Switching

Hey, I am currently studying for CCNA and I could not get my head around why DAI would need to inspect the destination MAC address to mitigate ARP attacks since the destination MAC address should always be the victim. Any help in understanding a scen...

Hello, I'm reaching out as I recently performed a Firmware upgrade on a WS-C2960S-24TS-L swtich stack (2 switches) from software version 12.2(55)SE3 to 15.2(2)E9. The upgrade appeared to go well but once the switches fully booted I saw our redundant ...

Hello experts, We arenot able to ssh to our new core switches:   Switch: 3850 Software version: 16.3.5b   Error:350259: Jun 11 08:23:48: %SSH-3-NO_MATCH: No matching kex algorithm found: client diffie-hellman-group1-sha1 server diffie-hellman-group-e...

Hello,I have an interface on a 4948-48port that temporarily snmp's some high discard rate events, that always are short lived. I am going to open a case I think but I thought I would ask the question here what might be going on. Any help would be app...

Hola buenasHe abierto un archivo de packet tracer y me he encontrado con el error de la foto que adjuntoNo solo me ha pasado a mi sino también a algunos de mis compañerosEl Packet Tracer proviene de un link a una página que contiene cursos anteriores...

I have a number of ESS-3300-NCP switches bought from different sources and would like to know the firmware version that is loaded without installing them. Can this be determined by the serial number?

Hi All,   I am going to be installing a few 9300 switches at my location and I am looking for a guide or information about activating the inbuilt WLC on this platform.   Does anyone have any guides or information on how to activate this feature set? ...

I'm currently have several WS-C3850-24T, 16.12.08 (CAT3K_CAA-UNIVERSALK9)I'm monitoring with Observium and it's showing that the current temperature value is beyond the "Min Warn" value.This value is being read from the devices.  (if I manually chang...

I need 2 type of switches: Access switch (Qty - 7) - with 48 1Gb RJ45 & atleast 2 10G RJ45 ports, stackable(Group 1 - Need to stack 4 swicthes and Group 2 need to stack 3 switches )Core Switch (Qty 1)- 16 or 24 port(8 10Gb RJ45 & rest 1G/10G RJ45 por...

Please Help!I want to factory reset config my switch, but i factory reset all and now my switch not have OS,i was download the bin 9200L 24T 4G from here https://software.cisco.com/download/home/286319874/type/282046477/release/Dublin-17.11.1?i=!ppan...

Can someone send me URL for Power calculation tool required for power calculation of 4500 switch for number of POE linecards support

Hi Guys,Recently ran into a problem. I enabled a simple 802.1x authentication on the switch and recently noticed that some ports had a large number of MAC addresses, when in fact only one PC was connected to that interface. Do you have any suggestion...

Im trying to have inter vlan routing using layer 3 switch but failed. Below is the routing table of layer 3 switch. Any help is highly appreciated. Gateway of last resort is 192.168.0.251 to network 0.0.0.0C 192.168.120.0/24 is directly connected, Vl...