The Internet routing table size has continued to grow steadily. In 2008 we reached 256K routes and now the table has exceed 512K Routes. This is of significance for customers running some of the older PFC3 based Supervisor 720 engines on the 6500 and 7600 switches.
On the Catalyst 6500 and 7600 Series platforms, all of the routing information is stored in special high-speed memory called TCAM. Read More »
Written by Omar Santos, Incident Manager, Cisco Product Security Incident Response Team (PSIRT) Security Research and Operations
Since the early 1990s, we’ve watched as the number of entries on the Internet routing table has steadily grown. In 2008 the table reached 256,000 routes, triggering action by network administrators to ensure the continued growth of the Internet. Today we know that another significant milestone has been reached, as we officially passed the 512,000 or 512k route mark!
Our industry has known this milestone was approaching for some time. In fact it was as recently as May 2014 that we provided our customers with a reminder of the milestone, the implications for some Cisco products, and advice on appropriate workarounds.
I’ve always been curious about networks. I remember opening up an old Linksys Router and discovering the physical circuit, the processor and integrated memory.
But my official networking life didn’t start until my coworker taught me the basics of routing. The first thing I learned was how to log in and enter commands within the command line. The second was CRC errors. These small lessons peaked my interest and by the following week I was digging in and researching how the devices worked. The first Cisco device I had the pleasure to meet was a Catalyst 6500.
I had no idea what I was doing, but I was eager to learn. Software verses firmware, “.bin”’ extensions, encapsulation, connections from LAN to WAN, wiring. The more I researched, the more I liked it and realized this was what I really wanted to do. Read More »
Cisco Instant Access is a concept that was launched at Cisco Live Orlando last year. For those of you familiar with the Nexus product line, think Fabric Extender (FEX). The first customers are starting to implement this concept now. The whole point of Instant Access is explained with the picture below.
To the left is the traditional network with multiple access switches located in closets, uplinked to the distribution layer or straight to the core in a collapsed core design. Every access switch is a point of management which needs configuration, software maintenance and feature compatibility with other access switches. Read More »
I am pleased to announce that Catalyst 6807-XL and 6880-X are shipping now! Launched at Cisco Live Orlando this year, Cisco Catalyst 6800 Series Switches are programmable campus backbone switches optimized for 10/40/100 Gigabit Ethernet services. They are built for rich 10/40/100G services for BYOD & collaboration, support programmability and simplicity, and have the DNA of Catalyst 6500.
Catalyst 6807-XL is a modular seven-slot switch with up to 880 gigs per slot and 11.4 terabits per second of switching capacity. Catalyst 6880-X is an 80 x 1/10G portsswitch in compact form factor with advanced campus services. Catalyst 6800ia is a stackable access switch built for Catalyst Instant Access that started shipping in October.