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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...

Hello everyone,  Since 2017 Cisco now supports OSPF over VPC links, I am going to be redesigning some stuff on our Datacentres and would like to just get some input into the design. Below is a visio representing what I intend to do. Can anyone se...

Hello, I'm setting PoE on the doors of a Catalyst 3560-c PoE switch. Through the Putty, ticking Telnet, I tried to configure it so you have 10 watts for each port so you can make all the PoE ports. Unfortunately, the screen I see when I insert the "s...

we are checking the issue of The STP Topology of B1 has changed on Gi0/21 port, B1 's G0/21 port connect to switch B2's G0/21 port, both are access port, we checked the log, it says stp topology change, but what are  reasons can cause stp change?

Just got a few new 3650s, and we noticed the WSMA commands in the config wsma agent exec profile httplistener profile httpslistener!wsma agent config profile httplistener profile httpslistener!wsma agent filesys profile httplistener profile httpslis...

Kyle Z by Level 1
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I have 2 cisco switches a SG200-26FP and a SG350XG-26F  i have connected both switches via fibre and i am able to connect to all devices connected but i am not able to access the interface on the SG350XG-26F but if i connect the 2 switches via CAT6 c...

Dear all, I have a problem of dhcp conflict on my core switch cisco 4500 E. Everyday i have found some of my IPPhone device get lost ip address, when i check in core that is so many ip dhcp conflict, so i type command clear ip dhcp conflict, after ...

ferly0001 by Level 1
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%C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET: (Suppressed 1 times)Packet received with invalid source MAC address (00:00:00:00:00:00)Latelly I been seeing the following syslog messages...after a quick google search it could be related to ESX VMWare.  Anyo...

opers13 by Level 1
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Most of the 4500 Switches in our network are giving the similar error for so many ports%C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET: (Suppressed 1 times)Packet received with invalid source MAC address (00:00:00:00:00:00) on p  t Gi2/6 in vlan 100Its impos...

jennyjohn by Level 1
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Hello ,I have Two questions about ntp Configuration: first : If we wana ntp gets the information only by NTP window server, Is the configuration on Switch is Correct : NTP window server IP : 172.20.70.5 Switch# configure terminal Switch(config)# ntp...

ali_alavi by Level 1
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