Activity in Technology and Support
how a router route a directed broadcast packet to another subnet
topology： R3---R2---R4R3 and left interface of R2 in 10.10.10.0/24;R4 and right interface of R2 in 10.10.20.0/24 subnet. when R3 ping 10.10.20.255,it receives a reply from 10.10.10.1 which is R2's interface in 10.10.10.0/24 subnet. why?In my opin...
vSmart - Time Sync Issue
I have 2 vSmart controllers in my environment. (Cloud hosted)Currently for both the vSmart controllers NTP is not configured. Due to this there is roughly 4 mins time difference between these 2 controllers.I would like to understand what the downsid...
Resolved! ISR4451-X: IPsec VPN after enabling securityk9?
Hello,I am planning to configure a site-to-site IPsec VPN on a Cisco ISR4451-X/K9 running in Autonomous mode.I entered the following commands and saved the configuration:configure terminal license boot level securityk9 end write memoryThe router now ...
Nexus K3P-Q port mirroring
Hi,According to the Cisco Nexus SmartNIC User Guide, the Nexus K3P-Q (formerly the ExaNIC X100) supports port mirroring. However, I can’t find a firmware image with this feature enabled. Could you point me to the right one?Thanks,
Stale cached A record for one domain (TTL 0) — can it be purged?
Hi,I own northernriversremovals.com.au and recently moved it to new hosting. Most resolvers picked the change up, but OpenDNS still returns the previous hosting address at TTL 0 across nearly every CacheCheck location, and the CacheCheck refresh does...
DevNet CML Sandbox Bidirectional Issue
Hello Fellas, I am having an issue with the DevNet CML sandbox, when trying to connect to my local Ubuntu VM inside VirtualBox. My host computer is a Windows 10. I do have connectivity from the Ubuntu VM to the nodes inside CML. I can ping them just ...
9300X PoE ports fail to establish Ethernet link after upgrade 17.15.5
Saw this bug CSCwv38239 - Catalyst 9300X PoE ports fail to establish Ethernet link with Vaisala temperature sensors after upgrade to IOS XE 17.15.5. Is anyone seeing the same problem with Cisco Access points on these switches ? All works on...
Subnetting explained simply
This is a 3 part series https://youtu.be/taPbECT-Txw?si=cd8loOUgCwv9PnyE
IOS 15.9(3)M13 ZBFW and VPDN on same router
I've recently migrated a classic CBAC configuration to ZBFW (I know drag me into the 21st centuary...) on a Cisco C921-4P router running the latest IOS. There are several 'inside' interfaces and two 'outside' interfaces. The outside interfaces are ...
MV53X LPR – Australian Licence Plates & Local MQTT Integration
Hi All,Quick question regarding the Meraki MV53X.Does the MV53X LPR currently support Australian licence plates, or is Australian LPR support on the roadmap?If supported, can MV Sense/MQTT publish LPR events locally to an on-premises MQTT broker for ...
ACI Ansible output parsing
We are working on several ansible playbooks to query our ACI environment without issues but the parsing of the output is not something I understand.I have a playbook that will query either the interface description or the description of an access por...
The Smart Mall Revolution: Cisco Spaces for Shopping Centres
CISCO SPACES · SHOPPING CENTRES The Smart Mall Revolution: Cisco Spaces for Shopping Centres Your mall already has thousands of people walking past hundreds of access points every day. The question is no longer what the Wi-Fi costs. It is what the ...
Resolved! 3802i fails to rollback to 5508 after joining 9800-CL
Hi,I'm working on migrating our 3802i from a 5508 to 9800-CL. The joining of APs to the 9800-CL is working but I'm not able to rollback to the 5508 running 8.5.182.7, which I am practicing in case there is a need. When I point the 3802i back to the o...
UCS 240 M4: Intel 810 NIC rejects CISCO-100G-LR-S - exceeds power req
HI TeamOn an UCS M4, the Cisco OEM Intel 810 NIC rejects the Cisco-100G-LR-S Module with thiserror message "The module's power requirements exceed the device's power supply. Cannot start link".This LR-S Module advertises its power as 4W.Intel Release...
SG350 Fatal Error
HI,Today I started getting the following error on my SG350 switch. No firmware upgrades had occurred and was stable to this point?Is there anyway around this other that returning the switch? User Name:29-Nov-2023 12:37:49 %HAL_config_poe-F-POEInitErr...
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