Cisco CCIE Service Provider DSL Set 12

1.

The ATM Transmission Convergence Sublayer is NOT responsible for:

Cell delineation Header error control sequence generation and verification Cell rate decoupling Transmission frame adaptation Fast ReRoute

2.

The following configuration is entered on an ATM interface:interface atm 0/0/0encapsulation aal5mux ppp virtual-template 1interface atm 0/0/0.10 multipointpvc 0/100exitpvc
0/101encapsulation aal5snapWhat will the encapsulation type for the PVCs be?

PVC 0/100 will have encapsulation type MUX PPP, and PVC 0/101 will have encapsulation type SNAP. Both PVC 0/100 and PVC 0/101 will have encapsulation type MUX PPP. PVC 0/100 will have encapsulation type UNDEFINED, and PVC 0/101 will have encapsulation type SNAP. Both PVC 0/100 and PVC 0/101 will have encapsulation type SNAP. The above configuration is invalid.

3.

What VCI value is reserved for PNNI ATM routing?

5 16 18 22 31

4.

Find the problem in the following configuration:vpdn enablevpdn-group 1request-dialinprotocol pppoevirtual- template 2!interface atm 2/0.1 point-to-pointpvc 0/101encapsulation aal5snapprotocol pppoe!interface atm
2/0.2 point-to-pointpvc 0/102encapsulation aal5snapprotocol pppoe!interface atm 2/0.3 point-to-pointpvc
0/103encapsulation aal5snapprotocol pppoe!interface virtual-template 2ip unnumbered Fastethernet
4/0!interface FastEthernet 4/0ip address 172.22.32.1 255.255.255.0

The ATM subinterfaces cannot be defined point to point. The encapsulation on the PVCs should be aal5mux. The VPDN-group definition should have the command 'accept-dialin' instead of the command 'request-dialin'. A static IP address should be configured on the virtual template. The virtual template number should be the same as the VPDN-group number.

5.

Routers E and F are configured for HSRP (Hot Standby Routing Protocol). E has a priority of 100, while F has a priority of 50. At one point, when E is the active router, it fails, and F takes over as the active router. A few minutes later, E returns to service. What happens?

F will remain the active router; there is no way for E to become the active router again unless F fails. E and F will negotiate which router should be active based on their IP addresses. E will always take over the active role; there is no way for F to remain active once another router with ahigher priority is on the network. E will become the active router, if it is configured to preempt. F will remain the active router because having a lower priority is better.

6.

A router is receiving updates for a subnet from different routing protocols. The administrator wishes to take advantage of a path via a route with a less favorable Administrative Distance. What can be done to effect this
without losing any of the updates?

Configure a static route with an Administrative Distance of 120 Use the Router Configuration mode command distance with an appropriate 'weight' for this subnet Create a distribute-list to block this subnet Modify the default-metric weight of the routing protocol offering the more favorable Administrative Distance

7.

In BGP, why should a Route Reflector be used?

To overcome issues of split-horizon within BGP To reduce the number of External BGP peers by allowing updates to reflect without the need to be fullymeshed To allow the router to reflect updates from one Internal BGP speaker to another without the need to be fullymeshed To divide Autonomous Systems into mini-Autonomous Systems, allowing the reduction in the number ofpeers None of the above

8.

Using the above diagram, which are valid BGP AS_Path Attributes received at Net1 for a route originating from AS65100? (multiple answer)

200 57000 100 65100 200 57000 100 100 100 57000 200 200 57000 100 65100 100 57000 200

9.

According to the diagram, what attribute is initiated by AS200 (IBGP) to give preference to the path A or D traffic will take when going from AS200 to AS100? What attribute is
initiated by AS200 (EBGP) to give preference to the path B or C traffic will take when going from AS100 to AS200?

MED; Origin MED; Local Preference Community; Origin Local Preference; MED Origin; Community

10.

BGP can implement a policy of 'Route Dampening' to control route instability. What statement about route dampening is NOT correct?

A numeric penalty is applied to a route each time it flaps. The penalty is exponentially decayed according to parameters, such as half-life-time. The history of unstable routes is forwarded back to the sender to control future updates. The route is eventually suppressed based on a configurable 'suppress limit'.

Cisco CCIE Service Provider DSL Set 12

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