After I’ve completely illustrated the Inter-AS MPLS VPN solution with all its options, I’ve decided to cover the Carrier Supporting Carrier with all its options as well. It was described as Carriers’ Carriers in draft-ietf-2547bis section 9 and followed in the final RFC 4364, and was named Carrier Supporting Carrier by Cisco, and Carrier of [...]
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- BGP performance tuning - Convergence, Stability, Scalability and NSF (Part 1)
- LDP neighbor discovery, session establishment and maintenance
- CEF and load sharing
- Carrier Supporting Carrier - The whole story (1)
- IS-IS and fast convergence ongoing tricks
- OSPF RID Story
- MTU and ping size confusion
- The endless story of OSPF vs IS-IS
- The ip route-cache command - Bury the hatchet series
- Draft Martini, Draft Kompella and L2VPN services
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Carrier Supporting Carrier – The whole story (1)
December 28th, 2008 mmahmoud Posted in Bury the hatchet, MPLS No Comments »
Inter-AS MPLS VPN – The whole story – Updated Dec 2008
December 25th, 2008 mmahmoud Posted in Bury the hatchet, MPLS 1 Comment »
While doing the final preparations for my CCIE SP track written exam, I reviewed my Inter-AS MPLS VPN posts and I found out that they needed some modifications to be more organized and comprehensive, please revisit the updated posts: Inter-AS MPLS VPN – The whole story (1) Option 1(10A): Back-to-Back VRF – Inter-AS MPLS VPN [...]
BGP performance tuning – Convergence, Stability, Scalability and NSF (Part 2)
December 17th, 2008 mmahmoud Posted in BGP, Bury the hatchet 3 Comments »
As we agreed in the last post, we are going to discuss the available tools and parameters for BGP performance tuning. In this post we are going to start discussing the different types of timers that BGP uses for its operation.
BGP performance tuning – Convergence, Stability, Scalability and NSF (Part 1)
December 5th, 2008 mmahmoud Posted in BGP, Bury the hatchet, Network Design, Routing No Comments »
It is a very critical matter for a network architect (the same goes for a network operator but with a different prospective) to understand the inside out of tuning the routing protocols performance, in order to be able to conduct an appealing and effective low level design for small to large scale networks. We have [...]
Cisco and Nonstop Forwarding
November 21st, 2008 mmahmoud Posted in Bury the hatchet 1 Comment »
Nonstop Forwarding is a feature of many features in the Cisco High Availability portfolio, we shall be covering most of it later. To check Cisco High Availability portfolio: http://www.cisco.com/en/US/products/ps6550/products_ios_technology_home.html Use Cisco Feature Navigator to find information about platform support and software image support: http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp Cisco Nonstop Forwarding (NSF – AKA Graceful Restart) with Stateful Switchover [...]
Option AB – Inter-AS MPLS VPN – The whole story (5) – Updated Dec 2008
November 20th, 2008 mmahmoud Posted in Bridging & Switching, Bury the hatchet, MPLS, Routing 3 Comments »
In late 2007, Cisco introduced a new Inter-AS option; Option AB – This feature was introduced in the 12.2(33)SRC code. This feature combines the the best aspects of Option 1 (10A) and Option 2 (10B) (named type a and type b as per RFC4364 section 10 “Multi-AS Backbone”). Remember that type a (Option 1 AKA [...]
