1 What is VPLS?
2 Describe the roles of RD and RT in MPLS L3VPN?
3 What are LIB?
4 What is LFIB?
5 What is MPLS-TP?
6 What is downstream and upstream router in MPLS? Difference between MPLS and MPLS-TP?
7 How does LDP Initializes?
8 What is Cell Mode MPLS over ATM?
9 Difference Between VC Based Multiplexing And Logical Link Control Encapsulation in ATM?
10 Basics of ATM?
11 ATM is packet or circuit switching?
12 Is LDP Required for VPNv4 Labels?
13 How can you differentiate VPNv4 and IPv4 address-family?
14 Is it possible to assign the same RD to multiple customers?
15 What are the benefits of using MPLS?
16 What is transport address?
17 What is MP-iBGP?
18 Differences between MPLS and VPN?
19 What are the prerequisites to run MPLS?
20 Which Routing protocols support MPLS Traffic Engineering?
21 If we disable CEF will MPLS work?
22 What is different between VRF and VRF Lite?
23 Can we implement a class of service with MPLS?
24 What is the difference between the P and PE router in terms of MPLS?
25 Two routers are having 4 equal-cost links, how many LDP sessions will be established?
26 Without router reflector can I implement MPLS?
27 What do you mean by MPLS?
28 What is the difference between MPLS and Leased Line?
29 Explain PHP in MPLS?
30 Describe PUSH in relation to MPLS?
31 What is the difference between MPLS LDP and RSVP?
32 Describe SWAP in relation to MPLS?
33 POP function in MPLS?
34 What is a label?
35 What is the structure of the label?
36 Where will the label be imposed in a packet?
37 What is a Forwarding Equivalence Class (FEC)?
38 Name the major roles of MPLS routers?
39 What is the Label Edge Router (LER)?
40 What is the label switch router (LSR)?
41 Can an LSR receive/transmit a labelled packet on a non-MPLS interface?
42 What platforms and Cisco IOS support MPLS?
43 How much overhead does an MPLS LSP tunnel have?
44 How does the LSR know which is the top label, bottom label, and a middle label of the label stack?
45 What is the range of label values?
46 What label values are reserved? What do the reserved values signify?
47 How many bits in an MPLS label?
48 To what multicast address are LDP hellos sent?
49 On what UDP port is LDP sent?
50 What is the difference between the FIB and the LFIB?
51 What options are available for load balancing MPLS packets?
52 Can we configure an 802.1Q trunk between two Cisco Catalyst switches on different sites over an MPLS connection?
53 Does the DHCP relay function work in MPLS VPN Network?
54 What protocol and port numbers do LDP and TDP use to distribute labels to LDP/TDP peers?
55 What is the difference between RD and RT?
56 What is CEF and without enabling CEF, can we make MPLS work?
57 What are the default timers of LDP?
58 Does MPLS support IPv6?
59 How is VPLS different from MPLS?
60 With MPLS VPN-aware NAT, what additional information is tracked inside the NAT translation table?
61 What is the difference between VPN and MPLS?
62 What is a Label Switch Path?
63 What is the Label Distribution Protocol?
64 What’s the difference between CR-LDP and RSVP-TE?
65 What is the relationship between MPLS and the Interior Routing Protocol?
66 What other protocols does MPLS support besides IP?
67 What differences are there in running MPLS in OSPF versus IS-IS environments?
68 Which router performs the PHP function?
69 Label 3 routing protocols and label exchange protocols exist at which MPLS plane?
70 What are the different types of labels?
71 Does RD travel in route update?
72 In neighbor discovery command, I am receiving the only xmit, what does it mean?
73 My LDP router id, OSPF router-id and BGP router-id is different, will it work to forward the traffic of customers or not?
74 What is the default range of MPLS labels in Cisco routers?
75 What group is responsible for creating MPLS standards?
76 What are the components of MPLS-TE?
77 What is “GMPLS”?
78 Can I make my PE router as P?
79 What are the requirements to run MPLS Traffic Engineering in the network?
80 How to filter MPLS labels?
81 What is MPLS?
82 Why MPLS is called as Multi-Protocol Label Switching?
83 Why MPLS is called as Layer 2.5 Technology?
84 What are the applications of MPLS?
85 What are the advantages of MPLS?
86 What is LDP?
87 What is MPLS and why it is being so popular in short time?
88 What is the protocol used by MPLS?
89 MPLS works on which layer?
90 What is the difference between P and PE router?
91 Can I make my PE router as P?
92 Two routers are having 4 equal cost links, how many LDP sessions will be established?
93 My LDP router id, OSPF router id and BGP router id is different, will it work to forward the traffic of customers or not?
94 What is Penultimate Hop Popping and why it is required? Which router performs the PHP function?
95 I am receiving aggregate label, what does it mean?
96 What are the different types of labels?
97 How to make customer route unique?
98 What is the difference between RD and RT?
99 Can I assign a same RD to two different customers?
100 Is RD travels in route update?
101 My customer is having three branches and all are attached to three different PEs, In this case can I use the different VRF names?
102 What is downstream on demand?
103 How to filter MPLS labels?
104 What is the default range of MPLS labels in Cisco routers? How to extend that range?
105 Without route reflector can I implement MPLS?
106 What is the difference between VPNv4 and IPv4 address family?
107 What is MP-iBGP? Can we use normal BGP in lieu of MP-iBGP?
108 What is LIB, LFIB?
109 What is CEF and without enabling CEF, can we make MPLS work?
110 I am receiving end to end customer routes on various PE but not able to ping those routes, what’s could be the problem?
111 What is explicit null and implicit null?
112 Default timers of LDP?
113 Does LDP require OSPF, IS-IS or BGP?
114 In neighbor discovery command, I am receiving only xmit, what does it mean
115 What is transport address?
116 What is the RFC of MPLS?
117 Why MPLS is called multi-protocol?
118 What is the difference between MPLS, SSL and IPSec?
119 I am using different vendor products and want to implement TDP, what type of challenges will you face?
120 What is the MFA Forum?
121 What MPLS related mailing lists are there and what are they used for?
122 How did MPLS evolve?
123 What problems does MPLS solve?
124 What is the status of the MPLS standard?
125 What is a Label?
126 What is a Label Switch Path?
127 What is a Label Distribution Protocol?
128 What’s the difference between CR-LDP and RSVP-TE
129 What is a “Forwarding Equivalency Class”?
130 How are Label Switch Paths built?
131 What other protocols does MPLS support besides IP?
132 What are the differences between MPLS and ATM?
133 Does MPLS replace ATM?
134 What is “Ships in the night”?
135 What does MPLS traffic engineering accomplish?
136 What are the components of MPLS-TE?
137 How does MPLS merge traffic flows?
138 How loops are prevented in MPLS networks?
139 How does MPLS perform failure recovery?
140 What differences are there in running MPLS in OSPF versus IS-IS environments
141 Can there be two or more Autonomous Systems within the same MPLS domain?
142 How does MPLS enable VPNs?
143 What alternatives are there for implementing VPNs over MPLS?
144 What is the “Martini Draft’?
145 What is a “Layer 2 VPN”?
146 What is a Virtual Private LAN Service (VPLS)?
147 Are MPLS-VPNs secure?
148 What kinds of QoS protocols does MPLS support?
149 How do I integrate MPLS and DiffServ?
150 How do I integrate MPLS and ATM QoS?
151 What is “Generalized MPLS” or “GMPLS”
152 What are the components of GMPLS?
153 What are the features of GMPLS?
154 What are the “Peer” and “Overlay” models?
155 What is the “Optical Internetworking Forum”?
156 Can voice and video traffic be natively encapsulated into MPLS?
157 How are MPLS networks managed?
158 Are there any MPLS-specific MIBs?
159 Is there open source MPLS code to test MPLS?
160 What shows and conferences provide information on MPLS?
161 Are there any labs that are performing MPLS interoperability testing?
162 Does MPLS support IPv6?
163 Can I use the existing IPv4 MPLS backbone for IPv6?
164 Define various troubleshooting commands in MPLS?
165 What is adjacency table?
166 Difference between MPLS IP and MPLS Label Protocol LDP command?
167 If MPLS get disable, will it harm my IGP or IPv4 traffic?
168 What will happen if you see your PE loopback in vpnv4 table?
169 What is Bidirectional Forwarding Detection?
170 Different types of Pseudo Wire?
171 Modes of EoMPLS (Ethernet over MPLS)
172 What is L2VPN over Metro Ethernet?
173 What is E-VPN (Ethernet VPN)?
174 What is FEC in traditional IP routing and MPLS?
175 How does CEF understand overlapping of ip addresses?
176 What is the difference between Optimum, Fast and CEF Switching?
177 Define CEF FIB table entries.
178 What is the port number used by LDP?
179 What is penultimate hop popping?
180 What are the functions done by MPLS?
181 What is the difference between Per Platform Label Space and Per Interface Label Space?
182 Is summarization is recommended in MPLS?
183 What is TTL Propagation in MPLS?
184 What is LDP IGP Synchronization?
185 What is the difference between Implicit Null and Explicit Null?
