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Hi , I have a switch 3750 stacked , I don't have IP-phone some of my links get up & down repeatedly (I see this in switches 2960 too) Jul 1 10:24:12.159: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/3, changed state to downJul 1 10:25:03.831: %LINK-3...

fbabashahi by Spotlight
  • 3787 Views
  • 12 replies
  • 5 Helpful votes

I'm working with a Catalyst C9500-32C on version 17.1.1. I have a QSFP-4SFP25G-CU5M module in port 2(the port is breakout enabled). Cisco Optics-to-Device Compatibility Matrix shows that QSFP-4SFP25G-CU5M is compatible with C9500-32C on version 17.1....

prafla001 by Level 1
  • 9354 Views
  • 27 replies
  • 0 Helpful votes

I'm trying to fully understand the flow of L2 traffic.Lets say there are two or three intermediate l2 switches between me and my default gateway.If I understand correctly, l2 to l2 does not inspect the l3 headers, meaning the switches don't know what...

Hello guys I just made this simple topology with 3 router, 3 switch 3 pc on 1 switch, 3 on other, and last switch with a web server (internet) and a dns server. I also activated RIP between all the routers and ACL permit on the router connected to in...

OwlKun by Level 1
  • 357 Views
  • 8 replies
  • 0 Helpful votes

Hi all, On a couple of C9500 40x in VSS I need to replace the 10Gb VSL links with 40Gb links. So I need to go from here: stackwise-virtual domain 255 interface TenGigabitEthernet1/0/39 stackwise-virtual link 1 ! interface TenGigabitEthernet1/0/40 ...

DaniloB by Level 1
  • 1122 Views
  • 7 replies
  • 1 Helpful votes

Consider the following scenario:Switch port on Cisco 3650 configured with authentication host-mode multi-auth and switchport access vlan 101Unmanaged 'dumb' switch connected to a switchport on the Cisco switchTwo devices connected to the unmanaged sw...

eku1s by Level 1
  • 213 Views
  • 4 replies
  • 0 Helpful votes

We have an issue since a long time upgrading the software of a Catalyst 9300 Switch. We are currently running 17.03.04 and wanted back then to 17.09.05 and right now to 17.12.04. The Problem, there is a virtualization machine connected with multiple ...

i am searching about the Eve Nexus 9k, which includes the VRF feature. I downloaded 9.3.9, but it does not include VRF. I want image series 9300Does anyone know what exactly that ver that I downloaded? ?

shahi22 by Level 1
  • 176 Views
  • 4 replies
  • 0 Helpful votes