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Cisco Community is an active and collaborative place to learn more about our products and ask questions of peers and Cisco experts! Check out some of the most popular conversations happening right now!

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Meet Mark Elsen – VIP and 2025 Hall of Fame Recipient

Meet Mark Elsen – Community VIP and Hall of Fame member Mark is the 2025 inductee of the Cisco Community Hall of Fame. Mark began his academic journey in physics, earning a master's degree in 1982. His career in technology took root when he joined ...

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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.

GGlow by • Level 1
  • 241 Views
  • 4 replies
  • 0 Helpful votes

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...

abtt-39 by • Level 1
  • 4233 Views
  • 8 replies
  • 1 Helpful votes

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...

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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 ...

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...

Unable to Terminate CML Lab

I am unable to properly terminate "Cisco Modeling Labs-20251021T10491334".  As a result, I am unable to launch any new labs.  Does anyone know how to solve this problem?  Thanks in advance.

bftmcleod by • Level 1
  • 63 Views
  • 0 replies
  • 0 Helpful votes
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