Switching

Greetings,   We have just purchased a bunch of Cisco Catalyst 2960 Plus switches for a customers lifecycle service.   During the project I am trying to configure one of the new switches in our LAB, but when I connect the COM cable I am unable to writ...

Hi all,   I'm wanting to enable DHCP snooping and it's mostly working. However, we have some macOS machines that are configured in their System Preferences > Network to use "Using DHCP with manual address".  When DHCP snooping is enabled on my Cisco ...

If i shutdown the interface vlan by interface vlan 20 shut Then, would this shut down layer 2 vlan as well? If two hosts are connected vlan 20, will they able to communicate each other?

Hi everybody, i have two identical point to point connection each with 150Mbps of bandwidth. I run JPERF on the two links with the following settings: -TCP dual - 10 parallel stream (to saturate the bandwidth)   On the first link, every parallel stre...

Hello, I have two questiongs regarding VPC technology: 1) We have two basic VPC topologies (see the picture) What is the practical difference between that (green line) topologies ? http://imgur.com/a/vBv5Q 2) Do it's possible to run VPC using that...

Hi,I have a pair of 2248 Fex's where I'm currently terminating several VPC's to the servers, each with one port per Fex. Is it possible to run a VPC to a server with 4 ports, i.e 2 ports per Fex? I saw some discussions indicating it wasn't possible o...

Hello, I followed this document (https://www.cisco.com/c/en/us/support/docs/switches/catalyst-3850-series-switches/117594-technote-hicpu3850-00.html) in my troubleshooting.  The problem here I think is something that can't be expressed int this docum...

I am having issues with interVLAN routing on my SG300-28 switch. I have 2 VLANs 10 and 20. IPs are 10.1.1.254/24 and 10.1.2.254/24, respectively. I have them going to a Netgear R7800 which is connected through VLAN 10. VLAN 10 has internet access but...

We're booting out-of-the-box ISR1100 devices with dhcp.   The switch gets an ip from DHCP and TFTP location for config file. example: tftp:/cisco/configs/<device mac addr>.cfg   this works normally and the router downloads the config file which conta...

I recently purchase a Cisco ISR4351 security router but I have found that the Vif 1 feature doesn't work even though it has the securityk9 feature. Anyone know why this is not working?