![]() ![]() Without route reflector can I implement MPLS?Ģ1. What is the default range of MPLS labels in Cisco routers? How to extend that range?Ģ0. Upstream router is the one which advertise the labels to its downstream router after receiving label bindings from it.ġ9. My customer is having three branches and all are attached to three different PEs, In this case can I use the different vrf names?ĭownstream router is the one which is responsible to advertise the label first to upstream router in case of downstream on demand method is selected. Can I assign a same RD to two different customers?ġ6. RD is not an extended community where as RT is an extended community.ġ4. What is the difference between RD and RT? ![]() Implicit Null, Explicit Null, Aggregate Label etc.,ġ3. Second last router performs the Penultimate Hop Popping function to remove the top most label.ġ1. What is Penultimate Hop Popping and why it is required? Which router performs the PHP function? If labels are generated for each and every route then no problem at all.ĩ. LDP router id and BGP router-id should be same if SP is using labels only for loopbacks. My LDP router id, OSPF router id and BGP router id is different, will it work to forward the traffic of customers or not? Two routers are having 4 equal cost links, how many ldp sessions will be established?Ĩ. ![]() To make your PE router as P, you need to remove the BGP configurations and after that it will not participate with customer network.ħ. Another reason is P router doesn’t require MP-iBGP but for PE it is must. P router doesn’t have Customer network routes where in PE router is having customer network routes. What is the difference between P and PE router? It is popular because it must be used for CPN (Converge Packet Network).ĥ. MPLS is multi protocol label switching mechanism which uses the label to forward the traffic to the next hop address. What is MPLS and why it is being so popular in short time? ![]() But in case of MPLS VPN, by default CPE works in full mesh form because of route target.Ģ. In that if you want a full mesh than administrator need to setup n*n-1 tunnels. VPN is generally Virtual Private Network which could be configured by using GRE tunnels. What is the difference between VPN and MPLS? ![]()
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