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Full Discussion: Vio Build
Operating Systems AIX Vio Build Post 302540560 by johnf on Thursday 21st of July 2011 04:24:09 AM
Old 07-21-2011
Quote:
Originally Posted by mk8570
Another question, I got the installation of the dual vios working and

I am trying to understand how the extenal connectivity from the VIO Client LPAR works in a VIOS environment.

I will appreciate if someone can explain this.

Below is how interfaces are setup in the VIOS server

VIOS 1 --- similar setup is for VIOS 2

ent0, ent2 __ etherchannel ( ent6 ) --- ent4 (Virtual) --- ent7 (SEA)
----ent5 (Ctrl chan)

ent1 -- Has a I/P address bound

Now, If a client LPAR needs to send packets to a external address, how are the packets routed to the extenal network.

Will the packets go from Client LPAR (Virtual Ethernet) --->vios ENT7 - ENT4 - ENT1.

This is the best explanation I can give you. Consider a situation where you have a VLAN (100 for this example) then this VLAN will exist as physical and virtual (in the Hypervisor). Your example above would result in ent0 and ent2 would be connected to the physical VLAN and by virtue of the etherchannel construction ent6 is also connected.

The command:
Code:
mkvdev -sea ent6 -vadapter ent4 -default ent4 -defaultid 100 -attr ha_mode=auto ctl_chan=ent5

the -defaultid 100 flag sets the VLAN id to 100 for this virtual adapter.

would result in the ent7 adapter being created. This is the virtual adapter which would carry the virtual VLAN address for LPAR communication through the VIO servers. Both VIO servers would have the same characteristics set so there would be identical Ethernet adpaters on both VIOS but the trunk priority would be set to alternate values (1, 2 etc).

When creating the Ethernet adapter on the client LPAR one selects the VLAN 100 on the drop down menu on the HMC on both VIO servers. As the adapters on the VIO server have been configured to talk on VLAN 100 nothing else needs to be done except allocating an IP address when the LPAR is powered on. No IP address needs to be added to the VIO virtual ethernet adapter.

All traffic to the outside world from the client LPAR would be as follows:

Client LPAR Ethernet adpater ent0 > along the Hypervisor VLAN 100 > into the VIO server SEA ent7 > Upto the virtual adapter ent4 > through the etherchannel adapter ent6 > finally out of ent0 and ent2 to the real network infrastructure.

This unfortunately is the hardest part of VIO construction to get your head around!
 

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FIPVLAN(8)							  Open-FCoE Tools							FIPVLAN(8)

NAME
fipvlan - Fibre Channel over Ethernet VLAN Discovery SYNOPSIS
fipvlan [-c|--create] [-s|--start] interfaces fipvlan -a|--auto [-c|--create] [-d|--debug] [-s|--start] [-l|--link-retry <num>] fipvlan -h|--help fipvlan -v|--version DESCRIPTION
The fipvlan command performs Fibre Channel over Ethernet (FCoE) Initialization Protocol (FIP) VLAN Discovery over Ethernet interfaces. fipvlan can be used as a diagnostic tool to determine which VLANs have FCoE services available on a network, prior to configuring VLAN interfaces and the Open-FCoE initiator. fipvlan can also be used to create VLAN interfaces as they are discovered, and to start the Open-FCoE initiator. The --create and --start options are primarily intended to be used as part of an Open-FCoE boot solution. FCoE instances started in this way cannot be destroyed or reset by fcoeadm. fipvlan takes a list of network interface names to run the VLAN discovery protocol over, or the --auto option to use all available Ethernet interfaces. fipvlan will enable any interface which is found to be not enabled by the time the program runs. If no response is received on that interface it will be shutdown again when fipvlan terminates. OPTIONS
-a, --auto Use all Ethernet interfaces currently available -c, --create Create network interfaces for discovered FCoE VLANs. If a VLAN device already exists for a discovered VLAN, a new VLAN device will not be created. -d, --debug Enable debugging output -s, --start Start the Open-FCoE initiator on discovered FCoE VLANs -f, --suffix <suffix string> Append the specified string <suffix string> to VLAN interface names. -l, --link-retry <number of retries> Retry check for link up up to <number of retries> times. The link state is retried every 500 ms. The default is 20. -h, --help Display a help message with basic usage instructions -v, --version Display the fipvlan version string VLAN NAMING CONVENTIONS
The default VLAN device name is dev.vlan; where dev is the name of the Ethernet parent device and vlan is the discovered VLAN ID number. An optional suffix can be appended to this with -f commandline option. EXAMPLES
Display all discoverable VLANs with FCoE services fipvlan --auto Discover FCoE VLANs on interface eth2, create VLAN devices and start the Open-FCoE initiator fipvlan --create --start eth2 In this example if FCoE services were available on VLAN 101 of network interface eth2, then a VLAN interface eth2.101-fcoe would be created and used as the parent device for the initiator. SEE ALSO
fcoeadm(8) fcoemon(8) SUPPORT
fipvlan is part of the fcoe-utils package, maintained through the Open-FCoE project. Resources for both developers and users can be found at the Open-FCoE website http://open-fcoe.org/ Open-FCoE 10/06/2011 FIPVLAN(8)
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