Some of you may be interested in QSFP+ connections with Cisco Nexus 5500 and Nexus 6000 series switches. The scope of this post is not to present all the different flavors of QSFP+ pluggables or all QSFP+ capable devices but I’ll present some special features that need to be understood and considered when deploying QSFP+ […]
Category: Networking
Originating Default Route in OSPF in Junos
I have a Junos router (Juniper SRX) with the default route pointing to the ISP (IP and default route assigned by DHCP) and a pair of Cisco Nexus switches with OSPF routing between all the boxes. I needed to originate a default route from SRX to Nexus switches. First, in order to be able to […]
Junos authentication-order Configuration
In Cisco IOS you usually configure RADIUS or TACACS+ authentication with local user database as a backup, and you explicitly define the “local” keyword to tell that the local database is used if external servers are not responding. If the external server says “rejected” then the local database is not consulted. In Junos you use […]
Review: Sena Parani-SD1000 Bluetooth Serial Adapter
I have always disliked using serial console connection to a switch or other network device with my laptop. The serial cable just ties me to that particular place and device. Depending on the situation you may have options like using a console server or a dedicated management network connection. But every now and then the […]
Configuring BGP Sessions in IPv6
My colleagues were faced with an IPv6 implementation case where the router IOS feature set prevented them from configuring the BGP sessions. I labbed something for them and thought this overall IPv6 BGP session configuration would be worth of documenting here because there are some differences when compared to the usual IPv4-only BGP configurations. I […]
Cisco Nexus 7000 Features Available on Modules
In the Cisco Nexus 7000 series switches there are several features that are bound to the hardware, meaning that your module selection restricts the features you can run on the switch ports. Thus, here is once again a summarization of the module-dependent features: Update 20-Apr-2013: Added OTV and LISP, clarified M1 FEX support. Update 22-Jul-2013: […]
Cat6500 FEX, or Smart Install?
I was surprised when I got a broschure in Cisco Live London 2013 that said Catalyst 6500 is supposed to support FEXes (Fabric Extenders) in the future. Does it make sense? A FEX is a device that looks like a data center LAN switch but it is not designated as a switch. FEX needs a […]
IOS 15.1SY Product Bulletin and New BFD Features
As a continuation to my previous post about IOS 15.1SY and 12.2SX, here is the product bulletin for IOS 15.1SY (for Sup720 and Sup2T): http://www.cisco.com/en/US/prod/collateral/iosswrel/ps8802/ps11821/ps11846/product_bulletin_c25-717747_ps11845_Products_Bulletin.html It presents the highlights in a different way to the Release Notes. The most interesting new features for me personally are the following: BFD (Bidirectional Forwarding Detection): Static Route Support […]
Juniper SRX100 Junos Upgrade Process
Upgrading Junos on Juniper SRX100: JTAC Recommended Junos Software Versions: http://kb.juniper.net/InfoCenter/index?page=content&id=KB21476&smlogin=true Junos downloads for SRX100: https://www.juniper.net/support/downloads/?p=srx100 Copy the new Junos image in a USB memory stick. Plug the USB stick to SRX100. On SRX100, start the unix shell, check the USB stick device name and mount the stick: admin@srx100> start shell % dmesg … umass1: […]
Catalyst 6500 IOS 15.1SY and 12.2SX
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 […]