rahulkmbl
Contributor
Contributor

iscsi connection drops

Issue -> 

seeing frequent datastore volume disconnects and reconnects alerts to truenas iscsi using sw iscsi.

 

observation

from esxi seeing packet loss

 

[root@fsys-lc1-esxi-1-27:~] esxcli network diag ping -H 10.1.1.100
Trace:
Received Bytes: 64
Host: 10.1.1.100
ICMP Seq: 2
TTL: 64
Round-trip Time: 237 us
Dup: false
Detail:
Summary:
Host Addr: 10.1.1.100
Transmitted: 3
Received: 1
Duplicated: 0
Packet Lost: 66 >>>>>>>>>>>>>>>>>packet loss seen here.
Round-trip Min: 237 us
Round-trip Avg: 237 us
Round-trip Max: 237 us

 

 

on truenas seeing below warming

Apr 12 06:41:40 lc1-nas01 WARNING: 10.1.1.27 (iqn.1998-01.com.vmware:fsys-lc1-esxi-1-27-4f540b0d): connection error; dropping connection

 

esxi version - 6.7 U3 

truenas version - FreeNAS-11.2-U8

using software iscsi 

 

attaching esxtop details , alerts screenshot

 

Networking

esxi host>to>ip switch>>freenas using 10g network

MTU set on esxi/freenas - 1500 
on switch its set to 9000.

 

 

Can anyone help me to figure out what is happening and how to stop the alerts?

Below was tried already->

1. changed iscsi timeout = 0 on freenas

2. esxi upgrade

3. esxi reboot

4.disable/enable sw iscsi adapter

5.rescan

6.target delete and recreate on freenas

 

Thanks!

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3 Replies
scott28tt
VMware Employee
VMware Employee

Anything to do with you having installed updates for a security advisory, or not?

 


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Although I am a VMware employee I contribute to VMware Communities voluntarily (ie. not in any official capacity)
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rahulkmbl
Contributor
Contributor

@scott28tt 

 

the only update i did was applied release patch for esxi 6.7 u3 for this issue which did not help. Anything else that I can tune on freenas or esxi to get rid of these alerts?

 

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scott28tt
VMware Employee
VMware Employee

Thread reported, moderators should now move it to the correct area.

 


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Although I am a VMware employee I contribute to VMware Communities voluntarily (ie. not in any official capacity)
VMware Training & Certification blog
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