eXR: NCS540/NC55-RP2-E/NCS-55A1 PTP/SyncE がクロックに同期しない

2026年1月23日 (初版) TAC SR Collection主な問題 eXR で動作する以下のルータにおいて、タイミング IC に問題が発生した場合にエラーが通知されず、PTP、SyncE の同期状態に問題が発生します。   対象製品(PID) NC55-RP2-EN540X-ACC-SYSN540-ACC-SYSN540-24Z8Q2C-SYSN540-24Z8Q2C-MNCS-55A1-36H-SNCS-55A1-36H-SE-S     エラー発生時は Perfor...

C9120 Rx Stuck using 17.12.5

Since we upgraded to 17.12.5 on our 9800 I see these logs from 9120 APs:...Rx stuck detected,doing phy forcecal for radio 1Has anyone else noticed this or know what they mean? It doesn't sound good.

Cat9k 17.15.04 VOIP Issues

Reporting a bug: My team and I have discovered a bug associated with cat9k_iosxe.17.15.04.SPA.bin. We began testing the version to roll-out as it is now the gold star, and found that when a Cisco VOIP phone (any model really, we tested conference pho...

TEst

Switch Catalyst 2960-S

Hey,I am working on a class project on a switch, but the switch doesn't have an iso file to read to boot, which makes it unusable. I tried downloading it from a USB drive, and it was saying there was an error to boot (discovered later that the USB dr...

AI Automation / Devops

Made a post in the wrong forum. Hopefully this is the correct one. Does anyone here have any experience with AI automation tools? We have been looking closely at tools like Cisco AI Canvas, and other 3rd party tools like mploi.ai and was curious if a...

AI Automation / DevOps

Does anyone here have any experience with AI automation tools? We have been looking closely at tools like Cisco AI Canvas, and other 3rd party tools like mploi.ai and was curious if anyone is using these tools to assist with troubleshooting or automa...

IPv6 Standards Uncovered: Inside the RFCs​

Dive into the core IPv6 specifications and explore the standards that shape the protocol. Gain clarity on RFCs and understand how theory translates into real-world networks.​​

Deep Dive Data Center Networking for AI Workloads

Explore the essential networking requirements for AI workloads in the data center. Discover Cisco's innovative AI datacenter solutions, including NX-OS, ND, ACI, and HyperFabric - designed to optimize performance and scalability.

Secure network analtics syslog

can cisco secure network analytics use firewall syslog ingested from telemetry broker for analysis. and how can i configure SNA to receive syslog?

Deep dive on DC Network Readiness for AI workloads

Explore network requirements for AI, learn best practices for AI-ready data center networks, and assess your current infrastructure’s readiness for AI deployments.

ACI upgrade failed.

Hi, I'm trying to upgrade my APIC from 6.0.(8f) to 6.1(5e).  I receive the following error.    Upgrade hook failed: /firmware/installer_iso_mount/insieme/mgmt/support/insieme/upgrade_hooks/pki_encryption_check.py for capability pki_encryption_check. ...

Catalyst 9300x-24HX

Hello everyone,I have a cisco 9300x-24hx and I am experiencing a weird issue where my switch is crashing repeatedly throughout the day. Every time it crashes a crash report is created, but the logs within the switch don't indicate something being wro...

Replacing L4/L7 device

Hi,We need to replace a virtual ASA in HA (active, stand-by) which is currently in production attached to multiple service graphs, so the process must be as smooth as possible. I was thinking on setting the same IP and MAC address on the new firewall...