Is there a way to configure either a switch or a router at a small remote site to find rogue DHCP servers such as a user plugging in a home wireless router that issues IP addresses to clients?   I know we could configure DHCP Snooping to only allow DHCP broadcasts from a particular MAC Address (in this case we issue legitimate DHCP addresses from the remote sites 3845 router) however I would be happier to be able to just determine a particular switch port that has a rogue DHCP server on it and shut it down.   Is there an easy way to do this?   The basic configuration of a typical remote site would be something like this: Headquarters-----------------------RemoteCiscoRouter-------------CiscoSwitch--------------------CiscoSwitch-------------CiscoSwitch Typically Remote Routers would be 2800 or 3800 series (Acting as the gateway and DHCP Server) and the switches vary but could be in the 3550, 2960, or similar switches.  The remote sites are on a single layer 2 VLAN/Subnet.  What do you think?   ... View more

We purchased a couple Nexus 5596T Switches that came with older firmware on them: n5000-uk9.5.2.1.N1.4.bin and n5000-uk9-kickstart.5.2.1.N1.4.bin I would like to update the firmware before putting them into production.  I notice there is version 5, 6, and 7 software versions available for these switches.  Does anyone have a recommendation as to which version is best (and most stable) for production use?  I will be connecting various EMC and Cisco Storage and Server devices to these switches at 10 Gbit speeds either 10GigBaseT, 10GigLR SFP+, or 10Gig SFP+ Direct Attach Cables?  What would you recommend? Also, do I need to load the kickstart or main software first?  I do have Cisco Prime Infrastructure and am planning to push the software updates from there.  ... View more

I am in need of a 10 Gbit Switch with around 24 SFP+ Ports and a minimum of 4 10GigBaseT Ports.  This is for connectivity to several EMC Devices and UCS Servers with SFP+ direct attach and some with 10GbitBaseT Copper Ports on our iSCSI SAN.  Unfortunately the smallest switch I have been able to find with both SFP+ and Copper 10 GbitBaseT Ports is the Nexus 5K Model 5596T which is a bit overkill with 32 10GbitBaseT and 16 SFP+ ports with options for 3 more expansion modules.  Not to mention the price is a little high and it takes up 2 RU which I would prefer 1 RU. Is there any smaller switch available that has both 10 GbitBaseT and SFP+ Ports?  Ideally in 1RU? Jim ... View more

In Cisco Prime Infrastructure 2.2 I have several switches in different locations that give a partial collection failure with the following error: Unable to collect configuration and runtime status of stacked switch. Monitoring of Physical Inventory details Unexpected error. See the log file inventory.log for details. Any idea what could be causing this issue?  My credentials appear ok, but the Prime does not seem to be able to get a full collection including they do not get the current configuration for the archive.  The models I am seeing include 3750's, 2960C's and 3560 switches.  (The strange thing is the error references stacked switches but some of these aren't even stack capable).  Jim ... View more