My Personal Blog
Cisco Data Center related stuff.
Cisco changed the UCS Emulator a little bit with the current 2.2.5a and 3.0 mini emulator. There is no config user anymore ! What if you want to have a static ip address for you emulator ? First go the the console Login with : ucspe and use the password ucspe Now you see somekind … Read more
Once I started connecting two commodore 64 with the serial interface. And now we got 100G networks ! Such a wonderful world. Here are just some of the 100G devices/modules that Cisco is selling and it shows that those devices are ready for the future. Nexus 3232C 32x100G in 1U. With 32 QSFP28 ports this … Read more
Today Cisco release the new NX-OS 7.2.0(D1) for the Nexus 7K with some nice features. Before I show the Top 10 of feature, you can download the image via : bit.ly/1RfHxY5 10 : Support for the Nexus 7702 The Nexus 7702 is the new (small) chassis of the Nexus 7K range. See my post bit.ly/1IIDNi6 for more details. … Read more
When I tried to open the Cisco UCS CIMC of the server with firefox I got the error message : Received a malformed Server Key Exchange handshake message. (Error code: sll_error_rx_malformed_server_key_exch) How to solve it ? Just type in firefox : about:config Search for tls and change the value from 3 to 2. Restart Firefox … Read more
Software Defined Networking (SDN), Software Defined Data Centers (SDDC), Software Defined Storage (SDS). A lot of buzz words and is it really something new ? Let’s focus on SDN. What is the problem and what is SDN resolving. More then 15 years ago I was a networking guy. At greenfields I had to deploy sometimes … Read more
Today Cisco announed the new MDS 9396S. It’s a storage switch. Not a leaf switch for ACI like the Cisco 9396PX/9396TX. So please don’t confuse those type of switches. The MDS is for storage en the Nexus 9396 is for network switching. http://www.cisco.com/c/en/us/products/storage-networking/mds-9396s-16g-multilayer-fabric-switch/index.html The new Cisco MDS 9396S is a 16G fixed storage switch with … Read more
Cisco got different kind of Nexus 7k devices. Why a Cisco Nexus 7702 with only one supervisor and the possibility for 1 blade ? In a good Data Center design there are always redundant pairs of devices. So for instance 2x Nexus 7710 as a redundant core. But what if I do have a small … Read more
Right now a lot of Nexus 9K’s are sold by Cisco. Customers are using the NX-OS mode first and then they want to upgrade in the future. But there is a catch ! A Nexus 9K which is a spine, like the 9336PQ, can only run in ACI mode and NOT in NX-OS mode. Every … Read more
I wanted to have a bitnami virtual appliance in my vSphere environment. Of course I was using the documentations and there was : If you want to run on VMware ESX or ESXi you can use the “vmkfstool” command line that you can find in your server host to import/export the machine: $ vmkfstools -i … Read more
Identify iSCSI traffic : class-map type qos class-iscsi match protocol iscsi match cos 4 class-map type queuing class-iscsi match qos-group 4 policy-map type qos iscsi-in-policy class type qos class-fcoe set qos-group 1 class type qos class-iscsi set qos-group 4 policy-map type queuing iscsi-in-policy class type queuing class-iscsi bandwidth percent 10 class type queuing class-fcoe bandwidth … Read more