CCNP TSHOOT CHAPTER 7 (EIGRP ADj)

CCNP TSHOOT CHAPTER 7 (EIGRP ADj)
12. What are the possible issues for Eigrp adj formatoin ?
13. What are common issues to build eigrp routes ?
-->
Solution:
1. Network Properly not configured.
!
sh ip protocols
!
2. AS-number must match.
3. By default it uses multicast , to stop multicast we can use neighbour commad.
! neighbour 10.0.0.55 s0/1
4. Authentication issues
!
# sh run int s1/0 | in authen
sh key chain
!
5. K-values must match.
6. Check passive interface plus L1/L2/L3 issues
7. Eigrp Masks and timers "do not" have to always be an exact match.
sh ip eig interface
sh ip protocols
sh ip eigrp neigh
show interfa s1/0 | in Encapsulation|Internet address
8. for slow links eigrp send hellos after 60 sec in fast link it send pkt after 5 secs.

13. What are common issues to build eigrp routes ?
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1. First check the adjacency table : with show ip eigrp neighbour command
2. Is Distribute list blocking any route.
3. Check auto-summary command.
4. Is any eigrp stub is configured .
5. Check in the network same Router-id is configured.

Check outputs in case of eigrp :

1.1.1.1(L1)---R1(10.1.1.1/24)-----------------10.1.1.2/24(R2)----2.2.2.2(L1)

R1
!
!
hostname R1
!
!
key chain RAT
 key 1
   key-string cisco
!
interface Loopback1
 ip address 1.1.1.1 255.255.255.255
!
interface FastEthernet0/0
 ip address 10.1.1.1 255.255.255.0
 ip authentication mode eigrp 10 md5
 ip authentication key-chain eigrp 10 RAT
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
router eigrp 10
 network 1.0.0.0
 network 10.0.0.0
 no auto-summary
!
end
!
hostname R2
!
key chain RAT
 key 1
   key-string cisco
!
interface Loopback1
 ip address 2.2.2.2 255.255.255.255
!
interface FastEthernet0/0
 ip address 10.1.1.2 255.255.255.0
 ip authentication mode eigrp 10 md5
 ip authentication key-chain eigrp 10 RAT
 duplex auto
 speed auto
!
router eigrp 10
 network 2.0.0.0
 network 10.0.0.0
 no auto-summary
!
----------------- OUTPUTs
R2#sh ip protocols
Routing Protocol is "eigrp 10"
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  Default networks flagged in outgoing updates
  Default networks accepted from incoming updates
  EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
  EIGRP maximum hopcount 100
  EIGRP maximum metric variance 1
  Redistributing: eigrp 10
  EIGRP NSF-aware route hold timer is 240s
  Automatic network summarization is not in effect
  Maximum path: 4
  Routing for Networks:
    2.0.0.0
    10.0.0.0
  Routing Information Sources:
    Gateway         Distance      Last Update
    10.1.1.1              90      00:02:21
  Distance: internal 90 external 170

  R2#sh run int fa0/0 | in authentication
 ip authentication mode eigrp 10 md5
 ip authentication key-chain eigrp 10 RAT
R2#sh key chain
Key-chain RAT:
    key 1 -- text "cisco"
        accept lifetime (always valid) - (always valid) [valid now]
        send lifetime (always valid) - (always valid) [valid now]
R2#sh ip eigrp interface
IP-EIGRP interfaces for process 10
                        Xmit Queue   Mean   Pacing Time   Multicast    Pending
Interface        Peers  Un/Reliable  SRTT   Un/Reliable   Flow Timer   Routes
Lo1                0        0/0         0       0/1            0           0
Fa0/0              1        0/0        56       0/2          276           0

R2#sh ip eigrp neighbor
IP-EIGRP neighbors for process 10
H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq
                                            (sec)         (ms)       Cnt Num
0   10.1.1.1                Fa0/0             12 00:04:03   56   336  0  8

R2#sh interfaces fa0/0 | in Encapsulation|Internet address
  Internet address is 10.1.1.2/24
  Encapsulation ARPA, loopback not set