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
Hello,the challenge is to transmit video (udp multicast) from a switch in a save environment to a media wall.The media wall is in an unsafe / uncontrolled environment. To ensure that no data or attack is coming from this side, I'd prefer to have just...
Hi everyone, we have some 3750X Cisco switches with port security enabled on all access ports, it happened a few times that the port gets shut down due to port security violation, after searching for the violated MAC I found two different cases. -...
Resolved! Why STP/RSTP sends BPDU on access ports?
I learned that STP/RSTP sends BPDU through access ports, but I didn't find the reason for that.Some points that I thought:1) As BPDU uses a multicast address, it should be forward to all interfaces?!2) BPDUs are sent on Access Ports to prevent connec...
Hello,I'm looking for the best practices to limit user throughput on interface/vlan connected behind Catalyst 3750X.What can you advise me ?Currently I use the following configuration to limit the port of the vlan50 on the 3750X-12S-E (See diagram 1)...
Hi, I have two cat 9410 showing below license statusThey are configured as stackwise virtual. What will happen after this time pass 28 days, 23 hours, 46 minutes, 40 secondsAlso do I need to register the smart license or not required ? Technology Pac...
Resolved! Unable to backup switch
I need to copy running-config from R1, R2, S1, and S2 to PC-B with tftp. It works fine for every device, except for S1. I am able to ping PC-B from S1, but I am unable to ping S1 from PC-B. Any help is appreciatedThank you
Resolved! MAnagement domain
hi,Port Vlans allowed and active in management domainFa0/13 1,3,5-6,8,10,26,33,52,100,255,783WHat is management domain mean here? VTP or sumthng else?
Coming from the old school of stacking 2900 35xx, I am really starstruck by the Nexis line and the new learnings I must do. No traditional stacking, I read why they think is best. Attempted to do a username <> privilege <> password <> command and c...
Hello,I try to play around with Packet Tracer and channel-groups.I added 2 c2960 switch and both gi Ports are channel group mode on.When I shutdown gi0/1 I could still ping the other switch. But when I add no shutdown, I could see, that both connecti...
Resolved! SG350 intervlan routing issue
Hi all together, I have problem with Inter routing on SG350. The configuration is : Default vlan1 : 192.168.1.3Network: 192.168.1.0/24Default gateway: 192.168.1.1 VLAN2: 10.0.15.1/24VLAN3: 10.0.20.1/24VLAN5: 192.168.2.1/24 I can't see hosts in v...
Hello Cisco,I am new to networking and VLANs, and I have a project now that I am stuck with.I have a router-on-a-stick connected to 4 huge networks. the topology is like the below image. I have also uploaded the topology.Topology I know it may be my ...
I am trying to terminal into the Catalyst Switch 1000 (C1000-8T-RT-E-2G-L). I am able to connect via port 1 and plug the IP address into my switch and see the GUI configuration.I want to learn the CLI commands and am trying to connect via putty I...
Hi,I have Windows servers that fall with an IP conflict on every reboot.When I checked the Windows server event log, I found a Cisco device with the MAC address "88-90-8D-18-4B-0C" as the source of the conflict."The system detected an addressconflict...
Hi Everyone, Good Day! I have a problem with my Cisco sg300 28 port gigabit managed sfp switch.The problem is i can't get the Gui via the LAN port.When i plug in the power cable the LAN ports on the switch just flashes once.No system LED indication.w...
Hello to everyone,I am trying to test the QinQ topology with the attached visual.I thought it would work with a simple one line configuration, but I didn't succeed.I am testing topology on Nexus9k on EVE-NG. Can you tell me where I went wrong?Device ...
