Mandatory Enable CEF switching Configure LDP on every label-enabled interface Optional Configure MPLS ID Configure MTU size for labelled packets Configure IP TTL propagation Configure conditional label advertising Config mpls ldp router-id interface [force] router(config-if)# mpls ip …

IP aggregation/sumerisation breaks an LSP into 2 segments Aggregation should not be used where end-to-end LSP’s are required such as witin; MPLS VPNs MPLS TE MPLS enabled ATM network Transit BGP where core routers are not running BGP Label allocatation and distribution in a frame-mode MPLS network …

A label is removed on the router before the last hop within an MPLS domain. PHP optimises MPLS performance (one less LFIB lookup) PHP does not work on ATM (Virtual Path Identifiers/virtual channel identifies cannot be removed) The pop or implicit null label uses a reserved value when being …

OK, so having known about MPLS for a few years and actually get a provided service in my work environment as well as the fact it is on the CCIE R&S blueprint I thought I should get a much better understanding of how it works and the various terminology’s. My notes so far; The benifits of MPLS; …

Root Guard is a mechanism that allows the administrator to control where candidate root bridges can be connected to the network, it will basically prevent the wrong switch (say a random one just added) from becoming the root bridge. If a Rood guard port receives a BPDU that might cause the sender to …

The following tables is the CCIE R&S Blueprint, it is a combination of DOC-4375 and DOC-6864. [table id=15 /]

Unidirectional Link Detection (UDLD) is a Cisco proprietary extension that lives to detect miss-configured and broken links between Cisco switches. It verifies that they can both send and receive data on a point-to-point link. This can be used to assist spanning-tree and compliments things like …

So I have started looking at CCIE study and have been looking around to see what books and useful material exists out there. To begin with this list may be a little messy.I look to have been very lucky in that a number of these books (and more) my Dad actually got for me while he was working for …

To prevent loops that might develop if a port that should be blocking transitions to the forwarding state we have loop guard. This could happen if a port stops receiving BPDUs, maybe due to a unidirectional (on point-to-point) link or software/configuration problem on the neighbour. The following …

The IEEE (Institute of Electrical and Electronics Engineers) is a group that produced standards in many fields and industries. The mission statement; IEEE’s core purpose is to foster technological innovation and excellence for the benefit of humanity. The vision statement; IEEE will be essential to …