Re: info carrier-delay down Nexus 3064

santox · ‎07-12-2021

Hi, I have a Nexus 3064 where is connect a L2 protected.

When I have a fiber cut, provider switch automatically to backup line withouth problem. When master is going up, they cant switch to the master because flap of Nexus port is <50ms.

They tell me to

"be able to advise how to increase “carrier-delay down” time on your ports in order to not send LOS during protection switch (sub 50ms flaps)."

I try to find something on the internet but I cant.

Someone can help me to try a way to fix this?

have a nice day

marce1000 · ‎07-13-2021

- FYI : https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus3000/sw/command/reference/931m3k/config/b_N3K_Config_Commands_93x_n3k/b_N3K_Config_Commands_93x_n3k_chapter_0101.html#wp1612371669

M.

-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

santox · ‎07-13-2021

Hi marce

I try this command and set to 300msec to my used vlan and doesnt work.

ports send LOS in case of sub 50ms service flaps

marce1000 · ‎07-13-2021

- Check current software version being used on the 3064 , use an advisory release if applicable , check if that can help.

M.

-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

santox · ‎07-13-2021

version 6.0(2)

i dont find anything for los in phisical interface. Maybe is not a feature of this switch...

Giuseppe Larosa · ‎07-13-2021

Hello @santox ,

you should apply the command to the physical interface not on an SVI or at VLAN level.

Hope to help

Giuseppe

santox · ‎07-13-2021

Hi Giuseppe

there is no command in the physical interface.

i check online seem to be this only in modular series with higher price

santox · ‎11-04-2021

Hi,

i find this command that seems to be good for my problem.

I try to use but doesnt work.

i cant believe that I replace my Mikrotik switches with Nexus and now I have this problem with my L2 links.

any ideas?

have a nice day

Debounce time: The port debounce time is the amount of time that an interface waits to notify the supervisor of a link going down. During this time, the interface waits to see if the link comes back up. The wait period is a time when traffic is stopped.

bopage · ‎07-13-2023

This command is only for SVI with Nexus - Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide - Configuring Basic Interface Parameters [Cisco Nexus 7000 Series Switches] - Cisco

assistenzaelia · ‎07-13-2023

Hi, so how can I solve the problem? This switch series cant manage this type of flap?

thank you