About cco_heerema

cco_heerema · 10-02-2017

During a setup of my new cores (2 x 3850 XS switches) running IOS XE 16.6.1 in VSS mode due to an unknown reason one of my switches keeps rebooting after switch election with the following message :Waiting for 120 seconds for other switches to boot##...

cco_heerema · 08-13-2015

Currently we are building our new network and after a successful test off site we are now experiencing the following behavior we are not able to explain.Situation :We have 2 Cisco Nexus 56128P (running 7.1(1)N1(1) ) switches as our core layer, via t...

cco_heerema · 10-24-2014

I am currently investigating an issue which I find rather difficult to "catch" and find information about.We are running a DMVPN environment based on 2951 HUB routers & 1941 Spoke routers all over the globe (20 locations).HUB routers are connected on...

cco_heerema · 12-02-2013

Currently running all my 3750X's on Ios 15.0.2 SE2, all switches are in a minimum of a 2 member stack and a maximum of 6 members.We are running in all sorts of issues lately.High CPU due to the Auth Manager.Not being able to use port security (will r...

cco_heerema · 10-22-2013

Hi All,I've got an issue which has also been discussed on March 2008, and than marked as an ignorable error (as in will be solved in new IOS release)Currently more than 5 years later I am also having this issue on one of my switches. Here are the fac...

cco_heerema · 10-05-2017

So for future reference if any ony finds this .. here is the sollution to get your switch out of the boot loop : in bootloader mode enter : Switch: set you will see outout like below (values may vary) switch: set ...

cco_heerema · 10-02-2017

The mode button does not work other than getting the bootloader prompt. (that's how I was able to do the recover procedures) I could try to downgrade it to a 3 version, is that what you are suggesting ? RMA is a final resort, so hoping for a "soft" s...

cco_heerema · 08-13-2015

Problem is solved, root cause was due to the fact that Jumbo frames where not implemented correctly on the Cisco Nexus 56128P core switches.After adding :policy-map type network-qos jumboclass type network-qos class-defaultmtu 9216system qosservice-...

cco_heerema · 08-13-2015

the last output is from another access switch than the first output I posted, and has a full 255 reliability. besides that it's a new building all fibers are brand new and tested ok just a few weeks ago.And how can one explain a layer one issue bein...

cco_heerema · 08-13-2015

I am sure it's not a layer one issue, as soon as I remove the uplink to my "old" network or even just block all VLANS on the uplink trunk to the old network everything is fine So we might have an issue on this switch on this uplink but we have like I...

Member Since	‎01-05-2007 09:11 AM
Date Last Visited	‎09-13-2023 11:15 AM
Posts	82
Total Helpful Votes Received	31

User Statistics

User Activity

Bootloop C3850XS in VSS configuration how to disable VSS from boot prompt running IOS XE 16.6.1

RCV-Err & Giants on 10Gb uplink ports on all my WS-C2960X access switches

DMVPN Performance vs Latency best practice

3750X Stable IOS version

Log filled with Psecure Message

Re: Bootloop C3850XS in VSS configuration how to disable VSS from boot prompt running IOS XE 16.6.1

Re: Bootloop C3850XS in VSS configuration how to disable VSS from boot prompt running IOS XE 16.6.1

Problem is solved, root cause

the last output is from

I am sure it's not a layer