Here are some practice OEQs I found. Hope this helps!
CCIE SP OEQ HERE WE GO !
Q1.
Name 3 advantages of running MPLS in a service provider network
Q2.
What are the advantages of the MPLS VPN solution for the service provider over all the other VPN solutions?
Q3.
Name 4 technologies that can be used to carry IP over ATM
Q4.
Name 2 pre-MPLS protocols that use label switching
Q5.
What do the ATM switches need to run so that they can operate MPLS?
Q6.
How do you ensure optimal traffic flow between all the customer sites in an ATM or Frame Relay overlay network?
Q7.
Name the 4 fields that are part of a MPLS label
Q8.
How many labels can reside in a label stack?
Q9.
In which layer does MPLS fit in the OSI reference model?
Q10.
Which table does an LSR use to forward labeled packets?
Q11.
What type of interface in cisco IOS use the DoD label distribution mode and the per-interface label space?
Q12.
Why does the MPLS label have a TTL field?
Q13.
What does the push operation do on a labeled packet?
Q14.
Which cisco IOS command do you use to see what the swapped label is and which labels are pushed onto a received packet for a certain prefic?
Q15.
What does the outgoing label entry of "Aggregate" in the LFIB of a cisco IOS LSR mean?
Q16.
What label value signals the penultimate LSR to use PHP
Q17.
What is the fundamental purpose of LDP?
Q18.
Name 4 main functions that LDP takes care of
Q19.
How can you reduce the number of label bindings on an LSR?
Q20.
What problem does MPLS LDP-IGP synchronization solve?
Q21.
What do you need to configure to protect the LDP sessions against attacks?
Q22.
What does LDP session protection use to protect an LDP session?
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A1.
- BGP free core
- MPLS VPN
- TE
A2.
easy provisioning of sites and optimal traffic flow in the core network
A3.
- RFC 1483
- LANE
- MPOA
- MPLS
A4.
ATM and frame-ralay
A5.
IP routing protocol and LDP
A6.
needing full mesh of VCs
A7.
- label
- exp
- bos
- ttl
A8.
any number you want
A9.
no category of the OSI reference model or layer 2.5
A10.
LFIB
A11.
LC-ATM interfaces
A12.
loop prevention
A13.
pushs one or more labels onto the label stack
A14.
show mpls forwarding-table
A15.
LSR removes the labels and does an IP lookup
A16.
3,the implicit NULL label
A17.
distribute label bindings
A18.
- discovery LDP running LSR
- session establishment
- advertising of label mappings
- housekeeping by means of notification
A19.
controling the advertisement of label bindings via LDP in the outbound direction, or filtering the incoming label bindings
A20.
labeled packets dropping
A21.
MD5 authentication for the LDP neighbor
A22.
targeted LDP session
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Part2 here we go !
Q1.
In what ways is an ATM LSR different from a frame-based LSR?
Q2.
What is the default control vc for LDP?
Q3.
What is the preferred control mode for LDP on the ATM LSRs?
Q4.
Name 2 ways that LDP can detect loops
Q5.
Which label space is used on an LC-ATM interface?
Q6.
Name 2 components of CEF
Q7.
Name the 3 most common packet switching methods in cisco IOS
Q8.
Why does MPLS use CEF?
Q9.
What is the adjacency table used for ?
Q10.
What fields of the IP header does CEF use to load-balance IP packets?
Q11.
What is a RD?
Q12.
How is a packet that is coming from the CE router identified as to which VRF it belongs?
Q13.
What is the purpose of RTs?
Q14.
What is an RR group?
Q15.
What is the BGP neighbor command with as-override used for?
Q16.
What command should you configure on a multi-VRF CE router that is running OSPF?
Q17.
What 3 characteristics does an OSPF sham link have?
Q18.
Why do MPLS VPN packets have 2 MPLS labels?
Q19.
Which BGP extended community can prevent routing loops from occurring in MPLS VPN networks?
---------------------------------------------
A1.
- the label value is encoded in the vpi/vci fields
- atm LSRs forwar cells
- ATM LSRs are not capable of decrementing the TTL
- running DoD mode
A2.
0/32
A3.
OC(ordered control) mode
A4.
hop count TLV and path vector TLV
A5.
per-interface label space
A6.
adjacency table and FIB or CEF table
A7.
process switching, fast switching and CEF switching
A8.
for implementing labeling of incoming ip packets
A9.
taking care of the L2 rewrite of the frames that are switcfhed by the router
A10.
dest ip add, src ip add
A11.
making the vpnv4 route unique
A12.
by the VRF configuration on the interface
A13.
importing vpnv4 routes into the VRF routing table and exporting the vpnv4 routes to VRF sites that accept the RT
A14.
filtering vpnv4 routes
A15.
replacing all occurrences of the AS number of the BGP peer in the as-path with his own AS number
A16.
capability vrf-lite
A17.
- unnumbered
- p2p
- demand-circuit
A18.
P routers use the IGP label to forward the packet to the correct egress PE router.the egress PE router uses the VPN label to forward the IP packet to the correct CE router.
A19.
SOO
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TE quiz, here we go !
Q1.
Name the advanteges of MPLS traffic engineering
Q2.
What are the components of MPLS traffic enginnering?
Q3.
What are the attributes of the links enablefor traffic enginnering?
Q4.
Name the 6 ways how you can forward ip traffic onto a TE tunnel
Q5.
Name 4 kind of path options you can specify
Q6.
When you have an MPLS VPN network and TE tunnels that do not always have the PE routers as head/tail end routers, what do you need to have?
Q7.
What is the LSR that is the head end router of a backup tunnel called?
Q8.
Why do you need a link-state routing protocol for MPLS TE?
Q9.
What is the feature called that has the IGP advertise TE tunnels as links?
Q10.
How does the head end LSR of a TE tunnel knows that the tunnel is fast rerouted over a backup tunnel?
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A1.
- sttering traffic so that all links in the network are used optimally
- routing traffic around hostspots in the network
- fast rerouting traffic around link and node failures
A2.
- OSPF or IS-IS with TE extensions enalbed
- RSVP
- Link attributes
- TE tunnel attributes
A3.
- maximum reservable bandwidth
- attribute flags
- TE metric
A4.
- static route
- policy-based routing
- forwarding adjacency
- autoroute announce
- direct mapping of AToM traffic onto TE tunnels
- CBTS
A5.
- explicit
- explicit with exclude address
- explicit with loose next address
- dynamic
A6.
- LDP enabled on the links
- LDP targeted session on the TE tunnel if the tail end router is a P router
A7.
the point of local repair(PLR)
A8.
to know the attributes and available bandwidth of all links
A9.
forwarding adjacency
A10.
receiving a PathErr message from the PLR, indicating that local repair is active
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SP QoS quiz 4
Q1.
How many bits in the IP header can be used for QoS?
Q2.
How many AF classes exits?
Q3.
Name the 3 MPLS DffServ models
Q4.
What it the difference between the Pipe and Short Pipe models?
Q5.
What is the interface command to encapsulate all IP packets with an explicit NULL label?
Q6.
What is TOS reflection?
Q7.
What feature is used in Cisco IOS to alter the EXP bits?
Q8.
What is the problem with PHP and QoS?
Q9.
What is the solution to the problem in quesion 8?
Q10.
On which labels can you change the EXP bits value?
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A1.
3 bits for IP precedence or 6 bits for DSCP
A2.
4
A3.
Uniform model, Pipe model and Short pipe model
A4.
Pipe model using the LSP DiffServ information to forward packets on egress LSR
Short pipe model useing the Tunnel DiffServ information to forward packets on egress LSR
A5.
mpls ip encapsulate explicit-null
A6.
The default behavior of copying the precedence value of an IP packet to the EXP bits of all imposed labels
A7.
MQC
A8.
the EXP bits value is not copied to the newly exposed MPLS label or precedence/DiffServ bits in the IP header, if the packet becomes unlabeled
A9.
explicit NULL label or qos-group
A10.
the top label and the pushed label