EIGRP Fine Tunning
CCNA2 – Routing Protocols and Concepts
BSCI 2 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 1
Unequal cost load balancing
EIGRP, ca si restul protocoalelor de rutare suporta equal
load cost balancing;
rutele cu cost/metrica egala sunt folosite concomitent
pentru routing.
Spre deosebire fata de celelalte RP, EIGRP suporta si
unequal-cost load-balancing si mai mult de atat, fiecare
link este folosit in raport cu metrica proprie (deci nu in
procent de 50 – 50 %);
BSCI 2 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 2
Unequal cost load balancing
BSCI 2 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 3
Unequal cost load balancing
Unequal-cost load-balancing se realizeaza prin comanda
(config-router)#variance multiplier cu respectarea
urmatoarelor conditii:
- ruta care trebuie sa fie inclusa in RT pe langa ruta FD
sa fie ruta de backup (feasible succesor - RD<FD)
- metrica rutei pt. feasible succesor sa fie mai mica decat
FD * variance.
BSCI 2 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 4
Sumarizare manuala de rute
(config-if)# ip summary_address eigrp AS-NR RETEA MASCA
Un router EIGRP NU sumarizeaza automat retele in care nu
participa (nu are interfete direct conectate).
Nota → Pentru sumarizarea manuala, ruta sumarizata este
anuntata atata timp cat routerul va avea in tabela de rutare o
componenta (subretea) a acelei rute sumarizate!
BSCI 2 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 5
Redistribuire ruta default
//redistribuire ruta default
(config)#ip route 0.0.0.0 0.0.0.0 <192.168.0.1 / f0/1>
(config)#router eigrp 1
(config-router)#redistribute static
Ruta anuntata ca externa si marcata corespunzator!
D EX + DA = 170
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Redistribuire ruta default
(config)#ip route 0.0.0.0 0.0.0.0 s0/0
(config)#router eigrp 1
(config-router)#network 0.0.0.0
Se introduce in domeniul eigrp orice retea!
(network 0.0.0.0)!
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Redistribuire ruta default
(config)#int f0
(config-if)#ip summary-address eigrp NR-AS 0.0.0.0 0.0.0.0
Se controleaza usor directia in care se trimite ruta default!
De ex. se evita trimiterea acesteia catre core!
BSCI 2 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 8
Modificare hello-interval / hold-down
(config-if)#ip hello-interval eigrp 1 <1-65535>
(config-if)#ip hold-time eigrp 1 <1-65535>
Obs. O valoare hold-time setata local este transmisa prin hello vecinilor
adiacenti si este valabila in relatia dintre vecini si routerul local.
Routerul local trimite routerelor vecine intervalul de timp pt. care sa
rupa adiacenta in cazul in care routerul local nu trimite hello.
#show ip eigrp neighbors (data pe vecin)
#show ip eigrp interfaces detail (data local)
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Intrebari?
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