Cisco CCIE Service Provider Cable Recertification Set 10

1.

In the "show cable flap-list" what issues can causes a flap to be incremented? (multiple answer)

"hit" followed by a "miss" Modem keeps trying to quickly reregister Cable modem goes offline After six consecutive misses "miss" followed by a "hit"

2.

When doing a show cable modem it is observed that a few modems are displaying the online(d) state. Users are complaining that they cannot surf the internet. One possible cause is that:

The policy has a misconfigured default gateway. The modem sends a DHCP discover but never receives the DHCP offer unicast back from the server. The modem has network access disabled in the config file. The policy for the CPE pool points to an invalid DNS server. Routing between the provisioning server and the CMTS is broken.

3.

How can decreasing the interleave-depth value effect performance?

It increase the time to transmit a packet. It decreases the upstream transmission rate. It reduces the time needed to transmit a packet. It increases the downstream transmission rate. It increases the time between transmission of a MAP packet

4.

An ISP complains that users are changing their QOS profiles to faster rates than they are paying for. What command would provide the most effective solution?

cable source verify shared secret no cable qos permission modem no cable qos profile create no cable qos profile update

5.

The "show controllers cable x/y upstreram x" command does not detect impulse noise because:

It does measure impulse noise but it is an estimate. Ingress is measured in microseconds and can't be detected. Ingress is measured in milliseconds and can't be detected. Impulse is measured in microseconds and can't be detected. Impulse noise is detected but based on an average.

6.

What command on the Ubr7246 can help find the possibility of a problem with ingress noise on cable x/y upstream? (multiple answer)

Show controller cable x/y upstream z Debug cable mac log verbose Debug cable modulation Show cable hop Show int cable x/y upstream z

7.

What would be the best method for determining the cause of CPEs not getting provisioned an address?

Turn on "debug ip dhcp" in the uBR for all DHCP requests At the failing modem issue the command "debug cable mac log" Check the uBR's system log for errors Make sure the MAC address is populated within client-class-processing Monitor the DHCP log file in CNR

8.

PCRs are located where in an MPEG packet?

Transport Packet Header Adaptation Field Sync byte Payload Transport Private data

9.

Interlaced fields are separated by:

1/60 sec 1/30 sec 1/25 sec 1/15 sec

10.

The CLI command "show cable hop":(multiple answer)

Indicates corrected and uncorrected errors in the upstream. Indicates power level and upstream SNR. Identifies the upstream receiver port that is supporting the modems causing customer service calls. Indicates that cable modem is at maximum power level. Identifies manufacturer of the cable modem, and associated MAC address.

Cisco CCIE Service Provider Cable Recertification Set 10

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Cisco CCIE Service Provider Cable Recertification Set 10

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