Switching

I have multiple IE-2000-16TC-G-E switches that need to be setup to use DLR with some Rockwell CIP motion drives.  This is a switch that was requested by our customer.  I would have preferred to use the Stratix switches so I could get some AB support ...

Dear Friends, I have some old devices on my network and one of then is showing the message below every 1 minutes:   %SYS-6-STACKLOW: Stack for level Timer Interrupt Handler running low, 24/9000 I made a research but could not find any topic related...

Can a 3750E Cisco switch be connected to a 3750 using fiber? and what is required to have this done.

Hey guys. I have no clue what i'm missing here.  I have a device that lives on a cisco 4948e that I configured with the IP Helper (on the VLAN).  It's uplink goes to an IOS-XR device, which goes to another IOS-XR device and finally to the destinatio...

Dear all, I have two Nexus 3548 in a vPC setup, running NX-OS 6.0(2)A7(2) in a small on-premise datacenter environment. Attached to it are downstream switches (Catalyst) with LACP / vPC and ESXi 6.0 hosts without LACP / vPC (vDS in ESXi is configured...

Hi all, in the past we were using the following quite successfully on N5548-pairs with FEXes connected via VPC: Private VLAN trunks on FEX ports We use it to connect a single IP-network to ESX hosts in order to prevent the VMs on top to communicate...

Hi all,   I am facing an issue that i cant seem to solve. We face mac flapping on several ports at once, specifically trunks. It is a distributed network from core switches to several access switches. There are no etherchannels nor are there any dual...

It seems 40G can reach 400m over OM4, but is it standard? I read in the Cisco 40GBASE QSFP Modules Data Sheet: "Cisco 40GBASE-CSR4 QSFP Modules extend the reach of the IEEE 40GBASE-SR4 interface to 300 and 400 meters on laser-optimized OM3 and OM4 mu...

Hello, Gave a user Privilege 7 access. But when he uses the enable password, user gets full access. IF i create a enable password with privilege 7, the switch does not accept the password. What am I doing wrong ? Thanks

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?