Hello, Cisco Community!I’m really happy to share that I’ll be hosting the Cisco Community Lab Series, a brand-new hands-on learning journey designed to help you build practical networking skills step by step.Every Thursday at 8 PM EST, I’ll post a ne...
Forum Posts
Clarification of this bug:Regardless of the configured timers (reachable-lifetime xxx, stale-lifetime xxx, down-lifetime xxx), the states DH4 in the DT table have the following validity:VERIFY (approximately 13 minutes)STALE (approximately 45 minutes...
I am having issue with one of my desktops connected to my switch interface flipping between two MAC addresses (see the attached picture below for log). When I disconnect the desktop the IP and the MAC issues will not show in the log. I reimaged the ...
Does anyone have any practical experience with 9300 (non L, non X) switches and the short 30cm stackpower cable? The stackpower cable is only available in 30cm and 150cm. That's a big jump. Some of our switches are 4u's apart. The rack is organized l...
Resolved! How to Read Cable TDR Testing Result
Hi network gurus, I have a hard time to determine which part cable is broken at below. Do both short and open mean that we have cable issue from patch panel to the Ethernet port on the wall (the cable run inside the wall/ceiling), and the ...
I have a question about the following default values in Catalyst 9000 series version 17.12.5.・no thermal shutdown disableI have a concern that the temperature will rise and the power will be turned off when the FAN fails.・no ethernet reuse subInterfa...
I am having trouble configuring the C1300 and Dell 6224 switch.On the Dell side, I received the following configuration:The assumption is that traffic in VLAN150 is tagged, and I have no problem with that. The problem is with VLAN1, which is supposed...
Hello. I was searching for information but i cant find if switch IE-3400-8T2S-E should be connected with communication wire between expansion module IEM-3300-16T ?
We are planning to replace two Cisco Catalyst C9300 switches that are currently configured with HSRP.Could you please recommend the best approach to perform the replacement while minimizing service downtime?Any detailed guidance or best practices wou...
Hi there, I'm working to change the boot method from BUNDLE to INSTALL, and before doing that, I'm checking more packages.conf file to ensure the packages are the same version as the running IOS in the switch. However, it's not. [ Switch 1 ] Active...
Hello all, I'm having a very strange issue with a 3rd party purchased 3850 WS-C3850-24XS stack. I am using the Mgmt-vrf to manage the switch and pings work when you source from that vrf. But pinging without the source of vrf doesn't work NOR does it ...
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...
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...
Hi, is it possible to use breakout cable QSFP-4SFP25G-CUxM in Cisco Nexus N9K-C93108TC-FX3? On the tmgmatrix.cisco.com stays it is compatible but in CCW there is no that cable option.
HI,Planning to upgrade 6807 in VSS Quad-SUP using ( Fast Software Upgrade )From version s6t64-adventerprisek9-mz.SPA.155-1.SY7 TO s6t64-adventerprisek9-mz.SPA.155-1.SY10.bin Have few hours of maintenance window and would like to know best approach fo...
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....
