In MPLS, the criteria for assigning/creating labels for routes/updates does not depend on source(protocol) of that update. MPLS will generate labels for each and every IP prefix presents in the routing table irrespective of its source.
The answer of your second question lies in the question that what IGP can offer which BGP can't offer for running MPLS. FYI, it is mandatory to have IGP running in your network in order to configure MPLS as MPLS has to rely on IGP to construct its label forwarding table. Whereas in general, BGP is required for its ability to deliver routing information between routers that are not directly attached. So the fact is BGP itself somewhat relies on IGP for peer reachability at least at micro-level. So how can you expect MPLS to build its forwarding table from BGP routing table?
But in Inter AS VPN topology we are chaning as well as assigning new label (VPN as well as MPLS labels) of prefiexes so if we change the VPN label then data will be part of other VPN then how both the PE on different ASs will have same VPN?
what will happen is that ,when there is a label assignment in other PE (NNI ) , that ISP cloud will only know about the changed VRF ( Routing Context ) and will reach the destination once it came back to the NNI it will remove the new VRF and wear the old one so that local isp can route that packet.
There is different concept inter AS MPLS like Option A,Option B and Option C,what i have talked is Option A
With XR 4.2.0 the ASR9000 is releasing a new line of hardware models. This amongst others is the RSP440, the next generation RSP with faster switch fabric along with Typhoon based Linecards, the next generation network processor.
The Cisco EPN system incorporates a network architecture designed to consolidate multiples services on a single Multiprotocol Label Switching (MPLS) transport network. This network is designed primarily based on...
Internet security is important with the increasing attacks that are happening every day. Many internet and browsing security solutions exist, but some are not very easy to use or maybe the question is how can I enable them?