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Flow Control and Pause Frames?
Hi, I'l Make my own, post, sorry about that!
I'm getting many messages like this on all my vHosts:
Device naa.6090a05840a81742cc2985a411124123412 performance has
deteriorated. I/O latency increased from average value of 3451
microseconds to 69409 microseconds.
warning
1/13/2015 11:16:26 AM
Device naa.6090a05840a81742cc2985a411124123412 performance has
improved. I/O latency reduced from 69409 microseconds to 13608
microseconds.
info
1/13/2015 11:16:31 AM
On My Force10 S50n:
interface GigabitEthernet 0/23
description EQL iSCSI Port
no ip address
mtu 9216
switchport
flowcontrol rx on tx on
spanning-tree rstp edge-port
no shutdown
On the Equallogic Sumo
(member_Sumo2-96 eth_1)> lldp show
____________________________ Eth LLDP Information _____________________________
Name: eth1 LLDP-State: active
System-Name: force10S50n HardwareAddress: 00:01:**:**:16:**
System-Description: Dell Force10 Real Chassis-Id: 00:01:**:D6:16:**
Time Operating System Software. Dell Port-Id: GigabitEthernet 0/23
Force10 Operating System Version: Port-Description: EQL iSCSI Port
1.0. Dell Force10 Application
Software Version: 8.4.2.7. Copyright
(c) 1999-2012 Dell Inc. All Rights
Reserved.Build Time: Thu Sep 27
14:03:07 PDT 2012
force10S50nr#sho int gigabitethernet 0/23
GigabitEthernet 0/23 is up, line protocol is up
Description: EQL iSCSI Port
Hardware is DellForce10Eth, address is 00:01
Current address is 00:01
Pluggable media not present
Interface index is 39896066
Internet address is not set
MTU 9216 bytes, IP MTU 9198 bytes
LineSpeed 1000 Mbit, Mode full duplex
Flowcontrol rx on tx on
ARP type: ARPA, ARP Timeout 04:00:00
Last clearing of "show interface" counters 83w1d4h
Queueing strategy: fifo
Input Statistics:
1266195111 packets, 3140557967695 bytes
60842067 64-byte pkts, 763192179 over 64-byte pkts, 29652329 over 127-byte pkts
259127 over 255-byte pkts, 821599 over 511-byte pkts, 411427810 over 1023-byte pkts
97553 Multicasts, 3954 Broadcasts
0 runts, 0 giants, 0 throttles
0 CRC, 0 overrun, 0 discarded
Output Statistics:
1419580701 packets, 4639551858302 bytes, 0 underruns
62626526 64-byte pkts, 753130053 over 64-byte pkts, 18874989 over 127-byte pkts
1260685 over 255-byte pkts, 4072483 over 511-byte pkts, 579615965 over 1023-byte pkts
1674465 Multicasts, 289064 Broadcasts, 841537672 Unicasts
161418 throttles, 0 discarded, 0 collisions
Rate info (interval 299 seconds):
Input 11.00 Mbits/sec, 1241 packets/sec, 1.10% of line-rate
Output 60.00 Mbits/sec, 1340 packets/sec, 6.10% of line-rate
Time since last interface status change: 4w6d22h
Anonymous
5 Practitioner
5 Practitioner
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274.2K Posts
1
January 13th, 2015 10:00
Hello,
These messages are not likely related to the network. Anytime the latency goes up 20x, these alerts are generated. Common misconfigurations on the ESXi side tend to increase the frequency of these alerts.
If you review the PDF on best practices these alerts will likely abate. However, occasional alerts, especially when the max number is NOT in the millions of microseconds, can be ignored..
A copy is available here:
en.community.dell.com/.../20434601.aspx
Regards,