Hello, Cisco Community!I’m really happy to share that I’ll be hosting the Cisco Community Lab Series, a brand-new hands-on learning journey designed to help you build practical networking skills step by step.Every Thursday at 8 PM EST, I’ll post a ne...
Forum Posts
Resolved! 2960-x interface error on boot
Hi all, I have a 4 stack of 2960-x switches that I recently installed and the master switch is displaying the error in the photo on boot. Is the TenGB port bad or could it be the cable? I do have another cable ordered to test. Thanks for any and al...
Resolved! UDP
UDP can transmit data at a rate higher than the path capacity. is this statement true ?
Hi, We have a bizarre issue where seeing very degraded performance on a number of vlans on a cat6513 with a SUP720-3b. Version 12.2(18)SXF8, There appears to be loads of flooding going on. Any idea's on where to begin to troubleshoot this pl...
I’ve yet to actually get an answer that has helped me over the past few months when it comes to getting a 4321 router working as a router. This is simple simple stuff that I need to do (I just need the functionality of a $30 router – I’m paying for...
Resolved! AUTO-TUNNEL CREATION
I just configured my router for connection with exchange using ospf routing protocol to receive multicast traffic. but when i issue the command "show ip int brief " on my router it shows tunnel interface.The interface is automatically created and t...
Hi, I have a WS-SVC-IDSM-2 which is showing as PwrDown looking at the show power there is more than enough but there is an error message "Module Failed SCP dnld" does any body know why this is showing? it is something to do with the rom version. Rega...
I have a strange issue that I am having trouble finding a solution. One building on our campus loses connectivity every few months. When I troubleshoot the 3850 for that location, I notice an exponential increase in crc errors on the link back to ...
Resolved! 3850 v-mismatch
I have a 3850 stack with 3 switches. They been up for half a year or so without any issues. Today 3rd member switch shows v-mismatch. I don't have autoupdate enabled. What would be the best way for me to fix the issue with least amount of downtime....
Hi everyone I want to upgrade an 8 port 2960cx and I was told instead of me assigning a static IP to my laptop I could use these commands to get an IP on the switch so that I can upgrade the IOS Vlan 2 name Data interface Vlan2 ip address dhcp clie...
This happens when entering the command: software install file usbflash0:cat3k_caa-universalk9.16.03.03.SPA.bin new force on-reboot Boot variable screen shot is attached Directory of flash: is attached
Hi Guys Run into an issue with Cisco firepower module, I have a link coming from my ASA management port and going to a switch port within the same VLAN as the firepower module my issue is that on the switch side I have GigabitEthernet1/0/21 is dow...
I know a little bit about QoS, and by that, I mean basically nothing. I have set up autoqos (trust dscp) on our switches. Everything is okay for the most part, but I feel like the config is not optimal on a number of switches. For instance, queue 4 o...
Hi All, I'm unable to enter this command for some reason. Does anyone know if it is not supported in packet tracer...I could have swore I had entered it before. same-secuirty-traffic permit intra-interface
Resolved! 2960 Switch 48TC-L crashed
Hi All, I had a Switch 2960 48TCL that had crashed without any reason. I found out some log information of this switch on log server as below. Is this a software issue. Do I need an IOS upgrade? Mar 4 01:26:52 192.168.9.72 : %TCP-2-INVALIDTCB: I...
Hi All. I have upgraded a Cisco 3850 switch(Stand alone) to 16.3.6 version. After copied the image into switch flash, I have changed the boot variable to 16.3.6(New image). But When I do reload the switch, I lost the remote session for that switch. ...
