Server Networking

We recently began testing VMware ESXi 5.0 on our production network.  After observing some heavy discards (3-10 million at times) on the 10G uplinks FROM our core 6509s TO the Nexus 5Ks we began some investigation.  We started by capturing traffic on...

I have the VSG setup and really like it and trying to sell it to my boss. He wants to know why we should use the VSG and not vShield App? I know that you don't need a service vm on each host, but aside from that I can't really explain anything that w...

Hi,I’m running vCenter 4.1 and Nexus 1000v and about 30 ESX Hosts.I’m using one system uplink port profile for all 30 ESX Host; On each of the ESX host I have 2 NICs going to a Catalyst 3750 switch stack (Switch A), and another 2 NICs going to anothe...

Hello,I have configured enhanced vPC on 2 n5k and B22 FEXs (vPC from 5k to B22, and vPC from B22 to blade servers).Everything is running smoothly, except when I power off one of the 5k, the connectivity to the blade servers is lost, comes back up for...

I am having an issue which i think is arp related. When I am running my 5548's in Active/Active HSRP, I see some hosts (via tracert) are hitting the individual IP of one as oppose to the other, so when I shut one down I have, guessing, half of my cli...

Does anyone know the difference between and have tech specs for...UCS-SD100G0KA2-G and UCS-SD100G0KA2-EBoth are 100GB SSD drives.The  UCS-SD100G0KA2-G is a 100GB SSD Enterprise Value Drive US List is $979 Is this a MLC drive The UCS-SD100G0KA2-E is a...

Typically, an ESX host is connected to a switch port that is    configured as a trunk. The reason, of course, is that an ESX host has  a   bunch of VMs on different VLANs and therefore the hyspervisor tags  the   frames...and you know the rest...In a...

Hi,I currently have Nexus 1000v and vSphere 5.1 and want to convert my port-channel uplink port (ESX to Catalyst 3750 stack) from static to LACP; The configs below are what I have now, and I added in BOLD what I think I need to change on both my VSM ...

Hello,I'm currently designing a new datacenter core environment. In this case there are also nexus 5548 with FEXs involved. On this fex's there are some servers which speak NFS and iSCSI.While changing the core component there will be a disruption be...

Hi there,I have the following Data Center infrastructure:Cisco Nexus 7009 - 6.1.(1)Cisco Nexus 5548 - 5.1(3)N2(1)Cisco Nexus 5020 - 5.0(3)N2(1)Due to desired design, I need to confirm if these are VTP v3 capable or not. So far all switches/nx-os seem...

Hello,When we list the available features for each license package on the cisco nexus licensing guide (page 5)http://www.cisco.com/en/US/docs/switches/datacenter/sw/nx-os/licensing/guide/b_Cisco_NX-OS_Licensing_Guide.pdfThe  N55-BAS1K9 provide unresi...