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Neralitati EIGRP

The document provides a comprehensive guide on configuring EIGRP, including commands for setting up the routing protocol and verifying configurations. It outlines specific terminology related to EIGRP, such as successor, feasible distance, and reported distance, and offers troubleshooting steps to ensure proper connectivity and adjacency between routers. Additionally, it emphasizes the importance of matching autonomous system numbers and authentication for successful communication between routers.

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10 views19 pages

Neralitati EIGRP

The document provides a comprehensive guide on configuring EIGRP, including commands for setting up the routing protocol and verifying configurations. It outlines specific terminology related to EIGRP, such as successor, feasible distance, and reported distance, and offers troubleshooting steps to ensure proper connectivity and adjacency between routers. Additionally, it emphasizes the importance of matching autonomous system numbers and authentication for successful communication between routers.

Uploaded by

dj65crs
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Configurare EIGRP

CCNA2 – Routing Protocols and Concepts

BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 1
Continut
 Configurare
 Verificare
 Terminologie specifica
 Troubleshooting

BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 2
Configurare
Router(config)#
router eigrp AS-NR

Router(config-router)#
network RETEA [WILDCARD-MASK]

 Comanda identifica retele introduse/anuntate in EIGRP


+ interfetele active EIGRP.
 wildcard-mask este o masca inversa;
 0 – match; 1 – don't care;
BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 3
Configurare

Reteaua 192.168.1.0 nu este configurata pe A,


deoarece nu este direct conectata la A.
BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 4
Configurare - Exemple
Configuare classful:

routerA(config)#router eigrp 109


routerA(config-router)#network 10.1.0.0
routerA(config-router)#network 10.4.0.0
routerA(config-router)#network 172.16.7.0
routerA(config-router)#network 172.16.2.0

Configurare classless:

routerA(config)#router eigrp 109


routerA(config-router)#network 10.1.0.0 0.0.255.255
routerA(config-router)#network 10.4.0.0 0.0.255.255
routerA(config-router)#network 172.16.2.0 0.0.0.255
routerA(config-router)#network 172.16.7.0 0.0.0.255

BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 5
Observatie!

 Desi este protocol classless, EIGRP sumarizeaza


implicit la clasa!

//dezactivate sumarizare automata


(config-router)#no auto-summary

BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 6
Verificare: show ip eigrp neighbors

R1#show ip eigrp neighbors


IP-EIGRP neighbors for process 100
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 192.168.1.102 Se0/0/1 10 00:07:22 10 2280 0 5
R1#

BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 7
Verificare: show ip route eigrp
R1#show ip route eigrp
D 172.17.0.0/16 [90/40514560] via 192.168.1.102, 00:07:01,
Serial0/0/1
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
D 172.16.0.0/16 is a summary, 00:05:13, Null0
192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
D 192.168.1.0/24 is a summary, 00:05:13, Null0

R1#show ip route
<output omitted>
Gateway of last resort is not set
D 172.17.0.0/16 [90/40514560] via 192.168.1.102, 00:06:55,
Serial0/0/1
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
D 172.16.0.0/16 is a summary, 00:05:07, Null0
C 172.16.1.0/24 is directly connected, FastEthernet0/0
192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.1.96/27 is directly connected, Serial0/0/1
D 192.168.1.0/24 is a summary, 00:05:07, Null0
BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 8
Verificare: show ip protocols
R1#show ip protocols
Routing Protocol is "eigrp 100"
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 100
EIGRP NSF-aware route hold timer is 240s
<output omitted>

Maximum path: 4
Routing for Networks:
172.16.1.0/24
192.168.1.0
Routing Information Sources:
Gateway Distance Last Update
(this router) 90 00:09:38
Gateway Distance Last Update
192.168.1.102 90 00:09:40
BSCI 2 - 2 Distance:
© 2006 Cisco Systems, Inc. All rightsinternal
reserved. 90 external 170
Cisco Confidential 9
Verificare: show ip eigrp
interfaces
R1#show ip eigrp interfaces
IP-EIGRP interfaces for process 100
Xmit Queue Mean Pacing Time Multicast Pending
Interface Peers Un/Reliable SRTT Un/Reliable Flow Timer Routes
Fa0/0 0 0/0 0 0/10 0 0
Se0/0/1 1 0/0 10 10/380 424 0

BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 10
Verificare: show ip eigrp topology

R1#show ip eigrp topology


IP-EIGRP Topology Table for AS(100)/ID(192.168.1.101)
Codes: P - Passive, A - Active, U - Update, Q - Query, R -
Reply,
r - reply Status, s - sia Status
P 192.168.1.96/27, 1 successors, FD is 40512000
via Connected, Serial0/0/1
P 192.168.1.0/24, 1 successors, FD is 40512000
via Summary (40512000/0), Null0
P 172.16.0.0/16, 1 successors, FD is 28160
via Summary (28160/0), Null0
P 172.16.1.0/24, 1 successors, FD is 28160
via Connected, FastEthernet0/0
P 172.17.0.0/16, 1 successors, FD is 40514560
via 192.168.1.102 (40514560/28160), Serial0/0/1

BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 11
Verificare: show ip eigrp traffic

R1#show ip eigrp traffic


IP-EIGRP Traffic Statistics for AS 100
Hellos sent/received: 429/192
Updates sent/received: 4/4
Queries sent/received: 1/0
Replies sent/received: 0/1
Acks sent/received: 4/3
Input queue high water mark 1, 0 drops
SIA-Queries sent/received: 0/0
SIA-Replies sent/received: 0/0
Hello Process ID: 113
PDM Process ID: 73

BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 12
Terminologie specifica

 Succesor – routerul vecin folosit pentru


forwarding si care are ruta cu cel mai mic cost
pentru reteaua destinatie; (IP-ul sau apare in R.T.
dupa 'via');

 Feasable Distance – metrica cea mai buna a unei


rute; ruta respectiva este introdusa in RT;

BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 13
Terminologie specifica

Reported Distance (Advertised distance) – metrica


unei retele, insa din perspectiva vecinului. (metrica
vecinului pentru acea retea)

Feasable Succesor – este routerul de backup (un alt


'via') catre o retea destinatie, care indeplineste conditia de
fezabilitate → metrica sa catre reteaua destinatie trebuie
sa fie mai mica decat actuala feasable distance;
(Reported distance < Feasable distance);

BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 14
Terminologie specifica

BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 15
Troubleshooting
 Intotdeauna, inainte de a se configura EIGRP, se verifica
conectivitatea IP dintre vecini. (ping)
 Se verifica daca au fost introduse in EIGRP interfetele
corecte: show ip eigrp interfaces
 Se verifica daca s-au stabilit adiacente:
show ip eigrp neighbors
 Se verifica daca au fost primite informatii de la vecini:
show ip eigrp topology {all-links}
 Se verifica global EIGRP:
show ip protocols
BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 16
Probleme de adiacenta
 Pentru ca doua routere sa poata comunica intre ele, trebuie
respectate urmatoarele conditii:
- sa faca parte din acelasi sistem autonom (AS_NO);
- sa faca parte din aceeasi retea;
- sa se poata autentifica reciproc;
- sa aiba aceleasi valori K pt. calculul metricii;

BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 17
Intrebari?

BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 18
BSCI 2 - 2 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 19

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