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
All: I'm about to run a P.O.C. evaluation of MACSEC/TrustSec technology. For part of that, I'll want to validate the encryption of the payload inside the Layer2 Frame payload on the wire (and the details of the MACSEC 16 byte header) If I use a SPAN ...
Hi, i´m Juan from ArgentinaI was reading at very granular detail about STP, to my CCIE Written Cert, and i have one scenario where i don´t know how STP works.If i have one 2 L2 ring, STP converge in the midle of the ring, one switch has his port in ...
Dear All,I have done the IOSXE upgrade for the C9500-24Q from 17.06.05 to 17.09.04.The upgrade was successful.I got only one error:Sep 26 15:31:59.521: %ISSU-3-ISSU_COMP_CHECK_FAILED: Switch 1 R0/0: install_engine: ISSU compatibility check failed for...
Resolved! ACL on Interface VLAN
Hello,I was tasked with setting up a subnet on vlan 250 (172.29.1.0/24) that allowed any users on it access to the internet but not private IP's, so ACL below:IPV4 ACL OPEN_INTERNET10 deny ip 172.29.1.0/24 10.0.0.0/820 deny ip 172.29.1.0/24 172.16.1....
Hello everyone, I'm having an issue with the Smart License registration on a 9200 Stack running Version 16.09.04. Altough in both the Core Switch (an old 4500) and the access switch I'm trying to register (9200) I have configured the same name server...
Hi allI have a frustrating issue and so far I wasn't able to solve it.I'm using a CISCO switch CBS220-48T-4G together with a ubiquiti edge router.I configured a DHCP server on the router and a VLAN which gets untagged at the switch port e.g. Port 2.N...
I am faced with a situation, I have a switch that has a /24. The mgmt. IP for the switch is .21 as example (10.0.0.0/24 -- 10.0.0.21 SVI -- Default Gateway 10.0.0.254 which resides upstream on a next hop router. My switch is layer-3 with an IP rout...
i'm replacing a standalone c4507r+e (runs iosxe3.11.07.E) with a c9407 (runs iosxe17.3.5). trunked to the 4507 is a stack of 3850s (runs iosxe16.12.7). every vlan on every 3850, 4507, & 9407 uses the default priority of 32768 (so the bridge id for vl...
Hello,Currently I have a Cisco 3560x that stops working at random times. Sometimes the issue happens once a week, or twice a week, or 2-3 weeks will go by with no issues.Since this is my core switch the entire network goes down. So far the fix for t...
Hi all, new here and still pretty new with networking...I work in the broadcast industry and my company has been using Cisco Catalyst switches with VTP Client/server between Distribution and access switches.Now the company is moving to Spine/leaf arc...
Hello Cisco community,I hope you're all doing well. I'm currently working on extending an existing MIB file to include a new OID for a specific network device, and I could use some guidance on the process. I've been a long-time user of Cisco products...
Hello AllI have created a Proxy for the Smart Lic and I am testing this on a 9200 Switch. I have enable the following command and waiting to see if they switch will send the Http request to the proxy server. Since this is the only device I have set...
I have 5 switches with links going to each other in a star topology. Now, Switch 3 is the root bridge but when i power it off it takes about 12 seconds to switch over to switch 2 which is configured to be the next root bridge if a failure occurs. Doe...
Is there a way to disable multicast filtering through the CLI on the Cisco Catalyst 9200L?
Resolved! RAM message port forwarding - CBS 250
Dear all, can you explain me why this happens? I've 5 pages like this and PC is running normally.Thanks
