I'm hoping someone can help. I'm taking a CCNA class and plan on taking the CCNA soon. However, I've got a bit of a environment setup question. Say I've got two routers. One that has a Static IP address from my ISP and then the other interface is connected directly to the other router, which contains the access-list. How would I just forward all the traffic going to/from R1 to R2? Would Static routes work? Any advice would be great. Thank you! 

I cant for the life of me figure out what is going on here.  It has to be either something so simple that was overlooked or the sim is totally bunk!  Unfortunately, the test only says "Incorrect IP address or interface state or passwords" (on both routers)

Cables are definitely correct.

Someone please help, I'm taking the test tomorrow!

thx

Here is my procedure:

login to left router:

conf t
line con 0
password consolepw
login

line vty 0 4
password telnetpw
login

exit

enable secret privpw

int fa0/0
ip address 192.168.142.81 255.255.255.240
no shut

int fa0/1
ip address 192.168.142.30 255.255.255.240
no shut

ctrl^z

copy run start
[ok]

exit

login to right router:

conf t
line con 0
password consolepw
login

line vty 0 4
password telnetpw
login

exit

enable secret privpw

int s0/1
ip address 192.168.142.161 255.255.255.240
no shut

int fa0/0
ip address 192.168.142.78 255.255.255.240
no shut

ctrl^z

copy run start
[ok]

exit

Hello,

BDRs must enter into a Full state with all other routers on the link.  As you can see this is not happening.  It is not happening because this router is not a BDR.   Router RTA and neighbor 192.168.45.2 are exchanging OSPF LSAs.  This is correct because before the DR and the BDR are established each router thinks they are the DR and sends out LSAs to discover their neighbor and inform their neighbors of the links that they are connected to.

20. (QID:N2C73) View the exhibit. Which statement is true?

Router RTA is directly connected to interface 192.168.45.1.
Neighbor 192.168.45.1 has changed its OSPF priority number.
Router RTA and neighbor 192.168.45.2 are exchanging OSPF LSAs.
Router RTA is the BDR.

Correct Answer: Router RTA is the BDR.

Hello,

Your answer makes no sense to me.  If RT1 is an ABR why would it inject a type 7 default route into its own routing table.  It doesn't do that.  Instead it injects a type 7 default route into the routing table of other routers in the area.  So this means the answer needs to be:

The default route is learned from an OSPF neighbor.

That is the correct answer.

11. (QID:N2C67) Refer to the exhibit. On the basis of the information presented, which statement is true?
Exhibit:

RT1# show ip route ospf
O IA     6.0.0.0/8 [110/65] via 5.0.0.2, 00:00:18, Serial2/1/0
O* N2   0.0.0.0/0 [110/1] via 5.0.0.2, 00:00:18, Serial2/1/0

Network 6.0.0.0/8 was learned from an OSPF neighbor within the area.
The default route is learned from an OSPF neighbor.
OSPF router 5.0.0.2 is an ABR.
A default route is configured on the local router.

Correct Answer: OSPF router 5.0.0.2 is an ABR.

Explanation:
It looks like the OSPF area is an NSSA Totally Stubby Area, a Cisco proprietary feature. When the ABR is configured with the area 1 nssa no-summary command, it works exactly the same as the totally stubby technique. A single default route replaces both inbound-external (type 5) LSAs and summary (type 3 and 4) LSAs into the area. The NSSA ABR, automatically generates the O*N2 default route into the NSSA area with the no-summary option configured at the ABR.

http://www.cisco.com/warp/public/104/nssa.html

Hello,

Please consider the following:
Stub area?This is an area that will not accept external summary routes (Type 5s). Type 5 LSAs are replaced by the ABR with a default route, and internal routers send external traffic to the closest ABR. Stub areas are useful because they protect slower or less powerful routers from being overwhelmed with routes from outside.

Do you see a default route injected by an ABR into this routing table, because I certainly don't.  All stubs must have a default route injected into the area by the ABR.  There isn't a default route; there is a gateway of last resort but the next hop of the gateway is not in the routing table.  This makes this router an ABR.

Please correct.  Thanks!!!

EXHIBIT:
Router# show ip route

Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default

Gateway of last resort is 30.64.0.2 to network 0.0.0.0

30.0.0.0/8 is variably subnetted, 9 subnets, 2 masks
O IA    30.2.0.0/16 [110/74] via 30.64.0.2, 00:09:13, Ethernet0
C        30.1.3.0/24 is directly connected, Serial0
O IA    30.3.0.0/16 [110/148] via 30.64.0.2, 00:05:22, Ethernet0
C        30.1.2.0/24 is directly connected, Serial1

(QID:N2C33) Consider the output of a show ip route command shown in the exhibit. Which two statements about the routing table are true? (Choose two)

The area is a stub.
The area is totally stubby.
Network 30 is using VLSM.
The routing table is for an ABR.

Correct Answer: The area is a stub.
                          Network 30 is using VLSM.
Explanation:
Inter-area summary routes (O IA) are included in the routing table, therefore, it is not a Totally Stubby Area, it is a Stub Area.

The statement, "30.0.0.0/8 is variably subnetted, 9 subnets, 2 masks", shows that network 30 is using VLSM. VLSM means a network can be variably subnetted into smaller networks, where each smaller network can have a different subnet mask.

Hello,

Please refer to the following resources as the answer to this question needs to be reconsidered as multipath not multihop:

http://www.cisco.com/en/US/tech/tk365/te...l#bgpmpath
BGP Multipath allows installation into the IP routing table of multiple BGP paths to the same destination. These paths are installed in the table together with the best path for load sharing

http://www.cisco.com/en/US/docs/ios/12_2...eibmp.html
The BGP Multipath Load Sharing for eBGP and iBGP feature allows you to configure multipath load balancing with both external BGP (eBGP) and internal BGP (iBGP) paths in Border Gateway Protocol (BGP) networks that are configured to use Multiprotocol Label Switching (MPLS) Virtual Private Networks (VPNs). This feature provides improved load balancing deployment and service offering capabilities and is useful for multi-homed autonomous systems and Provider Edge (PE) routers that import both eBGP and iBGP paths from multihomed and stub networks.

22. (QID:NF76) Which BGP option is required when load sharing over multiple equal-bandwidth parallel links from a single CE router to a single ISP router over eBGP?

eBGP Multipath
eBGP Multihop
BGP Synchronization
Public AS numbers

Correct Answer: eBGP Multihop

I was curious if some one could help explain why there are 3 paths.

If metric is >60  only 2 paths meet that requirement
If metric is >=60 then 4 paths meet that requirement.

Hello,

Please see:  http://www.cisco.com/web/about/ac123/ac1...onfig.html

This link clearly explains that a requirement of a link local address is that the following 16 bits are inserted in the middle of the 48 bit mac address making for a total of 64 bits:  ff:fe

Your link local address is FE80::A1:56C2:1102
but if the MAC address is 00A1:56C2:1102 then your address should be FE80::A1:56ff:feC2:1102

When changing a link local prefix to a global prefix the following would then be performed, the host would see that the router is sending a prefix of /64 and thus would take and append the last 64 bits of the link local address and would append then first 64 bits of the given prefix of its router.  Thus the correct answer is:

2001:AAAA:BBBB:CCCC:A1:56ff:feC2:1102/64

2001:AAAA:BBBB:CCCC:FE80::A1:56C2:1102 - this cannot be an answer because the double colon is an incorrect rendering of a proper IPv6 address.  There are already eight 16 bit sections... so why is there a :: double colon when it would represent a minimum of one 16 bit section of all 0000 s?  That address implies that there is such a thing as an IPv6 address with 9 sections of 16 bits, which is incorrect.

35. (QID:NH84) A workstation has a Link-local IPv6 address FE80::A1:56C2:1102 and is setting a global unicast IPv6 address via stateless auto-configuration. The router connected to the LAN has a global IPv6 address of 2001:AAAA:BBBB:CCCCDDD::l/64. What will your workstation set its IPv6 address to once it detects the router advertisements?

2001:AAAA:BBBB::A1:56C2:1102
2001:AAAA:BBBB:CCCC:FE80::A1:56C2:1102
2001:AAAA:BBBB:FE80::A1:56C2:1102
2001:AAAA:BBBB:CCCCDDD:A1:56C2:1102

Correct Answer: 2001:AAAA:BBBB:CCCC:FE80::A1:56C2:1102

Please correct

Joshua

In the explanations they give some solutions to stop split horizon from causing problems but wouldn't a default route from the "spokes" to the central router solve this problem easiest?

This should work since R1 was receiving updates from both R2 and R3, it just wasn't propagating them.

Hello,

IGMP is a communications protocol.  It is not a routing protocol.  You are also missing one correct answer which is  IGMP snooping runs on Layer 3 routers.  This is indeed correct.  See link

http://en.wikipedia.org/wiki/Internet_Gr...t_Protocol

25. (QID:NG16) Which three statements are true about the Internet Group Management Protocol (IGMP)? (Choose three)

IGMP is used to register individual hosts with a multicast group.
IGMP is a multicast routing protocol that makes packet-forwarding decisions independent of other routing protocols such as EIGRP.
IGMP version 3 enables a multicast receiving host to specify to the router which sources it should forward traffic from.
IGMP messages are IP datagrams with a protocol value of 2, destination address of 224.0.0.2, and a TTL value of 1.
There are three IGMP modes: dense mode, sparse mode, and sparse-dense mode.
IGMP snooping runs on Layer 3 routers.

Correct Answer:

IGMP is a multicast routing protocol that makes packet-forwarding decisions independent of other routing protocols such as EIGRP.
IGMP is used to register individual hosts with a multicast group.
IGMP version 3 enables a multicast receiving host to specify to the router which sources it should forward traffic from.