BSCI: LAB EIGRP – Configuration
Bienvenue dans ce nouveau Laboratoire sur EIGRP, que j’écris dans le cadre de mes révisions du CCNP BSCI. Nous allons voir la configuration de base EIGRP, suivie des commandes de vérification des 3 tables d’EIGRP (Neighbors/Topology/Routing). Les autres labs suivront dans les jours à venir…
Voici le schéma de la topologie:
Dynagen:
Fichier de topologie Dynagen .net #### # Course: BSCI - EIGRP # Author: Benoit GONCALVES # Version: 1.1 ### autostart = True [localhost:7200] [[7200]] [[ROUTER R1]] image = c7200-adventerprisek9-mz.124-15.T6.bin cnfg = R1.txt npe = npe-400 ram = 160 nvram = 256 mmap = False console = 2002 # modules/slots # cabling S1/0 = R2 S1/0 F0/0 = S1 1 [[ROUTER R2]] image = c7200-adventerprisek9-mz.124-15.T6.bin cnfg = R2.txt npe = npe-400 ram = 160 nvram = 256 mmap = False console = 2003 # modules/slots # cabling F0/0 = S1 3 [[ROUTER R3]] image = c7200-adventerprisek9-mz.124-15.T6.bin cnfg = R3.txt npe = npe-400 ram = 160 nvram = 256 mmap = False console = 2004 # modules/slots # cabling F0/0 = S1 5 [[ETHSW S1]] 1 = access 1 3 = access 1 5 = access 1
R1.txt
! no ip domain lookup no ip http server ! hostname R1 ! interface Loopback1 ip address 10.1.1.1 255.255.255.0 ! interface FastEthernet0/0 ip address 10.1.100.1 255.255.255.0 no shutdown ! ! interface Serial 1/0 bandwidth 64 ip address 10.1.200.1 255.255.255.0 clockrate 64000 no shutdown ! router eigrp 1 network 10.0.0.0 auto-summary ! end
R2.txt
no ip domain lookup no ip http server ! hostname R2 ! interface Loopback2 ip address 10.1.2.1 255.255.255.0 ! interface FastEthernet0/0 ip address 10.1.100.2 255.255.255.0 no shutdown ! interface Serial 1/0 bandwidth 64 ip address 10.1.200.2 255.255.255.0 no shutdown ! router eigrp 1 network 10.0.0.0 auto-summary ! end
R3.txt
no ip domain lookup no ip http server ! hostname R3 ! interface Loopback3 ip address 10.1.3.1 255.255.255.0 ! interface Loopback11 ip address 192.168.100.1 255.255.255.252 ! interface Loopback15 ip address 192.168.100.5 255.255.255.252 ! interface FastEthernet0/0 ip address 10.1.100.3 255.255.255.0 no shutdown ! ! router eigrp 1 network 10.0.0.0 network 192.168.100.0 0.0.0.3 auto-summary ! end
Pour configurer EIGRP, rien de plus simple:
! On active le processus EIGRP dans l'Autonomous Système 1 R1(config)#router eigrp 1 ! EIGRP sera actif sur le réseau 10.0.0.0, soit toute nos interfaces sur R1 R1(config-router)#network 10.0.0.0
Maintenant que vous avez tout bien configuré, Voici un debug paquet qui montre les Paquets HELLO, ACK et UPDATES envoyés et reçus quand on active EIGRP. EIGRP commence par envoyer des paquets HELLO et en reçois de ses voisins, ainsi, il forme la table d’adjacence/voisinage (neighbor table). Ensuite les routeurs s’envoient leurs tables de routages afin d’avoir une vue partielle de la topologie avoisinante.
R2#deb eigrp packet
EIGRP Packets debugging is on
(UPDATE, REQUEST, QUERY, REPLY, HELLO, IPXSAP, PROBE, ACK, STUB, SIAQUERY, S
IAREPLY)
R2#
R2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R2(config)#
R2(config)#router eigrp 1
R2(config-router)#network 10.0.0.0
R2(config-router)#
*Jan 12 22:03:44.279: EIGRP: Sending HELLO on FastEthernet0/0
*Jan 12 22:03:44.279: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Jan 12 22:03:44.287: EIGRP: Sending HELLO on Loopback2
*Jan 12 22:03:44.287: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Jan 12 22:03:44.299: EIGRP: Received HELLO on Loopback2 nbr 10.1.2.1
*Jan 12 22:03:44.303: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
*Jan 12 22:03:44.303: EIGRP: Packet from ourselves ignored
*Jan 12 22:03:44.491: EIGRP: Received HELLO on FastEthernet0/0 nbr 10.1.100.1
*Jan 12 22:03:44.491: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
*Jan 12 22:03:44.499: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 10.1.100.1 (FastEthernet0/0) is up: new adjacency
*Jan 12 22:03:44.503: EIGRP: Enqueueing UPDATE on FastEthernet0/0 nbr 10.1.100.1 iidbQ un/rely 0/1 peerQ un/rely 0/0
*Jan 12 22:03:44.507: EIGRP: Requeued unicast on FastEthernet0/0
*Jan 12 22:03:44.511: EIGRP: Forcing multicast xmit on FastEthernet0/0
*Jan 12 22:03:44.515: EIGRP: Sending UPDATE on FastEthernet0/0 nbr 10.1.100.1
*Jan 12 22:03:44.519: AS 1, Flags 0x1, Seq 1/0 idbQ 3/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
*Jan 12 22:03:44.523: EIGRP: Enqueueing UPDATE on FastEthernet0/0 iidbQ un/rely0/1 serno 1-2
*Jan 12 22:03:44.527: EIGRP: Building Sequence TLV
*Jan 12 22:03:44.531: EIGRP: Enqueueing UPDATE on FastEthernet0/0 nbr 10.1.100.1 iidbQ un/rely 0/0 peerQ un/rely 0/1 serno 1-2
*Jan 12 22:03:44.535: EIGRP: Sending HELLO with Sequence TLV on FastEthernet0/0, seq 2
*Jan 12 22:03:44.587: EIGRP: Received Sequence TLV from 10.1.100.1
*Jan 12 22:03:44.591: 10.1.100.2
*Jan 12 22:03:44.591: address matched
*Jan 12 22:03:44.595: clearing CR-mode
*Jan 12 22:03:44.595: EIGRP: Received CR sequence TLV from 10.1.100.1, sequence2
*Jan 12 22:03:46.523: EIGRP: Sending UPDATE on FastEthernet0/0 nbr 10.1.100.1, retry 1, RTO 3000
*Jan 12 22:03:46.527: AS 1, Flags 0x1, Seq 1/1 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/2
*Jan 12 22:03:46.683: EIGRP: Received UPDATE on FastEthernet0/0 nbr 10.1.100.1
*Jan 12 22:03:46.687: AS 1, Flags 0x8, Seq 2/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/2
*Jan 12 22:03:46.843: EIGRP: Received ACK on FastEthernet0/0 nbr 10.1.100.1
*Jan 12 22:03:46.847: AS 1, Flags 0x0, Seq 0/1 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/2
*Jan 12 22:03:46.855: EIGRP: Sending UPDATE on FastEthernet0/0 nbr 10.1.100.1
*Jan 12 22:03:46.855: AS 1, Flags 0x8, Seq 2/2 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1 serno 1-2
*Jan 12 22:03:47.139: EIGRP: Received UPDATE on FastEthernet0/0 nbr 10.1.100.1
*Jan 12 22:03:47.143: AS 1, Flags 0x8, Seq 3/1 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
*Jan 12 22:03:47.147: EIGRP: Enqueueing ACK on FastEthernet0/0 nbr 10.1.100.1
*Jan 12 22:03:47.151: Ack seq 3 iidbQ un/rely 0/0 peerQ un/rely 1/1
*Jan 12 22:03:47.155: EIGRP: Sending ACK on FastEthernet0/0 nbr 10.1.100.1
*Jan 12 22:03:47.159: AS 1, Flags 0x0, Seq 0/3 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 1/1
*Jan 12 22:03:47.195: EIGRP: Received ACK on FastEthernet0/0 nbr 10.1.100.1
*Jan 12 22:03:47.199: AS 1, Flags 0x0, Seq 0/2 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
Maintenant un output des commandes de bases sur la visualisation de notre topologie EIGRP:
R1#sh ip int brief
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 10.1.100.1 YES manual up up
FastEthernet0/1 unassigned YES unset administratively down down
Serial1/0 10.1.200.1 YES manual up up
Loopback1 10.1.1.1 YES NVRAM up up
R1#sh ip ei neighbor
IP-EIGRP neighbors for process 1
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
1 10.1.100.2 Fa0/0 10 00:00:13 72 432 0 66
0 10.1.100.3 Fa0/0 10 00:00:14 233 1398 0 42
2 10.1.200.2 Se1/0 14 00:58:23 304 2280 0 65
R1#sh ip ei topology
IP-EIGRP Topology Table for AS(1)/ID(10.1.1.1)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 10.1.3.0/24, 1 successors, FD is 156160
via 10.1.100.3 (156160/128256), FastEthernet0/0
P 10.1.2.0/24, 1 successors, FD is 156160
via 10.1.100.2 (156160/128256), FastEthernet0/0
via 10.1.200.2 (40640000/128256), Serial1/0
P 10.1.1.0/24, 1 successors, FD is 128256
via Connected, Loopback1
P 192.168.100.0/24, 1 successors, FD is 156160
via 10.1.100.3 (156160/128256), FastEthernet0/0
P 10.1.100.0/24, 1 successors, FD is 28160
via Connected, FastEthernet0/0
P 10.1.200.0/24, 1 successors, FD is 40512000
via Connected, Serial1/0
R1#sh ip ei traffic
IP-EIGRP Traffic Statistics for AS 1
Hellos sent/received: 2265/2747
Updates sent/received: 70/57
Queries sent/received: 16/6
Replies sent/received: 7/21
Acks sent/received: 68/76
SIA-Queries sent/received: 0/0
SIA-Replies sent/received: 0/0
Hello Process ID: 236
PDM Process ID: 233
IP Socket queue: 0/2000/5/0 (current/max/highest/drops)
Eigrp input queue: 0/2000/5/0 (current/max/highest/drops)
R1#sh ip route eigrp
10.0.0.0/24 is subnetted, 5 subnets
D 10.1.3.0 [90/156160] via 10.1.100.3, 00:00:27, FastEthernet0/0
D 10.1.2.0 [90/156160] via 10.1.100.2, 00:00:26, FastEthernet0/0
D 192.168.100.0/24 [90/156160] via 10.1.100.3, 00:00:27, FastEthernet0/0
On voit que l’inteface serial à une bandwidth par défaut de 1544 kbit, alors qu’on l’a clocké à 64kbps.
Etant donnée que EIGRP utilise par défaut 50% max. de la bandwidth, notre lien risque d’être vite saturé.
C’est pourquoi nous allons ajouter la ligne de commande bandwidth à l’interface pour modifier celle-ci.
R1#show interfaces serial 1/0 Serial0/0/0 is up, line protocol is up Hardware is GT96K Serial Internet address is 10.1.200.1/24 MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 [...]
Etant donnée qu’EIGRP utilise par défaut 50% max. de la bandwidth, notre lien risque d’être vite saturé.
C’est pourquoi nous allons ajouter la ligne de commande bandwidth à l’interface pour modifier celle-ci.
R1(config)#interface Serial 1/0 R1(config-if)#bandwidth 64 R2(config)#interface Serial 1/0 R2(config-if)#bandwidth 64
R1#show interfaces serial 1/0 Serial0/0/0 is up, line protocol is up Hardware is GT96K Serial Internet address is 10.1.200.1/24 MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 [...] R2#show interfaces serial 1/0 Serial0/0/0 is up, line protocol is up Hardware is GT96K Serial Internet address is 10.1.200.2/24 MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, [...]
##########
##########
Nous allons pinger 10.1.1.1 depuis R3 et “shutter” l’interface f0/0 de R1 entre temps.
R3#sh ip ei topology
IP-EIGRP Topology Table for AS(1)/ID(10.1.3.1)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - R, r - reply Status, s - sia Status
P 10.1.3.0/24, 1 successors, FD is 128256
via Connected, Loopback3
P 10.1.2.0/24, 1 successors, FD is 156160
via 10.1.100.2 (156160/128256), FastEthernet0/0
P 10.0.0.0/8, 1 successors, FD is 28160
via Summary (28160/0), Null0
P 10.1.1.0/24, 1 successors, FD is 156160
via 10.1.100.1 (156160/128256), FastEthernet0/0
P 192.168.100.0/24, 1 successors, FD is 128256
via Summary (128256/0), Null0
P 192.168.100.0/30, 1 successors, FD is 128256
via Connected, Loopback11
P 10.1.100.0/24, 1 successors, FD is 28160
via Connected, FastEthernet0/0
P 10.1.200.0/24, 2 successors, FD is 40514560
via 10.1.100.1 (40514560/40512000), FastEthernet0/0
via 10.1.100.2 (40514560/40512000), FastEthernet0/0
Le successor de R3 pour 10.1.1.1 est 10.1.100.1 via la FastEthernet0/0.
Etant donnée qu’il n’y a pas de Feasible Successor (FD), R3 va devoir envoyer des paquets QUERY à ses voisins, et attendre de recevoir un REPLY avec une route. Le seul voisin restant à R3 étant R2, R2 enverra un paquet REPLY à R3, et R3 établira une nouvelle route vers 10.1.1.1 passant par R2, le lien série, puis R1.
Le débug suivant montre bien la table de routage de R1, ainsi que les Paquets EIGRP reçus par R2 pendant la convergence.
Output:
R1#sh ip route eigrp
10.0.0.0/24 is subnetted, 5 subnets
D 10.1.3.0 [90/156160] via 10.1.100.3, 00:16:37, FastEthernet0/0
D 10.1.2.0 [90/156160] via 10.1.100.2, 00:16:32, FastEthernet0/0
D 192.168.100.0/24 [90/156160] via 10.1.100.3, 00:16:37, FastEthernet0/0
R1#conf t
R1(config)#int f0/0
R1(config-if)#shut
*Jan 12 22:40:27.127: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 10.1.100.2 (FastEthernet0/0) is down: interface down
*Jan 12 22:40:27.159: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 10.1.100.3 (FastEthernet0/0) is down: interface down
*Jan 12 22:40:28.783: %LINK-5-CHANGED: Interface FastEthernet0/0, changed stateto administratively down
*Jan 12 22:40:28.787: %ENTITY_ALARM-6-INFO: ASSERT INFO Fa0/0 Physical Port Administrative State Down
*Jan 12 22:40:29.783: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down
R1(config-if)#do show ip route eigrp
10.0.0.0/24 is subnetted, 5 subnets
D 10.1.3.0 [90/40642560] via 10.1.200.2, 00:00:05, Serial1/0
D 10.1.2.0 [90/40640000] via 10.1.200.2, 00:00:06, Serial1/0
D 10.1.100.0 [90/40514560] via 10.1.200.2, 00:00:06, Serial1/0
D 192.168.100.0/24 [90/40642560] via 10.1.200.2, 00:00:05, Serial1/0
R2#deb eigrp packets
EIGRP Packets debugging is on
(UPDATE, REQUEST, QUERY, REPLY, HELLO, IPXSAP, PROBE, ACK, STUB, SIAQUERY, SIAREPLY)
[...]
*Jan 12 22:48:47.779: EIGRP: Received QUERY on Serial1/0 nbr 10.1.200.1
*Jan 12 22:48:47.783: AS 1, Flags 0x0, Seq 67/55 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
*Jan 12 22:48:47.803: EIGRP: Enqueueing REPLY on Serial1/0 nbr 10.1.200.1 iidbQun/rely 0/1 peerQ un/rely 0/0 serno 38-38
*Jan 12 22:48:47.819: EIGRP: Requeued unicast on Serial1/0
*Jan 12 22:48:47.827: EIGRP: Sending REPLY on Serial1/0 nbr 10.1.200.1
*Jan 12 22:48:47.831: AS 1, Flags 0x0, Seq 57/67 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1 serno 38-38
[...]
*Jan 12 22:48:57.759: EIGRP: Received QUERY on FastEthernet0/0 nbr 10.1.100.3
*Jan 12 22:48:57.759: AS 1, Flags 0x0, Seq 37/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
*Jan 12 22:48:57.791: EIGRP: Enqueueing REPLY on FastEthernet0/0 nbr 10.1.100.3 un/rely 0/1 peerQ un/rely 0/1 serno 42-42
*Jan 12 22:48:57.795: EIGRP: Requeued unicast on FastEthernet0/0
*Jan 12 22:48:58.091: EIGRP: Sending REPLY on FastEthernet0/0 nbr 10.1.100.3
[...]
R1(config-if)#no shut
*Jan 12 22:40:42.419: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 10.1.100.3 (FastEthernet0/0) is up: new adjacency
*Jan 12 22:40:42.595: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 10.1.100.2 (FastEthernet0/0) is up: new adjacency
*Jan 12 22:40:43.047: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
*Jan 12 22:40:43.051: %ENTITY_ALARM-6-INFO: CLEAR INFO Fa0/0 Physical Port Administrative State Down
*Jan 12 22:40:44.047: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
Sur ce schéma, vous pouvez voir que le traffic passe par R2, quand l’interface F0/0 de R1 est Down.
Voici le ping depuis R3 pendant tous ce temps, avec le nombre de paquets perdus pendant la convergence (QUERY/REPLY/Apprentissage de la nouvelle route).
R3#ping 10.1.1.1 rep 10000 Type escape sequence to abort. Sending 10000, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds: !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!...... *Jan 12 22:22:28.343: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 10.1. tEthernet0/0) is down: holding time expired.!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! *Jan 12 22:23:41.039: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 10.1. tEthernet0/0) is up: new adjacency.!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Demain, Labo sur EIGRP Load-Balancing, suivi de fiches théoriques sur EIGRP…
Benoit
Network engineer at CNS Communications. CCIE #47705, focused on R&S, Data Center, SD-WAN & Automation.
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6 Comments
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ca me rappel ma révision de CCNA!
Je vais probablement continuer encore un petit peu sous packet Tracert, a moins que tu m’aides un peu avec dynagen ;D
pas d’sparsemem, de ghostios et d’idlepc ?
amaylol! stop commentay tout le temps en même temps que toi!
@alex: ça marche sans !
@ML: On verra ça un de ces 4 !
Et c’est vrai que vous êtes mes plus fidèles commentateurs ! Merci.
au plaisir …
je suis tes tweets aussi!
merci pour l’astuce,je vais essayer ça! mais je vais savoir comment on relie 2reseaux differents sur 2fenetres differents de packet tracert pour que un ordi du 1er Rx dans la 1ere fenetre puisse pinguer un autre ordi du 2eme Rx de la 2eme fenetre merci bcp!!