CCIE SP OEQ 2

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?

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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