View source for Plugga CCNP Route--EIGRP

intro
[[Plugga_CCNP_Route--EIGRP|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 <b>static neighbors</b> 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'''

==two==
* [http://ipsn6tap.blogspot.se/2010/05/ccnp-route-eigrp-table-2-1-do-i-know.html http://ipsn6tap.blogspot.se/2010/05/ccnp-route-eigrp-table-2-1-do-i-know.html]
* [http://www.digitaltut.com/category/route-642-902 http://www.digitaltut.com/category/route-642-902]