Switching

Discuss Catalyst brand switches with peers and experts.
cancel
Showing results for 
Search instead for 
Did you mean: 
cancel

Labels

Forum Posts

Hi all, Could someone please explain to me why I see the things I do with MST? I have the below setup in a lab, where SW1 is configured with the lowest Cost and is the root bridge. Everything is working as expect, in regards to STP, and SW4 is Blocki...

rasmuselmholt_0-1751544990300.png

Hi, We received a replacement supervisor and upgraded the line cards software without any issues.  We notice the firmware versions are different the supervisors devices. The replacement supervisor unit has an higher firmware version on it then the ac...

I have 4 Nexus 9300 switches.  I am trying to assign them IPs and create a VLAN.  I noticed on one of the switches the default VLAN (1) has no Ethernet ports available except for the trunk lines 47 and 48 assigned to it.  When i created the VLAN it d...

John N by Level 1
  • 135 Views
  • 6 replies
  • 0 Helpful votes

I recently got an IEM-16P expansion module for an IE-3300-8P2S and cannot get it to pass POE. I've tried the expansion module on two separate 3300 base switches with the same result.  With a 48VDC 480W power supply I can power an IE-3300-8P2S with an...

dbronco by Level 1
  • 110 Views
  • 5 replies
  • 0 Helpful votes

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
  • 3734 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
  • 9294 Views
  • 27 replies
  • 0 Helpful votes

Hello Cisco community,  I have a Cisco 9200L.  For some reason, we have had no luck migrating from password 7 to password 6.  Each time I attempt config, it gives me an error.  I even tried a new switch for additional testing, but still gives same re...

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
  • 324 Views
  • 8 replies
  • 0 Helpful votes