Last night on one of our LPAR, a group of our z/Linux Guest has disconnection
issues. Checking the vswitch, during the issue, of one of the guest, shows no
ip.
q vswitch vsw4 user l226t
VSWITCH SYSTEM VSW4 Type: QDIO Connected: 34 Maxconn: INFINITE
PERSISTENT RESTRICTED ETHERNET Accounting: OFF
USERBASED LOCAL
VLAN Aware Default VLAN: 0001 Default Porttype: Access
Native VLAN: 0001 VLAN Counters: OFF
MAC address: 02-8C-06-00-00-04 MAC Protection: Unspecified
IPTimeout: 5 QueueStorage: 8
Isolation Status: OFF VEPA Status: OFF
Uplink Port:
State: Ready PriQueuing: OFF
PMTUD setting: EXTERNAL PMTUD value: 9000 Trace Pages: 8
RDEV: B0C0.P00 VDEV: 0612 Controller: DTCVSW1 ACTIVE
Adapter ID: 39060001FCD8.01B8
EQID: CORPVLAN
RDEV: B1F0.P01 VDEV: 065D Controller: DTCVSW2 BACKUP
Adapter ID: 39060001FCD8.0148
EQID: CORPVLAN
RDEV: B0E0.P00 VDEV: 0660 Controller: DTCVSW2 BACKUP
Adapter ID: 39060001FCD8.0144
EQID: CORPVLAN
Adapter Connections: Connected: 34
Adapter Owner: L226T NIC: 0360.P00 Name: UNASSIGNED Type: QDIO
PQUplinkTX: Normal
Porttype: Access
RX Packets: 36182872 Discarded: 1536 Errors: 0
TX Packets: 35351099 Discarded: 0 Errors: 0
RX Bytes: 9583594034 TX Bytes: 27324079353
Device: 0362 Unit: 002 Role: DATA Port: 2193
Ready; T=0.01/0.01 09:36:53
On the guest using uncouple and couple doesn't work. Adding detach and define
after uncouple, reset the card.
CP UNCOUPLE 0360
NIC 0360 is disconnected from VSWITCH SYSTEM VSW4
CP DETACH NIC 0360
NIC 0360 is destroyed; devices 0360-0362 detached
2021-09-29T09:37:33.777491-04:00 l226t wickedd-nanny[3918]: device eth0: device
has been deleted
CP DEFINE NIC 0360 QDIO
NIC 0360 is created; devices 0360-0362 defined
2021-09-29T09:37:39.326132-04:00 l226t wickedd[3906]: ni_process_reap: process 3
4429 has not exited yet; now doing a blocking waitpid()
CP COUPLE 0360 TO SYSTEM VSW4
HCPCPL2788E NIC 0360 not connected; already connected to VSWITCH SYSTEM VSW4
q vswitch vsw4 user l226t
VSWITCH SYSTEM VSW4 Type: QDIO Connected: 34 Maxconn: INFINITE
PERSISTENT RESTRICTED ETHERNET Accounting: OFF
USERBASED LOCAL
VLAN Aware Default VLAN: 0001 Default Porttype: Access
Native VLAN: 0001 VLAN Counters: OFF
MAC address: 02-8C-06-00-00-04 MAC Protection: Unspecified
IPTimeout: 5 QueueStorage: 8
Isolation Status: OFF VEPA Status: OFF
Uplink Port:
State: Ready PriQueuing: OFF
PMTUD setting: EXTERNAL PMTUD value: 9000 Trace Pages: 8
RDEV: B0C0.P00 VDEV: 0612 Controller: DTCVSW1 ACTIVE
Adapter ID: 39060001FCD8.01B8
EQID: CORPVLAN
RDEV: B1F0.P01 VDEV: 065D Controller: DTCVSW2 BACKUP
Adapter ID: 39060001FCD8.0148
EQID: CORPVLAN
RDEV: B0E0.P00 VDEV: 0660 Controller: DTCVSW2 BACKUP
Adapter ID: 39060001FCD8.0144
EQID: CORPVLAN
Adapter Connections: Connected: 34
Adapter Owner: L226T NIC: 0360.P00 Name: HYD1G1 Type: QDIO
PQUplinkTX: Normal
Porttype: Access
RX Packets: 677 Discarded: 0 Errors: 0
TX Packets: 1141 Discarded: 0 Errors: 0
RX Bytes: 202309 TX Bytes: 971765
Device: 0362 Unit: 002 Role: DATA Port: 2193
VLAN: 0311
Options: Ethernet Broadcast
Unicast MAC Addresses:
02-78-C1-02-26-00 IP: 10.23.11.205
Multicast MAC Addresses:
01-00-5E-00-00-01
33-33-00-00-00-01
33-33-FF-02-26-00
Ready; T=0.01/0.01 09:38:15
My questions are:
1. Why those servers can't recover when the others can?
2. Is there a way to check what cause this?
3. Do anyone has this issue before?
The preliminary search shows that the issue arises between 10:09 PM. We have
SLES12 SP5 under z/VM 7.2.
Regards,
Victor Echavarry
System Programmer
Operating Systems
EVERTEC, LLC
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