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link down - Local Fault

link down - Local Fault

Jason_Weems
New Contributor II
I have been seeing an issue in my virtual environment of randomly losing connectivity to iSCSI LUNs. My hosts are showing a loss of connectivity, I looked at the logs on my X670V-48t and i found what looked to be the same time frame of the port going down stating :
05/22/2016 19:23:28.19 Slot-1: Port 1:21 link down - Local fault
05/22/2016 19:23:57.64 Slot-1: Port 1:21 link UP at speed 10 Gbps and full-duplex
05/22/2016 19:23:58.99 Slot-1: Configuration mismatch detected by DCBX (Baseline v1.01) for the PFC TLV on port 1:21.
05/22/2016 19:23:59.99 Slot-1: Configuration mismatch resolved by DCBX (Baseline v1.01) for the PFC TLV on port 1:21.

I need a little insight on what is possibly going on here.
8 REPLIES 8

Ty_Kolff
New Contributor II
Just an FYI for anyone else who see this. I just had this issue with a 10gb connection between a x620 and an x460. I swapped out the SFP+ cable and the problem went away.

Jason_Weems
New Contributor II
The ports affected are the same set of ports each time.
None of the ports are part of an aggregation.
It happened to each of the ports 3 times in a 2hr period.
XOS version is 15.3.3.5

This was happening to 9 different ports which were attached to 3 different hosts, 3 ports per Host.
Host A - 1:3 mgmt, 2:26 iSCSI, 2:18 VM data (mulitple vlans)
Host B - 1:38 mgmt, 1:21 iSCSI, 2:8 VM data (multiple vlans)
Host C - 2:21 mgmt, 2:14 iSCSI, 1:12 VM data (multiple vlans)

2 of the host, Host A and Host B were affected enough that they needed to be rebooted. Host C for some reason did not show any signs of distress.

Here is the full log from the time frame:

The ports affected are the same set of ports each time.
None of the ports are part of an aggregation.
It happened to each of the ports 3 times in a 2hr period.
XOS version is 15.3.3.5

This was happening to 9 different ports which were attached to 3 different hosts, 3 ports per Host.
Host A - 1:3 mgmt, 2:26 iSCSI, 2:18 VM data (mulitple vlans)
Host B - 1:38 mgmt, 1:21 iSCSI, 2:8 VM data (multiple vlans)
Host C - 2:21 mgmt, 2:14 iSCSI, 1:12 VM data (multiple vlans)

2 of the host, Host A and Host B were affected enough that they needed to be rebooted. Host C for some reason did not show any signs of distress.

Here is the full log from the time frame:

Drew_C
Valued Contributor III
Configure the SNMPv3 commands below in an EXOS switch and add this switch using 'snmp_v3_profile' in NetSight.

# configure snmpv3 add user snmpuser authentication md5 snmpauthcred privacy des snmpprivcred
# configure snmpv3 add group snmpgroup user snmpuser sec-model usm
# configure snmpv3 add access snmpgroup sec-level priv read-view defaultAdminView write-view defaultAdminView notify-view defaultNotifyView
GTM-P2G8KFN