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m1000e no traffic between A2 and blades with esxi

Enivornment: m1000e with m6220 switches in the A1/A2. Blades are M630

our ESXI hosts are teamed between A1 and A2. A1 and A2 are not stacked. The interfaces for vmnic0(a1) and vmnic1(a2) on the m6220 are configured the same.

Right now, all the blades function when only assigned to vmnic0(a1), however traffic stops when we add in vmnic1(a2) as a redundant link. if we just use vmnic1 and remove vmnic0, they also do not send traffic.

Running show interface counters gi1/0/9, i'm seeing minimal traffic, with all traffic being discarded on transmit.

 

Port InTotalPkts InUcastPkts InMcastPkts InBcastPkts
--------- ---------------- ---------------- ---------------- ----------------
Gi1/0/9 2685 434 58 2193

Port OutTotalPkts OutUcastPkts OutMcastPkts OutBcastPkts
--------- ---------------- ---------------- ---------------- ----------------
Gi1/0/9 158902 2380 48510 108012

FCS Errors: ................................... 0
Single Collision Frames: ...................... 0
Late Collisions: .............................. 0
Excessive Collisions: ......................... 0
Multiple Collisions: .......................... 0
Received Oversize Packets: .................... 0
Transmitted Oversize Packets: ................. 0
Internal MAC Rx Errors: ....................... 0
Received Pause Frames: ........................ 0
Transmitted Pause Frames: ..................... 0
Receive Packets Discarded: .................... 0
Transmit Packets Discarded: ................... 559886

I'm having trouble identifying if there is a configuration issue on the ESXI host, or the m1000e, or if there is a hardware failure.

Everything was working fine until some weeks ago. The server admin noted that no changes were made on his end in ESXI or in the dell CMC, and no configuration changes were made on the switches.

The A2 switch shows as connected, and no errors in the Dell CMC for it. CDP is successful over the link between the A2 and the blades.

I'm trying to find out why the transmits are all being discarded. Any help is appreciated

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Solution (1)

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974

I don't mean to Triple Post, but I've found what appears to be the cause. Root still to be determined by the server Admin.

 

With noticing traffic failing on the link between my c9500 and the m6220, I looked into the counters and saw  the TX pause frames:

BldChs1A2#show interfaces counters te1/1/1

Port InTotalPkts InUcastPkts InMcastPkts InBcastPkts
--------- ---------------- ---------------- ---------------- ----------------
Te1/1/1 1128521 18698 375403 734420

Port OutTotalPkts OutUcastPkts OutMcastPkts OutBcastPkts
--------- ---------------- ---------------- ---------------- ----------------
Te1/1/1 9363 1208 7828 327

FCS Errors: ................................... 0
Single Collision Frames: ...................... 0
Late Collisions: .............................. 0
Excessive Collisions: ......................... 0
Multiple Collisions: .......................... 0
Received Oversize Packets: .................... 0
Transmitted Oversize Packets: ................. 0
Internal MAC Rx Errors: ....................... 0
Received Pause Frames: ........................ 0
Transmitted Pause Frames: ..................... 13641269
Receive Packets Discarded: .................... 32
Transmit Packets Discarded: ................... 0

 

 

I then checked all my interface counters on the m6220, to see if there was excessive traffic coming from any of it's active interfaces (Only blade 9 was supposed to have any vnic's attached to a2).

BldChs1A2#show interfaces counters

Port InTotalPkts InUcastPkts InMcastPkts InBcastPkts
--------- ---------------- ---------------- ---------------- ----------------
Gi1/0/1 0 0 0 0
Gi1/0/2 0 0 0 0
Gi1/0/3 108 0 108 0
Gi1/0/4 3775806 0 3775806 0
Gi1/0/5 0 0 0 0
Gi1/0/6 0 0 0 0
Gi1/0/7 0 0 0 0
Gi1/0/8 0 0 0 0
Gi1/0/9 637 224 113 300
Gi1/0/10 0 0 0 0
Gi1/0/11 86 0 20 66
Gi1/0/12 0 0 0 0
Gi1/0/13 0 0 0 0
Gi1/0/14 0 0 0 0
Gi1/0/15 0 0 0 0
Gi1/0/16 0 0 0 0
Gi1/0/17 0 0 0 0
Gi1/0/18 0 0 0 0
Gi1/0/19 0 0 0 0
Gi1/0/20 0 0 0 0

Te1/1/1 1134693 18753 377354 738586
Te1/1/2 0 0 0 0

 

Gi1/0/9 was supposed to have traffic, as well as TE 1/1/1. Gi1/0/11 as low, and negligible, but Gi1/0/4 stuck out.

 

I shut down interface gi1/0/4, and immediately  the pause frames stopped. I was then able to reach the m6220 from my c9500, as well as reach all my test VMs.

 

We're currently checking out what on blade 4 would be causing this kind of traffic that caused the pause frames. It's al older 610 half height blade, but vcenter doesn't show any NIC's that would appear on the A2 switch (vmnic1). We might just decommission this blade, but I'd like to find the actual cause first.

For now, it appears the issue is resolved.

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Replies (24)
810

Hi,

What does "show spanning-tree” show for that port? Page 756 https://dell.to/3fwPLl9


Thanks,

DELL-Josh Cr
Social Media and Communities Professional
Dell Technologies | Enterprise Support Services
#IWork4Dell

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744

Hi Josh,

 

Here is the Spanning Tree output:

 


BldChs1A2#show spanning-tree gi1/0/9

Port Gi1/0/9 Enabled
State: Forwarding Role: Designated
Port id: 128.9 Port Cost: 20000
Port Fast: Yes Root Protection: No
Designated bridge Priority: 32768 Address: 0025.6413.AB6E
Designated port id: 128.9 Designated path cost: 0
CST Regional Root: 80:00:00:25:64:13:AB:6E
Root Guard..................................... FALSE
Loop Guard..................................... FALSE
TCN Guard...................................... FALSE
Auto Portfast.................................. TRUE
Port Up Time Since Counters Last Cleared....... 0 day 1 hr 42 min 38 sec
BPDU: sent 43268, received 0

 

741

Hi,

 

Spanning tree seems to be activated, could you send the command show spanning-tree detail for deeper analysis? Could you also check/deactivate all firewall rules on the VM?

 

Regards,


Stéphane Thiallier
Business Intelligence Advisor

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English Enterprise Community or French Enterprise Community
740

Here's the output of the detail for the port:

Spanning tree Enabled (BPDU flooding : Disabled) Portfast BPDU filtering Disabled mode rstp
CST Regional Root: 80:00:00:25:64:13:AB:6E
Regional Root Path Cost: 0
ROOT ID
Address 80:00:00:25:64:13:AB:6E
This Switch is the Root.
Hello Time 2 Sec Max Age 20 sec Forward Delay 15 sec TxHoldCount 6 sec
Bridge Max Hops 20

Number of topology changes 0 last change occurred 13d21h49m42s ago
Times: hold 6, hello 2, max age 20, forward delay 15


Port Gi1/0/9 Enabled
State: Forwarding Role: Designated
Port id: 128.9 Port Cost: 20000
Root Protection: No
Designated bridge Priority: 32768 Address: 0025.6413.AB6E
Designated port id: 128.9 Designated path cost: 0
CST Regional Root: 80:00:00:25:64:13:AB:6E CST Port Cost: 0
BPDU: sent 48271, received 0

 

I'll need to get a request in to disable the firewall on esxi instance, however here is the firewall rule list

My test VM in this blade has it's windows firewall disabled.

esxcli network firewall ruleset list
Name Enabled
---------------------- -------
sshServer true
sshClient false
nfsClient false
nfs41Client false
dhcp true
dns true
snmp true
ntpClient false
CIMHttpServer true
CIMHttpsServer true
CIMSLP true
iSCSI true
vpxHeartbeats true
updateManager true
faultTolerance true
webAccess true
vMotion true
vSphereClient true
activeDirectoryAll true
NFC true
HBR true
ftpClient false
httpClient false
gdbserver false
DVFilter false
DHCPv6 false
DVSSync true
syslog false
WOL true
vSPC false
remoteSerialPort false
rdt false
cmmds false
vsanvp false
rabbitmqproxy true
ipfam false
vvold false
iofiltervp true
esxupdate false
vit false
vsanEncryption false
pvrdma false
vsanhealth-unicasttest false

 

736

Spanning-tree looks fine. Can you reboot that switch?


Thanks,

DELL-Josh Cr
Social Media and Communities Professional
Dell Technologies | Enterprise Support Services
#IWork4Dell

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735

We've rebooted the switch multiple times, and also loaded the config onto a spare unit and swapped them out. No success with either option.

734

What firmware version are you on?


Thanks,

DELL-Josh Cr
Social Media and Communities Professional
Dell Technologies | Enterprise Support Services
#IWork4Dell

Did I answer your query? Please click on ‘Accept as Solution’. ‘Kudo’ the posts you like!

733

Our A2 m6220 is on 5.1.16.1

Our functioning A1 m6220 is on 5.1.8.2

732

Was it updated as a troubleshooting step or was it always a different version from the other switch?

 


Thanks,

DELL-Josh Cr
Social Media and Communities Professional
Dell Technologies | Enterprise Support Services
#IWork4Dell

Did I answer your query? Please click on ‘Accept as Solution’. ‘Kudo’ the posts you like!

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