Switching

I want to understand QOS and COS, and for some reason can not understand how to setup one vs the other, and when one is used vs another, or how they are used together.  If the port that a device is plugged into, never ever uses up all the bandwidth a...

I have a Dell 6248 switch with three VLANS defined (1,2,10).I need to expand VLAN 10 (need more ports) on the Dell Switch.I have downloaded the Cisco CNA. In the attached screen of the CNA, am I on the correct display to create a new VLAN 10 ?What is...

Hi All,I am trying to isolate issues noticed with packet drops on our core layer 3 switch 3560.  To give you guys the layout...we have 3 access 48 port Cisco 2960 switches running off the core for client access.  2 additional Dell switches are also c...

I'm new to cisco and currently building a midsize environment and wanted to know what is the best practices for administration management of cisco equipment? Thanks!

Can someone tell if 10GB Network Modules C3KX-NM-10GT OR  C3KX-NM-10G (with SFP+)on a Catalyst 3560X can be configured to connect to a 10GB server ?  In all datasheets they are described as "uplink ports". And I fear this means only "trunk" ports wit...

Hallo Guy´s.    I have a problem with a 4510 Switch with Sup 7 and VSS. sometimes i get from my management System a error message that i have drops. When i look at the Switch i see with a show interface the following output.   GigabitEthernet1/1/20...

After going through the config on one of our switches I noticed some QoS settings that I have no idea what they mean and was wondering if someone could help me understand what these settings mean. Here is the config I found plus the config on one of ...

Hi All,I have running VPC with two nexus 5k with down host like a triangle.Now concern is i have a vpc 30 and only 1 member both side. But in morning i have allowed (Already created) one more new vlan in port channel 30 on nexus 5k1. But forgot to al...

I have not been able to find an answer to this on my own, so turning to here for help. I have a 2960s that that has a trunk link back to a 4503. On the 2960s end of the trunk I have a 100BaseFX SFP. When I do a sh int on that interface, I get:  sh in...

                                 Hello.I discovered a strange network  problem.  Network  Core consist from two 3750 in stack. There are 18 Vlans on Cisco 3750.  Each port of core connect to switch. When I ping  gate of the vlan, for example Vlan8,  ...

Hi all,This type of Question probably has been asked before but here goes:We have Nortel IP phones connecting to 3750 switches.Port security on the interfaces. A data and a voice vlan.Plugging the phones into the switch the phones work fine, plugging...

Hi,I was just looking to clear all of the current spanning-tree counters after making some changes. I have used the command "clear spanning-tree counters" however this only seemed to clear the interfaces stats such as number of BPDUs sent and receive...

Hi, is it possible to disable the stacking mode on a catalyst 2960x?There is no stacking module but the stacking state is always ready:Switch#  Role   Mac Address     Priority Version  State----------------------------------------------------------*1...

Hello, I just configured DNS server on my cisco 1941. From the router, i can translate google.com and ping the world. As a switch I have the EHWIC-D-8ESG-P and the EHWIC-VA-DSL-A as modem. The machines can comunicate from each other:sun (the default ...