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MAC Address issue on Cisco c9300

Can anyone explain why a burned-in MAC address might deviate from the logical numbering scheme? Typically, the MAC addresses for a switch’s ports begin with a base MAC address and increment in sequence, corresponding to the port numbers. In our case,...

Tec1do by • Community Member
  • 238 Views
  • 6 replies
  • 0 Helpful votes

Replacement ASR1000 OTV DCI Layer2 Extension

We are using ASR1000 for OTV DCI Layer2 Extension between DC with DR but ASR1000 will be EOS in next year.So Can we using Cisco Catalyst C9300X-12Y-A for Replacement ASR1000 and convert OTV DCI Layer2 Extension to VXALN for Layer2 Extension between D...

p by • Frequent Visitor
  • 24 Views
  • 0 replies
  • 0 Helpful votes

O switch está funcionando. Por que precisamos agir?

Vulnerabilidades em equipamentos de rede · Artigo 1 de 6 ·  Roberta MartinsHá alguns dias, abri a porta de casa com a chave errada. A porta abriu. A chave ficou presa.Quando examinamos a fechadura, descobrimos que ela estava desgastada. A chave certa...

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Roberta01 by • Level 3
  • 128 Views
  • 7 replies
  • 4 Helpful votes

Cisco Expressway MRA with let's encrypt issue

I have a Cisco Expressway deployment configured for both WebRTC access and MRA phone registration.I'm experiencing an unusual issue depending on the certificate used:With a self-signed/OpenSSL certificate: MRA telephony service works correctly, but W...

Webex - Calling dock not showing numbers since latest update

Hi, Since the latest version started rolling out last week. We have multiple users all facing issues where the calling dock is not showing the number in the area it used to. Attached screenshot should and previously has shown the number of the callin...

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ECUT-IT by • Level 2
  • 236 Views
  • 4 replies
  • 0 Helpful votes

Resolved! Cannot restart CAR DB

CUCM 14....   When attempting to look up CDR using the CAR interface, customer gets a pop up saying "Last run of CAR loader is interruped..." Cannot find anything about this situation, so we attempt to restart all the CAR services.  That went fine un...

CliffordMcGlamry_0-1699546581643.png CliffordMcGlamry_1-1699546620585.png

FMC virtual Firewall Management

I'm unable to download the new Firepower Management Center virtual upgrade software. (No entitlement) I was able to download all prior to my license expiring. I went with a new vendor and now I'm only able to download the FTD software but not for the...

djohns777 by • Frequent Visitor
  • 107 Views
  • 1 replies
  • 0 Helpful votes

OpenDNS DoH returns RCODE 5 (REFUSED) for multiple domains

Hello,We are investigating unexpected DNS resolution behavior observed on November 10, 2026.We tested the OpenDNS DNS-over-HTTPS endpoint at doh.opendns.com/dns-query.We sent A and AAAA queries for the following domains:smmtouch.comsmmtouch.storedev....

Jrogor by • Community Member
  • 71 Views
  • 0 replies
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