Syed Natif Nawaz (CCIE No. 8825) has 7+ years' experience in networking design, including five years' experience with Cisco IOS-XR software. As IOS-XR Software Development Manager at Cisco, he is responsible for IOS and IOS-XR defect resolution, feature integration, release processes, and serviceability guidelines. Muhammad Waris Sagheer, Senior Software Engineer in Cisco's High End Routing Organization, specializes in advanced MPLS technologies. He provides MPLS and ATM design, consulting, and escalation assistance to service providers worldwide. He co-authored the case studies in the Cisco Press book MPLS Configuration on Cisco IOS Software. Shahzad Burney is a Software Engineer at Cisco.