Plugga CCNP Route--EIGRP
From Datateknik
intro EIGRP
EIGRP
- Implement hub and spoke topology: What is important
- CIR of all PVC's,
- IOS version on all routers and
- routing policy (if spokes can be transit point between the two HQ's)
- Q: Eigrp statistics of packets
- A: show ip eigrp traffic
- Q13: How EIGRP initially populate (seed) its topology table (before talking to neighbors)
- By adding subnets of working interfaces over which static neighbors have been defined
- By adding subnets redistributed from other routing sources
- Q16: Autosummary of subnetted classful networks
- The summarization happens on the last router in the classful "bubble"
- Only this router (N2 and B2) need "no auto summary"
10.0.0.0-- N1 --10.1.0.0-- N2 --192.168.13.0-- B2 --172.16.16.0-- B1 --172.16.17.0
- Q21: What is EIGRP true
- Update packets route reliable change information only to the affected routers.
- Q23: Stop wan link AND Hub ethernet to be announced to the Core
- "EIGRP stub" announces WAN-link NET
- should be "Implement a distribute list to exclude the link prefix from the routing updates
- Correct (NOT sic) "Use a mask with the network command to exclude interface serial 0/0/0" (the wan link)
- Q28: Never forget to document
- Answer: "It should contain a task that documents the changes made to the configurations.
- 0. Rob says create a baseline
- 1. Configure variance on R1 and R4
- 2. Use traceroute to validate load balancing has been activated
- 3. Document configuration changes
- 4. Establish a new traffic throughput baseline
- 5. Compare the new and old baselines and verify that load balancing is implemented as desired.
- Q41: Load balancing over 4 paths (network 10.0.0.0, variance 3
/-20--R4--25-\
/ \
-- R1--20--R3--10--R5 --
\ /
\-10--R2--20-/
- Answer: "Becouse R4 is not a feasable Successor (FS), EIGRP will not select the path R1-R4-R5 for load balancing
- Q44: EIGRP Truths
- When summarization is configured, the router will also create a route to null 0
- Summarization is configured on a per-interface level.
- Automatic summarization across major network boundaries is enabled by default.
- Rob say's: Also, but not quite: The maximum metric for the specific routes is used as the matric for the summary route.
- Q448: AD for EIGRP summary routes
": A: 5
- Q52: Order of events when a topology change is, and there is a FS
- A: DUAL is notified
- The neighbour adjacency is deleted
- remove all entries learned from that neighbour
- the feasable route is used (Rob: formerly the Feasable Successor route)
- Q53: Which three networks is the router at 172.17.10.2 directly connected to? (Choose three)
P 172.17.10.0/24, 1 successors, FD is 28160 semo 15 via Connected, FastEthernet 0/1
Find 28160 as RD on all routes
P 172.17.2.0, 1 successor, FD is 30720, semo 3 via 172.17.10.2 (30720/28160), FastEthernet0/1 via 172.17.3.2 (33280/30720), FastEthernet0/3 P 172.17.3.128, 2 successor, FD is 30720, semo 3 via 172.17.10.2 (30720/28160), FastEthernet0/1 via 172.17.3.2 (30720/28160), FastEthernet0/3
- A.172.17.0.0/30
- B.172.17.1.0/24
- C.172.17.2.0/24 (Correct)
- D.172.17.3.0/25
- E.172.17.3.128/25 (Correct)
- F.172.17.10.0/24 (Correct)
- Q57:
10.0.0.0-- Router A --172.16.0.0-- <-Router B->s0 --192.168.5.0
Router B:
router eigrp 1
network 172.16.0.0
network 172.168.5.0
distribute-list 7 out s0
access-list 7 permit 172.16.0.0 0.0.255.255
- A: Router B will not advertise the 10.0.0.0/8 network becouse of it is blocked by the ACL
- Key concepts of "EIGRP stub" in a hub and spoke network?
- Only remote routers are configured as stubs
- Stub routers are not queried for routes
- A stub router should only have EIGRP hub routers as neighbours (WARNING)
- Q60: Which statement for a non-zero value for the load metric (k2) for EIGRP is true? Select the best response
- A: EIGRP considers the load of an interface only when sending an update for some other reason.
- (EIGRP updates are triggered by a change in the network topology (like links, interfaces go up/down, router added/removed (and not by changes in interface load or reliability)
- Q64: Which command will display the tweo values used in the calculation of EIGRP metric?
- A: show interface
Router# show ip eigrp interfaces
IP EIGRP interfaces for process 1
Xmit Queue Mean Pacing Time Multicast Pending
Interface Peers Un/Reliable SRTT Un/Reliable Flow Timer Routes
Di0 0 0/0 0 11/434 0 0
Et0 1 0/0 337 0/10 0 0
SE0:1.16 1 0/0 10 1/63 103 0
Tu0 1 0/0 330 0/16 0 0
--------------------
router#show interface atm 10/1/0
ATM10/1/0 is up, line protocol is up
Hardware is cyBus ENHANCED ATM PA
MTU 1500 bytes, sub MTU 1500, BW 149760 Kbit, DLY 80 usec,
reliability 249/255, txload 1/255, rxload 1/255
- Q76
key chain fred key 3 key-string whehew interface fa0/0 ip authentication key-chain eigrp 9 fred
- Answer: The configuration is missing one authentication-related configuration command.
- Rob say's: ip authentication mode eigrp <AS> md5
- What is true regarding EIGRP route summarization
- A. Manual route summarization is configured in router configuration mode when the router is configured for EIGRP routing.
- B. Manual route summarization is configured on the interface.
- C. When manual summarization is configured, the summary route will use the metric of the largest specific metric of the summary routes. (True?? But wrong answer)
- D. The ip summary-address eigrp command generates a default route with an administrative distance of 90.
- E. The ip summary-address eigrp command generates a default route with an administrative distance of 5. (OBS Note "D"-route AD=5 bara lokalt !!)
- F. When manual summarization is configured, the router immediately creates a route that points to null0 interface
- Answer: B E F
- Q84: Fix EIGRP Hub on FR NBMA
- A: use no ip split horizon eigrp 1
- NOT no ip split horizon (Läs alla svar !!)
- Q88:
After implementing EIGRP on your network, you issue the show ip eigrp traffic command on router C. The following output is shown: RouterC#show ip eigrp traffic IP-EIGRP Traffic Statistics for process 1 Hellos sent/received: 2112/2076 Updates sent/received: 47/38 Queries sent/received: 5/3 Replies sent/received: 3/4 Acks sent/received: 29/33 Input queue high water mark 2, 0 drops SIA-Queries sent/received: 0/0 SIA-Replies sent/received: 0/0 Moments later, you issue the same command a second time and the following output is shown: RouterC#show ip eigrp traffic IP-EIGRP Traffic Statistics for process 1 Hellos sent/received: 2139/2104 Updates sent/received: 50/39 Queries sent/received: 5/4 Replies sent/received: 4/4 Acks sent/received: 31/37 Input queue high water mark 2, 0 drops SIA-Queries sent/received: 0/0 SIA-Replies sent/received: 0/0 Moments later, you issue the same command a third time and the following output is shown: RouterC#show ip eigrp traffic IP-EIGRP Traffic Statistics for process 1 Hellos sent/received: 2162/2126 Updates sent/received: 53/42 Queries sent/received: 5/5 Replies sent/received: 5/4 Acks sent/received: 35/41 Input queue high water mark 2, 0 drops SIA-Queries sent/received: 0/0 SIA-Replies sent/received: 0/0
What information can you determine about this network? A. The network is stable. B. There is a flapping link or interface, and router C knows an alternate path to the network. C. There is a flapping link or interface, and router C does not know an alternate path to the network. D. EIGRP is not working correctly on router C. E. There is not enough information to make a determination. Answer: B
- Q95: Refer to the exhibit. A partial routing configuration is shown. Complete the configuration so that only the default-network is redistributed from EIGRP 190 into EIGRP 212. Which ACL statement completes the configuration correctly?
router eigrp 190 redistribute eigrp 212 network 192.0.0.0 0.0.0.3 ! router eigrp 212 redistribute eigrp 190 route-map default_route network 212.50.185.96 0.0.0.31 ! route-map defau1t_route permit 10 match ip address 100 A. access-list 100 permit ip 0.0.0.0 0.0.0.0 0.0.0.0 0.0.0.0 B. access-list 100 permit ip host 0.0.0.0 any C. access-list 100 permit ip any host 0.0.0.0 D. A default-network cannot be redistributed between routing processes. Answer: C Explanation The command “access-list 100 permit ip any host 0.0.0.0″ means permit any source address with the destination of 0.0.0.0/0, which is the default route Note: any equals 0.0.0.0 255.255.255.255 host 0.0.0.0 equals 0.0.0.0 0.0.0.0
