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
I have this assignment where I need to make this work. I am new, and I've spent 5 days without understanding what I'm doing wrong and why it doesn't work. The topology must not be altered. I must use OSPF and change the addresses shown in the picture...
This week, we’re exploring the Collapsed Core design! A simple, efficient foundation for real-world networks. Perfect for those just starting their networking journey!Inside:Lab topologyTasks to completeThis weekend, I’ll post a full step-by-step vid...
Resolved! source-interface vlan ICMP
Hello. I have two questions about ICMP behavior and Fregmansion behavior. All system jumbo MTU / all interfaces / SVI are set to MTU 9216. 1. Packets are generated and processed by the ASIC (data plane) when pinged without a source When pinged to the...
Dear community memebers,I need to test a scenario containing cisco nexus 9300 switches on a virtual lab. I tried to configure vpc on my switches both in eve and gns3. But I have a problem. I configured my switches, and the vpc is formed fine and is u...
Hi if add to uplink switchrouter bgp 65000address-family ipv4 unicastaddreggate address 192.168.0.0/24On all uplink Must be aggregate routes subnet 192.168.0.0/24 and onlyOne route announce to uplink 192.168.0.0./24Announce to uplink all routes inclu...
Hello Cisco Community!The Situation:Multiple departments have suddenly lost connectivity. Several links are down, redundancy is broken, and the network is unstable.You Have:Full device configurationsPhysical topology layoutConsole access to all switc...
Hi All, I am having strange problem on Cisco Nexus ( N9K-C93108TC-EX)SW01 & SW02 are in VPC sw01# sh vpc rolevPC Role status----------------------------------------------------vPC role : secondaryDual Active Detection Status : 0vPC system-mac : 00:23...
HiIs it possible to operate a C9400-PWR-2100AC at 10A/230V? I only found the following specs for Input current for the C9400-PWR-2100ACInput current (rated): ● 10.4A at 100 VAC ● 10.4A at 200 VAC https://www.cisco.com/c/en/us/products/collateral/s...
Resolved! Process Upgrade C9404R Dual Supervisors
Hi, In a few days I will be upgrading our C9404R switch which has dual supervisors from 17.12.04 to 17.12.06. I have some questions on it. Is there a preferred method for this? Is ISSU upgrade preferred, although I hear people facing issues with this...
Resolved! VTP version 3 - must enable vtp primary
Hi I set core switch as VTP server. Error: VTP VLAN configuration not allowed when device is not the primary server for vlan database. VTP STATUS: VTP Version capable : 1 to 3VTP version running : 3VTP Domain Name : tre02-ITVTP Pruning Mode : Disable...
I've found 4 switchports on two switches in our environment that are automatically reverting changes that are made to them. In this case, I'm attempting to simply change the assigned VLAN of the switchport and then bounce the port. When I look at th...
Hi, Is there any clarity on whether CVR-QSFP28-SFP25G can be used with C9500-32C and C9500-32QC? I see support for CVR-QSFP-SFP10G in release notes for 16.10 but no documentation exists for CVR-QSFP28-SFP25G compatibility on TMG matrix or release not...
Hi guys I purchased a refurbished Cisco Catalyst 3850 switch to uplink back to a unifi dream machine for 2 APs and a proxmox server also possibly 3 Zimaboard 2 in a cluster down the road but my concern is the catalyst 3850 went into EOL back in...
I'm just wondering how/where I can get this console cable (CAB-CONSOLE-M12=) so I can configure a IE-3400H-24FT-E V02 industrial switch. Any help would be greatly appreciated.
Hi,i have a two Hyper-V Hosts with Windows 2022 and 2025, these Server have 1GB NIC´s and have been upgraded with Intel x520 and X710 10GB Dual Fibre Channel NIC.Now, each Server has one Fibre Connections to C1300-12XS (A, IF 2) and one Fibre Connect...
