When deleting SEAs with load sharing, the order in which the two SEAs are deleted does not matter. As a rule, SEAs are only deleted, if they are currently no longer in use. After the first of the two SEAs has been deleted, the remaining SEA automatically becomes the primary SEA and therefore becomes the active SEA for all supported VLANs. That means there is a failover for some of the VLANs.

To demonstrate the commands, we start by deleting the backup SEA ent44 on the virtual I/O server ms05-vio2, using the command „vios rmsea“:

$ vios rmsea ms05-vio2 ent44
$

The remaining SEA ent46 on the virtual I/O server ms05-vio1 becomes the primary without load sharing and takes over the forwarding of all VLANs:

$ vios lssea -V ms05-vio1 ent46
SEA    LNAGG  NAME   TYPE     VSWITCH   MODE  ACTIVE  PRIORITY  PVID  VLAN_TAG_IDS
ent46  -      ent3   real     -         -     -       -         -     -
ent46  -      ent44  virtual  ETHTEST3  VEB   True    1         4     20,21,22
ent46  -      ent43  virtual  ETHTEST3  VEB   True    1         3     17,18,19
ent46  -      ent42  virtual  ETHTEST3  VEB   True    1         2     14,15,16
ent46  -      ent41  virtual  ETHTEST3  VEB   True    1         1     11,12,13
ent46  -      ent39  control  ETHCTRL   -     -       -         1     None
$

You can see from the output that all trunking adapters of the SEA ent46 are active (column ACTIVE – value True). We also delete this SEA with the help of the “vios rmsea” command:

$ vios rmsea ms05-vio1 ent46
$

Since the trunking adapters used are no longer required, we first list them, to see the associated virtual slot numbers:

$ vios lssea -c ms05-vio1
NAME   STATUS     PHYSLOC                      PARENT  DESCRIPTION
ent3   Available  U78AA.001.VYRGU0Q-P1-C7-T4   pci1    4-Port Gigabit Ethernet PCI-Express Adapter (e414571614102004)
ent2   Available  U78AA.001.VYRGU0Q-P1-C7-T3   pci1    4-Port Gigabit Ethernet PCI-Express Adapter (e414571614102004)
ent39  Available  U8205.E6C.05E4E5Q-V1-C70-T1  vio0    Virtual I/O Ethernet Adapter (l-lan)
ent41  Available  U8205.E6C.05E4E5Q-V1-C71-T1  vio0    Virtual I/O Ethernet Adapter (l-lan)
ent42  Available  U8205.E6C.05E4E5Q-V1-C72-T1  vio0    Virtual I/O Ethernet Adapter (l-lan)
ent43  Available  U8205.E6C.05E4E5Q-V1-C73-T1  vio0    Virtual I/O Ethernet Adapter (l-lan)
ent44  Available  U8205.E6C.05E4E5Q-V1-C74-T1  vio0    Virtual I/O Ethernet Adapter (l-lan)
ent45  Available  U8205.E6C.05E4E5Q-V1-C75-T1  vio0    Virtual I/O Ethernet Adapter (l-lan)
$

Knowing the slot numbers, we delete the former control channel (slot 70) and the trunking adapter (slot 71-75), using the command „lpar rmeth“:

$ lpar rmeth ms05-vio1 70
$ lpar rmeth ms05-vio1 71
$ lpar rmeth ms05-vio1 72
$ lpar rmeth ms05-vio1 73
$ lpar rmeth ms05-vio1 74
$ lpar rmeth ms05-vio1 75
$

The same is done on the second virtual I/O server ms05-vio2. We first list the adapters:

$ vios lssea -c ms05-vio2
NAME   STATUS     PHYSLOC                      PARENT  DESCRIPTION
ent3   Available  U78AA.001.VYRGU0Q-P1-C6-T2   pci3    4-Port Gigabit Ethernet PCI-Express Adapter (e414571614102004)
ent4   Available  U78AA.001.VYRGU0Q-P1-C6-T3   pci3    4-Port Gigabit Ethernet PCI-Express Adapter (e414571614102004)
ent5   Available  U78AA.001.VYRGU0Q-P1-C6-T4   pci3    4-Port Gigabit Ethernet PCI-Express Adapter (e414571614102004)
ent38  Available  U8205.E6C.05E4E5Q-V2-C70-T1  vio0    Virtual I/O Ethernet Adapter (l-lan)
ent39  Available  U8205.E6C.05E4E5Q-V2-C71-T1  vio0    Virtual I/O Ethernet Adapter (l-lan)
ent40  Available  U8205.E6C.05E4E5Q-V2-C72-T1  vio0    Virtual I/O Ethernet Adapter (l-lan)
ent41  Available  U8205.E6C.05E4E5Q-V2-C73-T1  vio0    Virtual I/O Ethernet Adapter (l-lan)
ent42  Available  U8205.E6C.05E4E5Q-V2-C74-T1  vio0    Virtual I/O Ethernet Adapter (l-lan)
ent43  Available  U8205.E6C.05E4E5Q-V2-C75-T1  vio0    Virtual I/O Ethernet Adapter (l-lan)
$

Then, in order to delete the former control channel (slot 70) and the trunking adapter (slot 71-75) here as well, we use the command „lpar rmeth“ again:

$ lpar rmeth ms05-vio2 70
$ lpar rmeth ms05-vio2 71
$ lpar rmeth ms05-vio2 72
$ lpar rmeth ms05-vio2 73
$ lpar rmeth ms05-vio2 74
$ lpar rmeth ms05-vio2 75
$