Activity in Technology and Support
C3850-TFTP Error
I'm trying to copy IOS image for C3850 switch by TFTP %Error opening tftp://A.B.C.D/cat3k_caa-universalk9.16.12.13.SPA.bin (Timed out)
ISE Error
Hi All,I tried to log in to ISE, and the attached error appeared. Can you please help?Regards,
Windows Search Problem on computers Win11 and Cisco Secure Client
We are experiencing unusual issues with computers running Windows 11 that have Cisco Secure Client 5.1.6.1307 and Secure Endpoint 8.4.5.30483 installed. The problem is that Windows Search suddenly stops working and just keeps spinning without returni...
VPN
Hello everyone i have vpn connectivity between my sites everything look good yesterday i checked my tunnel and tunnel in down state i start troubleshooting i found this log%CRYPTO-4-RECVD_PKT_INV_SPI: decaps: rec'd IPSEC packet has invalid spi for de...
How to use Time-Domain Reflectometer (TDR)
I’m no electrical engineer, (the closest experience I have with electricity is the amount of electrocution I received when I was a child [due to faulty cabling of electrical appliances]) so I will spare readers technical jargons and boring formulas b...
Nexus9000 C93180YC-EX upgrade
Hello everyone,Recently my two Nexus switches hit the bugs which confirmed by Cisco TAC engineers. I am now researching on the process and the software to download.The bug issue is CSCvz65993. I checked that I can directly upgrade to 9.3(9) or above,...
OpenDNS not resolving - Cisco Umbrella
In the last few weeks we have issues with openDNS which does not resolve hosts, but other DNS do.At the moment it is e.g. frank-meisler.com. OpenDNS does not resolve, but EU-DNS, Cloudflare and Google-DNS do resolve it.Paying a lot of money for this ...
Clarification on "Unicast Routing" Option in ACI Bridge Domain
Hi Cisco Community,I’ve been reviewing the Official Cert Guide (OCG) for ACI and have some questions about the "Unicast Routing" option in Bridge Domains (BDs). Here’s what I’ve understood so far:When "Unicast Routing" is enabled on a BD, the default...
Red Teaming for AI Security
The image illustrates an AI system (represented as a brain within a shield) being attacked by various threats including Data Poisoning, Prompt Injection, Model attacks, Bias Exploitation, and Model Stealing. When you’re building som...
CIMC Upgrade from 2.x version to 4.x version
Hi All,We're trying to upgrade the CIMC of APIC from version 2.x to 4.x of UCS M4 200 Server but facing issue. We tried upgrading using both CLI & GUI but failed both way multiple times.Anyone has any idea about how to resolve this issue.Regards,Vikr...
User and Machine Authentication
Hello Am having troubles getting my WIFI to work with machine authentication and user authentication i keept trying to reauthenticate every time im not really sure why it doing it at the machine authentication part, but it get that correct. this is w...
Understanding FlexVPNs
Understanding FlexVPNs Introduction FlexVPN Components IKEv2 Keyring IKEv2 Profile IPSec Profile Virtual Template Tunnel Interface Conclusion Introduction We knew...
Unable to change password on vManage after attached template - 20.12.5
Hello community,So I ran into this problem where I have my default admin password and never changed it. On the GUI I always had a warning about using the default password. I tried to change it before but for some reason, I couldn't, so I just ignored...
CISCO CBS110 Unmanaged 5-port for NAS storage connection
Good day,if possible I would like to ask for help with choosing switch. I want to connect two NAS storages, but have only one cable, so I want to buy a simple unmanaged switch for being able to connect them both.I found CISCO CBS110 5-port switch (CB...
video calls not working (cisco ip phones 8865) in cisco ISR 4431
Dear Team,video calls are not working on cisco cme (cisco isr 4431). we are using cisco 8865 phones and registered in cisco 4331 Voice gateway.Please do the needful
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