Miscellaneous Questions

IP services – 2
IPV6 Questions – 7
Multicase Questions – 6
Drag & Drop questions – 1
Qos question – 11
qos question2 – 1
voice questions – 5
Ip routing – 3
mpsl questions – 5
security question – 3
acl questions – 2
switching basics – 9
stp – 10
stp2 – 8
vlan & VTP queston – 4
OSPF – 7
EIGRP – 5
BGP – 7
miscellaneous – 3

Totally – 110 q&ans thanks a lot for explanation

Question 6 i think is incorrect – surely the answer is D.. If you have multiple DHCP pools on a router then clients broadcasting a DHCP “Discover” will be “offered” based in a round robin fashion by each scope if they were all coming through the same router interface. Thus no control of what addresses are being dished out and to whom.

If an ip-helper is configured on each vlan interface (or Sub interface on the router on a stick) then the hosts belong to that vlan would recieve the correct DHCP address.

Also never heard of a “host” command except “ip host” or “switchport host”

Just foudn the DHCP “host” command, but it still does ot explai the question as it can only be used once for each DHCP pool..

I think q 6 may be more a process of elimination between host and helper as which is more wrong.

I think helper will have little effect in selection of the correct pool on the router. If you direct it to the router it is configured on it will do nothing more than if you did not put the helper in. It will still select the pool based on the ip. If you send it to another router all it does is cause it to completely ignore the pools, it would easier to delete them. Now if you have multiple DHCP pools and multiple interfaces then why would that be a problem and it will work without a helper.

Using Host actually makes the “problem” of DHCP pools worse. You would put in one pool for each host you wanted to assign a static ip to. Although they are called pools it is a single ip.

The only way I could see you would even need a second pool would be if you did something like assign a secondary IP but wanted to control assignment.

I am going to guess the answer is host mostly because it does more than just ignore the “problem”

Bill, thaks for the reply — I agree with you, I think the question is so bad that its a toss up between the two “related” commands.. and I suppose its pure guess work as to what the “problem ” actually is ? anyway I got the exam in a few weeks so I might be able to post better wording if I get this question. I think I will go with “host”

Q6
After thinking some more on this it may be the simple answer that they want. The way the server works is to compare the ip address of the interface the request came in on to the NETWORK statement within the DHCP pool configuration to select the pool to use. I guess I am hung up on the word problem.

Bill, this would negate the word “problem” from the question as you are correct that the network statement would match the inbound interface subnet.

I think that if the router had only a single inbound interface and mulitple DHCP pools for different networks then the issue comes where the you have to put the ip-helper onto the vlans / subnets remotely to select the source and change the Broadcast to unicast before it arrives a the DHCP router.

I hae a similar thing where I work ad this is how we deal with DHCP servers with multiple scopes on them.

Q6
In O’reilly Cisco IOS Cookbook on page 862 it says “In particular, you must assign a separate dhcp pool for each static server. In our example, we created a pool named IAN to allocate a static IP address to user Ian. Also, instead of defining a network range of IP addresses, you assign a specific IP address USING THE HOST COMMAND.”

on page 861:
config#ip dhcp pool IAN
dhcp-config#host 172.25.1.33 255.255.255.0

Host command is mainly used to assign a particular IP for a particular client, binding the MAC of client to the IP that need to be assigned.
config#ip dhcp pool IAN
dhcp-config#host 172.25.1.33 255.255.255.0
dhcp-config#hardware-address

But wonder how it is going to solve the issue with multiple DHCP pools?

Q6. Read bad question…
I think the scenario would be you have two DHCP pools, one pool A and one pool B. They both have the same network space 192.168.1.0/24, pool A uses the first 128 address and the pool B uses the remaining address. For some reason you want pool B maybe pointing to different DNS server, so you have two pools. But the interface they are serving is Fas 0/0 and its IP 192.168.1.1/24 so both pools are going to be used. (trying to read a lot into these great one line problems). So in this case you would need a manual binding for each pool. IP Helper isn’t going to do anything but forward the packet (turn from a broadcast to unicast), since the pools local this would not apply, answer D is wrong. The network statements are different, but which pool is my host going to use (maybe this is the problem)? So I have issues with choosing C. Changing the default gateways wouldn’t resolve a “POOL issue”, so answer B is wrong.
You could do a manual binding to the appropriate pool.
To configure a manual binding, first create a host pool, then specify the IP address of the client and client identifier or hardware address. Keyword ‘Host’ would be the correct answer. (A).

The only other possible answer I could read into this would be the network. But I think the keyword is “problem caused”, Network statements are standard I have two pools on my little home 2600 one for wireless one for the Internet, but they are two different interfaces, so I don’t have a “pool problem” , so I’m assuming the base config is correct. ….what a @(#*&$ question….

Source:

http://www.cisco.com/en/US/docs/ios/12_2/ip/configuration/guide/1cfdhcp.html#wp1000999

We’ve airvred at the end of the line and I have what I need!

Q6. obviously B >,<

OMG, but it supposed to be “default-router” not “default-gateway” @_@

what about Q2?

Q2 is correct. Cabling problems can result on this scenario, i’ve seen it happend more than once. imagine tx and rx crossing.

This is a very nice forum. Congrat RSTUT. Very good info.

Q6:
My elimination works different:
See this:
http://www.cisco.com/en/US/docs/ios/12_0t/12_0t1/feature/guide/Easyip2.html#wp25541
three DHCP address pools are created. there no so called “problem”. all used “network” statements. network/host are there to define pools and I don’t think any of them is a solution to any problem.
default-gateway is obvious no.
so there is only “ip helper-address” left.

Hi Guys,

Q2: What would be the most probable reason for this port-ID mismatch?

Can any one please explain why cabling is the correct answer?

Any one tell me please, how many questions are there in CCIE R&S written exam and overall exam time in hours….

Hi Raj
I think its 100 multiple choice questions, exam duration is 2 hours

Hi,

For those of you making it this far here’s a good torrent with the VCE exam (crack included) and two CCIE question files each with 400+ questions.

http://kat.ph/ccie-r-s-questions-ultimate-vce-lead2pass-350-011-with-craked-visual-certexam-suite-1-9-987-vce-t6568020.html

Thanks again for the site RSTUT.

Hey guys, so what is our conclusion for Q6 ?

Hi,

Can anyone explain the answer to Q2? How can a cabling problem make switches at either end of a connection disagree about which port is used at one end?

Thanks in advance.

@Gareth: Please read more about UDLD, in case cisco optical port which TX of 1/0/3 connect to RX of other end 1/0/11, while RX of 1/0/4 connect to TX of other end 1/0/11
RX
1/0/3TX – – – – – – – – – – – – – – RX 1/0/11
Cisco A – – – – – – – – Tx CiscoB
1/0/4RX- – – – – -/
TX

You got it?

How much CCIE Written paper cost in USD ??

@bilal kahn – $350

@BILAL KAHN
Now the cost is 400$ USD 🙂 for CCIE R&S v5 Written

Hello CCIE engineers, I have a personal question, please I need a hand)

Possibility to provide same IP to clients equipment via DHCP protocol?

many thanks