Cisco Community

Technical question on networking

Hi,I am new to networking, but I have a question about setting up a home lab to learn routing and switching. I would like advice on whether I should prioritize real hardware or if GNS3/Packet Tracer is sufficient for hands-on learning.

Gratuitous Address Resolution Protocol (GARP)

Hello,I am going to migrate our telephony to SIP trunkWe will have 2 SIP fiber trunk links, with 2 AVAYA SBC (VM)The 2 ISP routers ( same ISP but two different fibers, one active and one in "stand by") will be connected to my core switch, I created a...

NDFC Multisite Issue MGMT inrerface DCI IFC links

Hi guys , i am testing NDFC multisite configuration over simulator EVE_ng .. deployed NDFC as a VM , and leaf and spine nodes topology under EVE-ng . For the VM external connectivity , i created a network cloud and attached all nodes mgmt interface t...

Impact of Concealing Cisco C9105AXW-E Wi-Fi 6 APs Inside MDF Furniture

Hello everyone,We are currently working on a hospitality Wi-Fi design that requires 100% coverage with a minimum signal strength of –65 dBm and SNR ≥ 30 dB across all guest rooms.Due to interior design constraints, the Cisco Catalyst C9105AXW-E is pr...

ACI: スイッチの /var/log/mcelog がログローテションされず、F1821 が上がる

2025年10月26日 (初版) TAC SR Collection主な問題 ACI Leaf / Spine スイッチの /var/log 配下にある mcelog がログローテーションされず、/var/log の使用率が高くなります。 SWITCH# df -h /var/log Filesystem Size Used Avail Use% Mounted on none 50M 50M 0 100% /var/log <<<...

ACI: "show platform internal counters port detail" で Core File が生成される

2025年10月26日 (初版) TAC SR Collection主な問題 "show platform internal counters port detail" コマンドを実行すると、極稀に下記のような vsh_lc の Core File が生成されます。 dbgexp_coreexp-default_<node name>_sysid-<node-id>_XXXX-XX-XXTXX-XXJST_XXXXXXXXX_0xXXX_vsh_lc.bin_log.XXXXXX.tar....

ACI: N9K-C9316D-GX が istack hap reset で再起動する

2025年10月26日 (初版) TAC SR Collection主な問題 ACI-Mode で動作する N9K-C9316D-GX が再起動します。機材が再起動する以外の具体的な影響はありません。再起動の原因を確認すると、下記のように istack hap reset となっています。 # show system reset-reason *************** module reset reason (1) ************* Reason: reset-tr...

ACI: CIMC を 4.3.5 以降に upgrade 後、APIC L4/M4 の起動に失敗する

2025年10月26日 (初版) TAC SR Collection主な問題 APIC L4/M4 で、CIMC をバージョン 4.3.5 に upgrade すると、起動時に以下のようなログが出力され、APIC の起動に失敗する事象が報告されています。 Error: open /factory/pbf/signdata/policy-2/b8/c30e61227526be5d848b423dea988117e1b9ec80eb35e3861a32537150cce1/info.json ...

Podcast files being blocked (Spotify / Megaphone)

Podcasts hosted on the Megaphone.fm service (owned by Spotify) are being blocked by the OpenDNS Family Shield service. Anyone else seeing this?

Mobility Express To 9800 Wireless LAN Controller

Hello,I am new to the Cisco Self Standing Wireless LAN Controller System. I have always used Mobility Express, and I know it is end of life. The purpose of this AP is for learning and using it in my home lab. I have read this post below:Migrate ME to...

Migrating Old iPSK Manager to a New Ubuntu SOE VM & Fresh iPSK Manager

Hi all — looking for advice and best-practice steps to migrate an older Cisco iPSK Manager deployment onto a fresh, managed Ubuntu VM while preserving existing endpoint/PSK data.Current SetupUbuntu 18.04 LTS (standalone; not joined to AD; limited mon...

Community @ Cisco Live 2025 - Melbourne

Meet Mark Elsen – VIP and 2025 Hall of Fame Recipient

Celebrate our 25th Anniversary all year long!

Community Activity