functionality to 'iscsiadm -m iface' to > > > handle vlan interfaces, or warn about missing hwaddress keys when it > > > comes to offloaded vlan interfaces ? > > > > > > -Anish > > > > > > > > > > > > > > > > -- > You received this message because you are subscribed to the Google Groups > "open-iscsi" group. > To post to this group, send email to open-is...@googlegroups.com. > To unsubscribe from this group, send email to > open-iscsi+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/open-iscsi?hl=en. -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to open-is...@googlegroups.com. To unsubscribe from this group, send email to open-iscsi+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/open-iscsi?hl=en.
