Wired Intelligent Edge

Hello,

i have random problem with switchs 2530-48 series.

FW:YA.16.08.0002

ROM:YA.15.20

Port is enabled and up but network not work. Packets transmitted only (DHCP request or broadcats when i set static IP on connected device). After reboot switch this port work fine some time. Device what connected to this port is work great on neighbor port what configured the same.  What can i do with this problem?

Can you share sanitized running configuration of the switch?

What is the output of show interface command applied on interface showing the issue?

What is the output of show interface command applied on interface showing the issue?

Status and Counters - Port Counters for port 3

Name : 208
MAC Address : 94XXXX-XXXXXX
Link Status : Up
Port Enabled : Yes
Totals (Since boot or last clear) :
Bytes Rx : 4,039,047,777 Bytes Tx : 1,949,123,342
Unicast Rx : 5,685,540 Unicast Tx : 6,521,590
Bcast/Mcast Rx : 15,550 Bcast/Mcast Tx : 739,338
Errors (Since boot or last clear) :
FCS Rx : 0 Drops Tx : 1
Alignment Rx : 0 Collisions Tx : 0
Runts Rx : 0 Late Colln Tx : 0
Giants Rx : 0 Excessive Colln : 0
Total Rx Errors : 0 Deferred Tx : 0
Others (Since boot or last clear) :
Discard Rx : 0 Out Queue Len : 0
Unknown Protos : 0
Rates (5 minute weighted average) :
Total Rx (bps) : 0 Total Tx (bps) : 2,056
Unicast Rx (Pkts/sec) : 0 Unicast Tx (Pkts/sec) : 0
B/Mcast Rx (Pkts/sec) : 0 B/Mcast Tx (Pkts/sec) : 0
Utilization Rx : 0 % Utilization Tx : 0 %

 

Without seeing the running configuration (the entire one better than just the interface contexts part only) it's difficult to understand what is going on...try to clear ethernet statistcs for interface under diagnosis (interface 3, isn't it?) and before starting a new test try to disable-then-enable it with peer connected while collecting related logs (e.g. by examining show logs -r command output).

Zero drops, errors and collisions make me argue the interface is apparently healthy.

You right it interface 3.

Status and Counters - Port Counters for port 3

Name : 208
MAC Address : 94XXXX-XXXXXX
Link Status : Up
Port Enabled : Yes
Totals (Since boot or last clear) :
Bytes Rx : 0 Bytes Tx : 3,761
Unicast Rx : 0 Unicast Tx : 0
Bcast/Mcast Rx : 0 Bcast/Mcast Tx : 45
Errors (Since boot or last clear) :
FCS Rx : 0 Drops Tx : 0
Alignment Rx : 0 Collisions Tx : 0
Runts Rx : 0 Late Colln Tx : 0
Giants Rx : 0 Excessive Colln : 0
Total Rx Errors : 0 Deferred Tx : 0
Others (Since boot or last clear) :
Discard Rx : 0 Out Queue Len : 0
Unknown Protos : 0
Rates (5 minute weighted average) :
Total Rx (bps) : 0 Total Tx (bps) : 112
Unicast Rx (Pkts/sec) : 0 Unicast Tx (Pkts/sec) : 0
B/Mcast Rx (Pkts/sec) : 0 B/Mcast Tx (Pkts/sec) : 0
Utilization Rx : 0 % Utilization Tx : 0 %

I 04/26/19 xx:51:20 00076 ports: port 3 is now on-line
I 04/26/19 xx:51:17 00435 ports: port 3 is Blocked by STP
I 04/26/19 xx:51:13 00992 auth: Permit Command: user "XX" command "interface 3 enable".
I 04/26/19 xx:51:02 00992 auth: Permit Command: user "XX" command "clear statistics 3".
I 04/26/19 xx:50:56 00077 ports: port 3 is now off-line
I 04/26/19 xx:50:56 00992 auth: Permit Command: user "XX" command "interface 3 disable".

What exactly do you want to see in the configuration? Its just acces port and it worked properly long time. No configuration changes were made. All interesting what i can find in log this - "system:The security log buffer is almost full", "ntp:All the NTP server associations reset", "ntp:The system clock time was changed by...."

 

The log is full of what?

Try to understand if so numerous logged messages are related to interface 3...with:

show logs -r | include Port 3

Have you tried to diagnose with fault finder feature on that port?

Strange it isn't receiving any packet (Rx)...

show logs -r | include Port 3

show only port up\down and STP messages.

In this morning i was get second port with this problem - 3 and 4.

but i have workaround for it without reboot switch- i turned off port for 3-5 minutes and turned it on again. Now both ports work.

Thans for all, if i get this problem again i will write a support request.

If you have interfaces flappings (STP blocking) often better that you start diagnosing them carefully IMHO...just rebooting a Switch is not a permanent solution...and, maybe,- as a workaround - it will give you the false impression all is solved without understanding that things can go crazy again.