Feel free to bash on Catalyst 6500 based on this post as well, I know there are plenty of you who like to complain about this old work horse 
On the other hand, there are also plenty of us who run existing installations and designs and still see Cat6500 routing in the network very […]
Category: Networking
Juniper SRX100 Traceoptions Performance
I have a 50Mbit Internet connection here at home and I’m having a Juniper SRX100 routing it. I just noted that I did not remember to remove the traceoptions configuration and it was affecting the performance on the SRX100. Here is the quick summary and comparison: With the following traceoptions: [edit] admin@srx100# show security flow […]
NX-OS Releases and Platforms
The Cisco NX-OS releases for different platforms are identified interestingly. Let’s start with the mother of all NX-OS releases: x.y(z) = for Nexus 7000 Here x is the major release or software train, y is the minor release and z is the maintenance release. An example of the version number is 5.2(5). See Cisco NX-OS […]
Configuring vPC to Suspend Orphan Ports
As you should know (simplified rule): Whenever the vPC peer link goes down the vPC secondary switch brings down all its connected vPC ports, assuming those vPCs are up in the vPC primary switch. This means that if you have non-vPC-connected hosts on your vPC secondary switch then those ports are left up and traffic […]
MST and Private VLAN Synchronize
A small example about the “private-vlan synchronize” command in MST configuration mode (vlan 100 = primary VLAN, vlan 101 = secondary (isolated) VLAN): n5k-1(config-mst)# show Pending MST Configuration Name [test] Revision 0 Instances configured 3 Instance Vlans mapped ——– ——————————————————————— 0 1000-4094 1 1-100 2 101-999 ——————————————————————————- These secondary vlans are not mapped to the […]
Private VLANs on Nexus 5000 Series
So it was a usual day in the wonderful world of networking and projects. Then I was suddenly lost in the Private VLANs. You know, the feature that has existed a long time in Cisco switches but still there are some known and unknown limitations in using it. Let’s talk about PVLANs. First the basics […]
Importing Configuration in the Switch Profile
In an earlier post (Dual-Homed FEXes and Switch Profiles) I wrote about the switch profiles and how to use them to configure dual-homed FEXes. I mentioned that it is possible to import existing configurations into the switch profiles. Now I was really attempting it in practice. When importing configurations I constantly struck myself to the […]
Nexus 5000 and Nexus 2000 Series Twinax Cables Certification Matrix
If you are going to use Twinax cables with your Nexus 5000 series switches or Nexus 2000 series FEXes you can check the certification matrix here: http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps10110/data_sheet_c78-568589_ps9670_Products_Data_Sheet.html As a bonus sector, data sheet for the 10G SFP+ modules is found in http://www.cisco.com/en/US/prod/collateral/modules/ps5455/data_sheet_c78-455693.html.
Life of a Change
I’ve been quite busy doing “stuff” the whole winter. Here is one piece of “stuff”: Life of a Change. T minus 7 weeks I created the Change Request (CR). It was based on the discussion we had had with the customer and a service provider about developing the customer connections of the SP. During the […]
majornetwork.net Is Now IPv6-Enabled
Majornetwork.net is now IPv6-enabled! I just forgot to ask for the AAAA record from my provider. Don’t always think that everything has to be hard! I also included an IPv4/IPv6 connection status display for visitors on the right side. More information about the World IPv6 Launch Day (6-Jun-2012): http://www.worldipv6launch.org/