BGP default route

OSPF area configuration best practices

BGP AS-path prepending

HQF: intra-class WFQ ignores the IP precedence
Continuing my tests of the Hierarchical Queuing Framework, I’ve tested whether the fair queuing works similarly to the previous IOS implementations, where the high-precedence sessions got proportionally more bandwidth.Summary: Fair queuing within HQF ignores IP precedence. Read more in Cisco IOS Hints and Tricks blog

Two Day IPv6 Technical Workshop
We’re running a two day IPv6 technical workshop next week. Its contents are equivalent to the IPv6 Fundamentals course with “a bit” longer days and without the lab exercises. It’s ideal for those that need to understand the IPv6 technology but don’t yet need the hands-on experience.Quick links: Course contents and registration.

Twitter
Finally there's a short explanation of Twitter that I can relate to:

Dual-stack PPP requires two separate sessions?
A while ago a senior Service Provider network designer told me that they have serious issues with IPv6 deployment as IPv6 requires a separate PPPoE session from the CPE devices which significantly increases their licensing costs. The statement really surprised me; PPP was designed to be a multi-protocol environment and it’s very easy to configure IPv4 and IPv6 over a single PPP session in Cisco IOS. I think I might have tracked down the source of this “information” to the 6deploy IPv6 and DSL presentation which states on Page 11 that “Separate PPP sessions are established between the Subscriber’s sy

“ip ospf mtu-ignore” is a dangerous command
Two years ago I wrote about the problems caused by MTU mismatch between OSPF neighbors, and warned that the ip ospf mtu-ignore interface configuration command that supposedly solves the problem could cause significant headaches. Last week’s challenge was a simple illustration of what could happen if you force OSPF neighbors to establish a session even though their interface MTUs don’t match (the very first comment correctly identified the issue).