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Operating Systems AIX Changing VLAN on AIX lpars in the same subnet Post 302975484 by kaelu26 on Tuesday 14th of June 2016 03:49:23 AM
Old 06-14-2016
Changing VLAN on AIX lpars in the same subnet

Hi Guys,

Our lpars is currently running on 2 different vlans (20, 30). Now we have a requirement that vlan 30 needs to be change to vlan 31 at the same subnet. I'm not sure on what is the best approach for this or what change is involve on the AIX side.

This is our setup.

Network switch - trunked (allowed vlan 20, 30)
note: vlan 20 is the previous default vlan before it was changed to "trunked" and added vlan 30.

VIO1 and VIO2 - SEA (ent4) with ent2 (PVID 1) and ent3 (PVID 88, VLAN ID 30) attached to it.

lpar 1 - ent0 (PVID 1)
lpar 2 - ent0 (PVID 30)

Scenario:

Network team needs to change vlan 30 to vlan 31.

Change to be made on AIX lpars:

1. on VIOS, Add a new virtual adapter on SEA with PVID 89, VLAN ID 31
2. on lpar 2, this is where I'm confused if I need to change anything or not. Do I need to change PVID 30 to 31? Or I can just DLPAR the current ent0 and add VLAN 31 there?

I'm also confused on how PVID works on AIX clients.

Any inputs will be very much appreciated.

Regards,
K
 

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VCONFIG(8)						      System Manager's Manual							VCONFIG(8)

NAME
vconfig - VLAN (802.1q) configuration program. SYNOPSIS
vconfig [lots of long options] DESCRIPTION
The vconfig program allows you to create and remove vlan-devices on a vlan enabled kernel. Vlan-devices are virtual ethernet devices which represents the virtual lans on the physical lan. OPTIONS
add [interface-name] [vlan-id] Creates a vlan-device on [interface-name]. The resulting vlan-device will be called according to the nameing convention set. rem [vlan-device] Removes the named vlan-device. set_flag [vlan-device] 0 | 1 When 1, ethernet header reorders are turned on. Dumping the device will appear as a common ethernet device without vlans. When 0(default) however, ethernet headers are not reordered, which results in vlan tagged packets when dumping the device. Usually the default gives no problems, but some packet filtering programs might have problems with it. set_egress_map [vlan-device] [skb-priority] [vlan-qos] This flags that outbound packets with a particular skb-priority should be tagged with the particular vlan priority vlan-qos. The default vlan priority is 0. set_ingress_map [vlan-device] [skb-priority] [vlan-qos] This flags that inbound packets with the particular vlan priority vlan-qos should be queued with a particular skb-priority. The default skb-priority is 0. set_name_type VLAN_PLUS_VID | VLAN_PLUS_VID_NO_PAD | DEV_PLUS_VID | DEV_PLUS_VID_NO_PAD Sets the way vlan-device names are created. Use vconfig without arguments to see the different formats. NOTES VLAN will use Broadcom's NICE interface when the network device supports it. This is necessary, since usually the hardware of these devices already removes the vlan tag from the ethernet packet. The set_flag option on vlan-devices created on such a physical net- work device will be ignored. Dumping the network-device will show only untagged(non-vlan) traffic, and dumping the vlan-devices will only show traffic intended for that vlan, without the tags. FILES
/proc/net/vlan/config /proc/net/vlan/[vlan-device] SEE ALSO
ip(8), ifconfig(8) AUTHORS
This manual page was written by Ard van Breemen <ard@kwaak.net> The vlan patch is written by Ben Greear <greearb@candelatech.com> VCONFIG(8)
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