X460 and X450 Flapping Ports

[Martin_Harrow]

I have installed 15 new X460 switch stacks, and upgraded the Firmware on some old X450s.
I notice that many of the Ethernet Ports are "Flapping". There is no stable connection, and devices constantly disconnect/reconnect at 10M/100M/1000M. I note that the problem is worse with some Canon Printers, but other devices have problems. I can make the ports more stable by forcing the speed to 10M.

Here are some typical syslogs:

May 6 10:21:31 degp-s02 Port 5:2 link down
May 6 10:21:34 degp-s02 Port 5:2 link UP at speed 1 Gbps and full-duplex
May 6 10:22:25 degp-s02 Port 5:2 link down
May 6 10:22:27 degp-s02 Port 5:2 link UP at speed 10 Mbps and half-duplex
May 6 10:22:43 degp-s02 Port 4:24 link down
May 6 10:22:45 degp-s02 Port 4:24 link UP at speed 10 Mbps and half-duplex
May 6 10:22:47 degp-s02 Port 1:10 link down
May 6 10:22:50 degp-s02 Port 1:10 link UP at speed 1 Gbps and full-duplex
May 6 10:22:50 degp-s02 Port 5:2 link down
May 6 10:22:53 degp-s02 Port 5:2 link UP at speed 1 Gbps and full-duplex
May 6 10:23:14 degp-s02 Port 1:10 link down
May 6 10:23:16 degp-s02 Port 1:10 link UP at speed 1 Gbps and full-duplex
May 6 10:25:24 degp-s02 Port 5:2 link down
May 6 10:25:27 degp-s02 Port 5:2 link UP at speed 10 Mbps and half-duplex
May 6 10:25:39 degp-s02 Port 3:42 link down
May 6 10:25:41 degp-s02 Port 3:42 link UP at speed 10 Mbps and half-duplex
May 6 10:25:43 degp-s02 Port 3:42 link down
May 6 10:25:45 degp-s02 Port 3:42 link UP at speed 10 Mbps and half-duplex
May 6 10:26:29 degp-s02 Port 4:24 link down
May 6 10:26:32 degp-s02 Port 4:24 link UP at speed 10 Mbps and half-duplex
May 6 10:27:44 degp-s02 Port 3:38 link down
May 6 10:27:47 degp-s02 Port 3:38 link UP at speed 10 Mbps and half-duplex
May 6 10:27:51 degp-s02 Port 5:2 link down
May 6 10:27:53 degp-s02 Port 5:2 link UP at speed 1 Gbps and full-duplex
May 6 10:28:06 degp-s09 Port 1:16 link down
May 6 10:28:08 degp-s09 Port 1:16 link UP at speed 10 Mbps and half-duplex
May 6 10:30:05 degp-s03 Port 1:1 link down
May 6 10:30:06 degp-s09 Port 1:16 link down
May 6 10:30:08 degp-s03 Port 1:1 link UP at speed 10 Mbps and full-duplex
May 6 10:30:09 degp-s09 Port 1:16 link UP at speed 1 Gbps and full-duplex
May 6 10:30:20 degp-s03 Port 1:1 link down
May 6 10:30:23 degp-s03 Port 1:1 link UP at speed 10 Mbps and full-duplex
May 6 10:30:57 degp-s03 Port 1:19 link down
May 6 10:30:59 degp-s03 Port 1:19 link UP at speed 10 Mbps and full-duplex
May 6 10:31:12 degp-s03 Port 1:19 link down
May 6 10:31:14 degp-s03 Port 1:19 link UP at speed 10 Mbps and full-duplex

How can I fix this? I have new(ish) f/w (X460 = v1541b3-patch1-1 and X450 = v1265b2-patch1-3)

Most of the cabling is brand new, could this be a problem?

Thanks,
Martin

[PARTHIBAN_CHINN]

we just need to upgrade x460 to the right EXOS version.
I believe in x460 by default the debounce timer is 150.
For other chassis based and summit switches it has to be manually set with exos versions.

[Stephane_Grosj1]

You need 15.5.3 I think for this command. Upgrade to the latest patch of this release.

[Gerardo_Lopez_Q]

I have a 2 slot stack with 460 runing xos 15.4.2 , I tried to configure the command "configure stack-ports 2:2 debounce time 150" but it is not accepted by the sw

How can i configure the debounce timer?

[Stephane_Grosj1]

The latest release of EXOS (15.5.3) should have a fix that remove the debounce timer. Please check the RN.

[PARTHIBAN_CHINN]

If the switch is connected to another 10 g port
(Switch) then yes. '
All 10g switch to switch connectivity ports must have debounce timer to 150 .

Note: 3rd party vendors have default debounce
Timer as 150