Switching

Hello, I want to add a new cisco switch WS-C2960X-24PS-L to a existing stack cisco stack switches ws-2960s-48FPD-L. Cisco switches details mention below Existing Stack Switches model Switch Ports Model SW Version SW Image ---...

Hello All, I have a very basic query on Collision Domain and Full Duplex Mode. There are two types of logical topology ; Ethernet and Token Ring . Whenever we read about Ethernet the first thing that we are taught is CSMA/CD. It says that in Ethern...

We have cisco router and after checking the log I saw this message: pam_aaa:authentication failed from <ipaddress> -sshd[2909]  pam_aaa:authentication failed from <ipaddress> -sshd[2913] pam_aaa:authentication failed from <ipaddress> -sshd[3158] I w...

Dear All, We are facing a very strange issue on newly deployed application. We have recently deployed an Office Automation application using Alfresco platform using tomcat and configured on Centos 7.0. The setup is deployed on VMWare Esxi 6.0. DHCP s...

Dears, I have a 3750-X switch with LAN base license, i see the stack ports are down i tried to upgrade the IOS switch but still no luck, how i can know if the cables are faulty, what else are the chances for these port to not come up.when i reload th...

I have a known working SFP and C3850-NM-1G, known working connection..  We recently installed the new 3850 switch as our core at one of our buildings to replace a 3750.  When connecting the SFP, I am not getting a connection light on the port.  We in...

Hi and thanks in advance, I have a 2960XR that will act as a layer 3 router for multiple VLAN's. The 2960 XR has an EtherChannel to another switch that has the VLAN's with the physical devices connected. I don't have any physical ports on the 2960XR...

Hello. Trying to understand EIGRP route filtering. Using the following topology, where R1 has 3 loopbacks and has established an EIGRP neighborship with R2. I want to block R1 from advertising it's Lo0 route (10.0.1.0/24) by using a simple ACL and t...

We have a 3 switch 3750x stack, following configuration: Switch Ports Model SW Version SW Image------ ----- ----- ---------- ---------- 1 54 WS-C3750X-48 12.2(55)SE8 C3750E-UNIVERSALK9-M* 2 54 WS-C3750X-48 12.2(55)SE8 C3750E-UNIVERSALK9-M 3 30 WS-C37...

HI Need to remove the "ssh weak mac algorithms enabled cisco" vulnerability  for cisco routers and switch for all models 

Hello, I have a home lab that consists of 2 3550's and 1 1841 router. I'm learning about VLANs and trunking, and how to configure them. I've included a topology of the exact network that I've build to give you a better understanding of what i'm tryin...