Distribute List

Hello everyone, someone knows why the sim in the exam 300-101, do not accept the command ( copy running-config startup-config), is this command necessary. ? only accept this command in the SIM OSPF stub. when I put the command, showed me this ” Command is not implemented”

Are we certain Q3 is correct?

Per Cisco the passive-interface command – “With most routing protocols, the passive-interface command restricts outgoing advertisements only”

It does not stop incoming routing updates, only outgoing.

https://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/13675-16.html

Q3 – please update answer to C

per cisco – “Using the passive interface command can prevent routers from sending routing updates through a router interface.”

https://www.cisco.com/c/en/us/support/docs/ip/interior-gateway-routing-protocol-igrp/9105-34.html

@ Guacca
yeah Q3 should be option c

Question 3

Which command prevents routers from sending routing updates through a router interface?
A. default-metric 0
B. distribute-list in
C. passive-interface
D. distribute-list out

C is the correct answer.

I believe

Question 3 – correct answer should be C. passive-interface
Which command prevents routers from sending routing updates through a router interface?

A. default-metric 0
B. distribute-list in
C. passive-interface
D. distribute-list out

Question is saying “Which command PREVENTS…”

“Preventing Routing Updates Through an Interface”

Using the passive interface command can prevent routers from sending routing updates through a router interface. Keeping routing update messages from being sent through a router interface prevents other systems on that network from learning about routes dynamically. For examples using the passive interface command, see the “Passive Interface Examples” section in Configuring IP Routing Protocol-Independent Features.

For RIP and IGRP, the passive interface command stops the router from sending updates to a particular neighbor, but the router continues to listen and use routing updates from that neighbor; however, on EIGRP, the passive interface command affects the protocol differently, as explained in How Does the Passive Interface Feature Work in EIGRP?

“Controlling the Processing and Advertising of Routes in Routing Updates”

To control the advertising and processing of routes in routing updates, use the distribute-list command. There are two distribute-list commands: distribute-list in and distribute-list out. They are similar in syntax, but the options available to each and their behavior are very different.

The distribute-list in command is used to control which routes are processed in incoming routing updates. See the Using distribute-list in section for an example of this command.

The distribute-list out command is used to control which routes are included in outgoing routing updates. See the Using distribute-list out section for an example.

https://www.cisco.com/c/en/us/support/docs/ip/interior-gateway-routing-protocol-igrp/9105-34.html

Q3. Correct answer is C

Q3. is definitely answer ‘C’, passive-interface. distribute-list does not inherently block outgoing updates. the key thing about distribute-list is to FILTER updates to your liking, which would likely include permitting some routes through. With everyone calling this out, why isn’t PDF updated?

Dose anyone have the full version for this dumps? https://drive.google.com/open?id=0B5mAFqgydmCzVWtzU09fYV9SZGc

Can anyone give an explaination about distributed list

Scored 9xx, used dumps from IT-Libraries. You can find them on the net for free or in the comments here.

@dane can you share your dumps?

Hi Digitut,

update the same things in the Composite Quizzes, as the Composite Quizzes show the answer as distribute-list out.

Question 3

Which command prevents routers from sending routing updates through a router interface?

A. default-metric 0
B. distribute-list in
C. passive-interface
D. distribute-list out

Answer: C

9TUT
Please corect Question 23 Composite Quizz 15
showing B. distribute-list out
The corect answer is C. passive-interface

Good

Update @M2 info

Question 3

Which command prevents routers from sending routing updates through a router interface?
A. default-metric 0
B. distribute-list in
C. passive-interface
D. distribute-list out

Answer is C. But in Composite Quizzes 1 it’s D.

Question 1. Answer E is ok, but is very stupid
“E. Router B will not advertise the 10.0.0.0/8 network because it is blocked by the ACL”
First of all, 10.0.0.0/8 is directly connected interface of Router A.So, Router A will send network “10.0.08/8” through EIGRP routing updates.
But, router B interface which connect to ROuter A is also EIGRP enabled interface (let’s suppose A f0/0 is connected to Bf0/0. On B, enable eigrp on f0/0 and that means, by default, split-horison ENABLED and route learned from that interface will not be advertise back.. That means no way, ROuter B will send back 10.0.0.0/8.
On the other hand, i agree theoretical, 10.0.0/8 is not written in access-list, but even without distribute-list, B will never advertise 10.0.0.0/8 to Router A.

In NUQ – Part 5 we find a question (Q13) like the Distributed list Q3

Refer to the exhibit.

access-list 1 permit 10.1.1.0 0.0.0.255
access-list 1 deny any

Which command we use to control the type of routes that are processed in incoming route updates?

A. passive-interface
B. distribute-list 1 out
C. distribute-list 1 in
D. ip vrf forwarding

Answer is C

the difference with Q3 is that there is an access-list. If there is not this ACL the answer is “passive-interface”.

Question 3

Which command prevents routers from sending routing updates through a router interface?
A. default-metric 0
B. distribute-list in
C. passive-interface
D. distribute-list out

Answer is D. These questions are talking about the freaking distribution list/access list. The topic if the questions are distribution lists that go along with ACCESS LIST. You guys are not reading completely through the information. You are grabbing the first piece of info and running with it. @ Sorlags with the last post is correct. I see Sorlags corrected his post from over a year ago where he said passive-interface was correct but it wasn’t.

Please continue to read deeper with the post below from the cisco book…concerns EIGRP and passive interface usage.
https://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/13675-16.html#passive

When the passive-interface command is used in EIGRP, the router cannot form neighbor adjacencies on the interface, or send or receive routing updates. But, if you want the outgoing routing updates alone to be suppressed but the inbound updates continue to be received (and the routers still continue to be neighbors), then use the distribute-list command:

R1(config)#access-list 20 deny any

R1(config)#router eigrp 1
R1(config-router)#no passive-interface serial 0
R1(config-router)#distribute-list 20 out serial 0 (obviously if you want incoming updates ALONG to be suppressed, you change it to IN)

….i.e. The question asks about controlling processed incoming route updates. The question does not ask “how to kill neighbors completely”. If you use the passive interface command on eigrp it stops EVERYTHING not just updates.

plus i took the damn test and scored nearly perfect on it. I missed maybe 4 questions total

R1(config)#access-list 20 deny any

R1(config)#router eigrp 1
R1(config-router)#no passive-interface serial 0
R1(config-router)#distribute-list 20 out serial 0 (obviously if you want incoming updates ALONE to be suppressed, you change it to IN)

Misspelled alone by mistake…doesn’t matter though. Answer is still the same damn thing i posted.

My bad, I see that @Sorlags still didn’t completely understand that they are talking about distribution lists, which are extensions of access list. This topic isn’t even talking about passive interface anywhere on this page period.

Again, read what I posted above. passive interface causes issues with EIGRP. The question doesn’t ask about all protocols except EIGRP. We are to assume they are talking about every protocol and passive interface causes issues with EIGRP. This is why using a distribution list is the answer.

I would like to see an explanition from Q1. Why answer A is not correct?

@SNBOY – traffic will not be blocked , its routing updates . Also the ACL explicitly permits 172.x.x.x network .

whats is time based ACL

Time-based ACLs are types of control lists that allow for network access based on time or day. Its function is similar to that of the extended ACLs. Time-based ACLs is implemented by creating a time range that defines specific times of the day and week. … The time range relies on the router system clock.