Cat 9200 cdp one sided

[mrom2]

I am having an issue where we are retiring some 2960x switches with some 9200 series switches.  The 9200's are in a stack and connected back with fiber back to the core(9300 series).  When i do a( sh cdp nei) on the 9200 i can see the 9300 but when i do the same command on the 9300 i cannot see the 9200.from what i can tell everything is configured correctly but the new stack will not communicate with the core.  I don't know what i am missing here.

[Flavio Miranda]

Hi

 Did you try to enable CDP?

 conf t

cdp run

About the communication with Core, this can be a whole new conversation. Which test are you doing?

[mrom2]

I tried the enable CDP already.

[mrom2]

Ports on both sides show up/up

[MHM Cisco World]

there are two mode of CDP
you must enable CDP in global 
you must enable CDP in interface mode (physical and/or port-channel) 

[Leo Laohoo]

What is the firmware of both switches. 

There are bugs triggered when different sub-models, like a 9200 connected to a 9300, the SFP would just stop dropping CDP traffic.  

This only happens if the switches are interconnected by optics.  IF the same switches are connected by copper, they are fine.  

[mrom2]

C9300-24T   16.12.05b

C9200 48p    17.03.04

[Leo Laohoo]

---

@mrom2 wrote:
C9300-24T   16.12.05b

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A switch on 16.12.X train.  I can see where the problem is right now.  

[paul driver]

Hello
Update the Software on the 9ks

[mrom2]

updated as suggested to latest version 17.06.05 but now the 9200 stack will not come up.  i get this error: failed to boot from flash:package.conf(Not Found)

[Leo Laohoo]

IF the switch is in ROMMON, post the complete output to the command "dir flash:".

[mrom2]

I figured out what the issue was.  the 's' in packages was missing(flash:package.conf).  Once i got that figured out i went to the active master switch(in my case Switch #5) and booted to the correct flash and the stack came up as it should

[MHM Cisco World]

this solve the stack or stack and cdp issue ?

[mrom2]

Both it seems.  Once the stack came up i was able to see the switch from the 9300 core switch.

[MHM Cisco World]

Thanks a lot for update us. 

MHM