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You are told to supply a DSCP value of 46 for an IP SLA Monitor stream of traffic. When you access the IP SLA Monitor configuration mode, you encounter only the following command to enter in the DSCP value:

  R2(config-sla-monitor-jitter)#tos?

<0-255>  Type of Service Value

What is the correct value you need to enter for this IP SLA Monitor stream of traffic to be assigned a DSCP value of 46?

Come back next week to learn the correct answer, or join an NMC Live On-line Group Mentoring session to discuss this topic and many other CCIE related topics.

The VLAN number is “8” because the configurable spanning root bridge priority value on a Cisco Catalyst switch that is closest to 8200 is 8192. When this configurable value of 8192 is subtracted from the supplied value of 8200 in the Question of the Week, the remainder is “8”. This calculation is performed due to the 802.1T structure of the Spanning Tree implementation supported on Cisco Catalyst switches. For more information, see the Cisco 360 Link-Layer Lesson Module or sign up for the NMC Live On-line Group Mentoring sessions that supplement Cisco 360 content.

You are told to assign a group of routers to a common VLAN; and you are not explicitly told what the VLAN number is. However, you are told that the unknown VLAN must possess a root bridge that is assigned bridge priority value of 8200. What is the unknown VLAN number?

Please come back to view the answer on Friday, May 21th.

Question #1: Given the following block of IP prefixes, how many filtering statements (standard access-lists, extended access-lists or prefix-lists)are needed to permit these prefixes and only these prefixes:

• 172.16.20.0/24
• 172.16.21.0/24
• 172.16.22.0/24
• 172.16.23.0/24

Question #2: Given the following block of IP prefixes, how many filtering statements (standard access-lists, extended access-lists or prefix-lists)are needed to permit these prefixes and only these prefixes:

• 172.16.30.0/24
• 172.16.31.0/24
• 172.16.32.0/24
• 172.16.33.0/24

Please note the extreme similarities between the address blocks listed in both Question #1 and Question #2. This similarity generated many surprising results for many of the students in the NetMasterClass Llive On-line Group Mentoring Session. Please come back to view the answer on Friday, May 7th.

What is the recommended DSCP name for the telephony (VoIP) service class according to the appropriate RFCs?

A)  EF
B) AF41
C) DF
D) CS4
E) AF31

The Answer is A) EF

Issue
What DSCP name and value are recommended for VoIP traffic?
Solution
RFC 4594 recommends the Telephony service class use DSCP name EF (Expedited Forwarding). This has a DSCP marking of 101110. Devices should be configured to prioritize traffic with this marking in a low latency queue and should never drop this traffic selectively.
More
(A) RFC 4594
(A) Classifying VoIP Signaling and Media with DSCP for QoS

Question
You want EIGRP to consider load in its metric calculation in your Cisco network infrastructure. What K value do you need to set?

A K1

B K2

C K3

D K4

E K5

————————-

QOW 2 Answer

Issue
Which K value results in load being used in the EIGRP metric calculation?
Solution

Study the formula for the EIGRP metric calculation shown in the more information link. Notice that setting K2 to one would allow load to be part of the metric.

More information: click here

This is the first in our question of the week series:

(click for larger version)

Check back Friday for the answer!

The answer is B - Type 3.

Issue
What type of route is on R10? Why?
Solution
R10 possesses a single OSPF route in this configuration. Because it is part of a Totally Stubby area, this device will possess a single Type 3 Summary LSA. Specifically, this summary is for the default route 0.0.0.0. This default route is generated by the ABR of the area so this router can reach destinations beyond its stub area.

Check back Monday for the new question.

Preparing for the CCIE certification can be an overwhelming experience! One can spend months, even years, preparing only to discover that he or she has been studying in the wrong manner. After attending the Group Mentoring Sessions, you can make a better informed decision regarding what components you want to purchase from the Cisco 360 portfolio.

With NetMasterClass Webinar series you will receive:

1. A 10 page NetMasterClass CCIE Preparation Roadmap using the Cisco 360 content. This roadmap applies the recommended three phase CCIE preparation approach outlined by Cisco 360.
2. A NetMasterClass CCIE Self-Assessment spreadsheet
3. A schedule for the Group Mentoring Sessions you can attend.

The Group Mentoring series is of fifteen 90-minute sessions that are delivered over a 21 week period. Each week a specific topic is covered. Please note that this Group Mentoring series starts every four weeks. Therefore, if you missed one session on one week you have two options: (1) attend the same session in the next iteration of the NMC Group Mentoring Sessions or (2) listen to a recorded version of the specific session . When you attend the NMC Group Mentoring Sessions , do not except to simply be a passive viewer! Your Mentor will be proactively monitoring who is asking questions during each session and will make adjustments for lesson plans according to the activity of a given student. Also, you will be able to e-mail the mentor questions and suggestion for topics to be covered in each Group Mentoring Session.

Topics of the 15 ninety minute session of the NMC CCIE Group Mentoring Sessions:

1. Session #1: CCIE Deep Dive – Gaining Initial Exposure to CCIE Level Problems and CCIE Level Problem Solving Approaches
2. Session #2: Link-Layer – Catalyst 3560 Connectivity Issues
3. Session #3: Link-Layer – Frame-Relay and Point-to-Point Technologies
4. Session #4: Attaining Connectivity Beyond the Link-Layer – OSPF, EIGRP, RIP, Policy Routing and OER/PfR
5. Session #5: Redistribution
6. Session #6: BGP
7. Session #7: STOP!!! CONSOLIDATE AND REVIEW ALL TOPICS DISCUSSED SO FAR – Review all core topics and Re-affirm our single and consistent “options analysis”
8. Session #8: MPLS
9. Session #9: Multicasting
10. Session #10: IPv6
11. Session #11: Router QoS
12. Session #12: Catalyst QoS
13. Session #13: Security
14. Session #14: IP Services Part 1
15. Session #15: IP Services Part 2