Switching

HiI'm upgrading a number of WS-C3650-48PD stacks from 03.07.05 to 16.6.6The upgrades are going well (with the odd switch stuck in "provisioning") but something odd is happening with DHCP snooping. I have the following dhcp snooping in place for all v...

Hi All,Yesterday evening faced a strange issue with my Nutanix infra. Sharing background of my setup and issue faced. My setup1) I have 5 node Nutanix cluster2) Connected to 2 Cisco 3850 XS3) Nutanix Nodes are directly connected to both 3850 via fibe...

Hello, Another weird behavior that my be related to my other post but as I'm not sure, I prefer opening a new thread. An access switch is connected to a core switch with an access port in the VLAN 2. From the core switch logs, I can sometimes see the...

Hi,I want to deny L2 traceroute traffic as stated in this article (https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-l2-traceroute)However, none of my 3560g/3750g switches has drop command. Is there possibility t...

Hi, I have a Windows DHCP server and two Cisco 3850 switches.I need to achieve redundancy between the DHCP server and core switches in case of a failure of one core switch.What should I configure to make DHCP server redundant? Best regards,MelankaP.S...

HiI'm trying to work out the best way to dynamically assign a port based access vlans to equipment connected to a single Catalyst 9300 stack ideally without setting up 802.1x Port-Based Authentication. The end points and bits of field equipment that ...

HiCould anyone let me know whether each vlan can define 2 ip helper-address ? Example below which i have this existing vlan in Switch:- interface Vlan100  ip address 172.30.49.254    255.255.254.0  ip helper-address 172.30.48.5  no ip redirects   ntp...

A new challenge for me which our organization is going to rollup MS TEAMS very soon. However, I stuck those requirements how to apply QOS in our L3 switches that requested by our voice vendor as below:-Voice, Video and File sharing traffic originatin...

Hi All, I have a strange issue regarding the catalyst6500, The CPU get overloaded for shot period of time. The culprit process is "PIM" which occupies more than 50% of CPU. Could you please help me to troubleshoot and figure out the root cause. Thank...

Dear All,this is first time I try to ask Cisco Community how to solve a problem.My old Cisco MDS 9513 fiber channel switch is not usable due to a dual failure on both supervisor-2 elements.Both the two supervisors have a red status led. So, I decided...

Hi, I’m struggling with topic of Link Aggregation in my home LAN for while already. I have SG200-26 26-PortMy goal:Connecting two or more nodes to get speed between them higher than 1 Gigabits. Eg. FreeNAS server with zfs pool – 4x HDD in RAIDZ – 3x1...

So, I have noticed issues with several Cat9500, where only ports on the active switch are utilized in LAGs spanning members. This occurs when traffic crosses an SVI boundary. Here's the kicker, Cisco says it is as expected (SR686413667). This problem...

HI,I was going through adjacency options for isis p2p and broadcast network. For broadcast isis have mechanism for three-way handshakebut for point-to-point link there must be p2p three-way handshake TLV present and here is the confusion.I captured s...