Hi, This morning we had a bunch of Cisco 8831 devices showing phone not registering and once we removed the Ethernet cable and put it back in they came back up and registered. Any idea why would this happen ? These 8831 devices  are connected to Ci...

Hi, We have a small site with a single L2 3850 switch connecting to an CE router. Currently there is two vlans (2 & 3) on the switch and the interface g1/0/1 connecting to the CE router is only an access port for vlan 2 traffic. We now need to carry...

Help, I working on replacing  3750 stack switch with 3850 stack switch at a remote site and currently the 3750 stack switch is running eigrp as the internal routing protocol. My plan in a nutshell is to change it from EIFRP to OSPF(company standard) ...

HI,I need to capture the traffic on several (specific) IP addresses using my laptop as the distanition using WireShark. I have my span ports all setup on the switch side I just need some help on setting up the filter with Wireshark where all I want t...

Any good reading material on Cisco NAC i can read up? Thanks,Jack