hybrid замчлалын протокол eigrp Шинжлэх Ухаан Технологийн...

Hybrid замчлалын протоколEIGRP

Шинжлэх Ухаан Технологийн Их СургуульМэдээлэл, Холбооны Технологийн Сургууль

МЭДЭЭЛЛИЙН СҮЛЖЭЭНИЙ БАГ

ДЭД ПРОФЕССОР, ДОКТОР Л.ОДОНЧИМЭГ

Холбооны салбар, Мэдээллийн сүлжээ

Агуулга

Hybrid замчлалын протокол

EIRGP ажиллагаа

EIGRP метрик тооцоололт

DUAL ажиллагаа

Protocol-Dependent модуль

EIRGP тохиргоо

PROTOCOL-DEPENDENT МОДУЛЬ

Hybrid замчлалын протокол

EIGRP – Enhanced Interior Gateway Routing Protocol нь Сиско компаний өмчийн distance-vector protocol суурьтай link-state шинжийг агуулсан протокол юм.

EIGRP – ын онцлогууд:• Зөвхөн хөрш рүүгээ замын мэдээлэл дамжуулдаг – DV• 3 хүснэгт үүсгэдэг - LS• Fast convergence• Partial updates• Multiple network layer support – IP, IPX, APPLE TALKUse of multicast and unicast communication• Variable-length subnet masking (VLSM) support - CLASSLESS• Auto-summarization

EIRGP ажиллагаа(0)

Багцын төрөл ХэрэглээHello Ижил AS-ын дугаартай хөрш рутеруудыг

нээж олох үүрэгтэй Ethernet => hold-down time (15 сек)= hello time (5 сек) * 3

Acknowledgement EIGRP-ын аль нэг багцад хариу өгч баталгаажуулдаг

Update Хүлээн авагчийн сүлжээ хүртлэх замын мэдээллийг дамжуулдаг

Query Хөрш рутерээс замын өөрчлөлтийн талаарх мэдээлэл авах хүсэлт

Reply Хүсэлтийн хариу мессэж

Reliable Transport Protocol (RTP)EIGRP мессэжүүдийг дамжуулах үүрэгтэй. TCP-тэй ижил ажиллагаатай. ACK мессэжээр баталгаажуулдаг

EIRGP ажиллагаа(1)

EIRGP ажиллагаа(2)IP EIGRP Хөршийн хүснэгт

Хөршийн IP хаяг Хөршийн мэдээлэл

IP EIGRP Topology Table

Хүлээн авагчийн сүлжээ 1

FD / AD хөршөөс тодорхойлогдсон

IP Routing Table

Хүлээн авагчийн сүлжээ 1

Сайн зам

Шууд холбогдсон хөршүүдийн мэдээлэлR1# show ip eigrp neighbors

Хөршүүдээс суралцсан хамгийн боломжит сайн зам(successor) ба нөөц зам (feasible successor) уудын мэдээллийг хөрш рутеруудээсээ цуглуулдагR1# show ip eigrp topology

Хамгийн сайн боломжит замуудын жагсаалтR1# show ip route

Advertised Distance (AD) буюу Reported Distance (RD) нь хөрш рутерээс хүлээн авагчийн сүлжээ хүртлэх метрикFeasible Distance (FD) нь тухайн дотоод рутерээс хүлээн авагчийн сүлжээ хүртлэх метрик

EIRGP ажиллагаа(3)Router C-ийн хүснэгт:

EIGRP метрик тооцоололт (1)

EIGRP нь дараах параметруудыг ашиглан метрикээ тооцоолдог.

Параметр бүрт тооцоололтонд ашиглагдах эсэхээс хамаарч k1, k2, k3, k4, k5 утгуудыг олгодог

◦ Дефаултаар K1 (bandwidth) = 1, K3 (delay) = 1 ◦ K2 (load), K4 (reliability), K5 (MTU) = 0.

K утгуудыг өөрчлөх боломжтой:Router(config-router)# metric weights tos k1 k2 k3 k4 k5

Парамертуудыг шалгах команд: Router#show interface

EIGRP метрик тооцоололт (2)

Slowest bandwidth:

Plus the sum of the delays

EIGRP метрик тооцоололт (3) Bandwidth = 10,000,000 / 1024 = 9765 * 256 = 2499840

EIGRP метрик тооцоололт (4) Delay = 20,000 / 10 + (100 / 10) * 256 = 514560

EIGRP метрик тооцоололт (5) EIGRP Metric = 2499840 + 514560 = 3014400

DUAL ажиллагаа (0)

DUAL finite-state machine◦ Diffusing Update Algorithm (DUAL) нь хөршөөс ирсэн замуудаас хамгийн боломжит

сайн замыг сонгох үүрэгтэй

Passive Route• Тооцоологдсон зам /тогтвортой төлөвтэй/

Active route• Тооцоологдож байгаа зам /тогтворгүй төлөвтэй/


(1)

10.1.1.0 /24

A

C

B

E

D

(2) (2) (1)

(1)

(1)

EIGRP FD AD Topology

10.1.1.0 /24 3 ***** Passive *****

via B 3 1 Successor

via D 4 2 Feasible Successor

via E 4 3

Router CEIGRP FD AD Topology

10.1.1.0 /24 3 ***** Passive *****

via D 3 2 Successor

via C 4 3

Router E


10.1.1.0 /24 2 ***** Passive *****

via B 2 1 Successor

via C 5 3

Router D


(1)

10.1.1.0 /24

A

C

B

E

D

(2) (2) (1)

(1)

(1)


10.1.1.0 /24 3 ***** Passive *****

via B 3 1 Successor


via E 4 3


10.1.1.0 /24 3 ***** Passive *****

via D 3 2 Successor

via C 4 3

Router E


10.1.1.0 /24 2 ***** Passive *****

via B 2 1 Successor

via C 5 3

Router D


(1)

10.1.1.0 /24

A

C

B

E

D

(2) (2) (1)

(1)


10.1.1.0 /24 3 ***** Passive *****

via B 3 1 Successor


via E 4 3


10.1.1.0 /24 3 ***** Passive *****

via D 3 2 Successor

via C 4 3

Router E


10.1.1.0 /24 -1 ***** ACTIVE ******

via E (Q) Query

via C 5 3 (Q) Query

Router D

Q Q Q = Query


(1)

10.1.1.0 /24

A

C

B

E

D

(2) (2) (1)

(1)


10.1.1.0 /24 3 ***** Passive *****

via B 3 1 Successor

via D

via E 4 3


10.1.1.0 /24 -1 ***** ACTIVE ******

via D

via C 4 3 (Q) Query

Router E


10.1.1.0 /24 -1 ***** ACTIVE ******

via E (Q) Query

via C 5 3

Router D

R

Q

Q = Query

R = Reply


(1)

10.1.1.0 /24

A

C

B

E

D

(2) (2) (1)

(1)


10.1.1.0 /24 3 ***** Passive *****

via B 3 1 Successor

via D

via E


10.1.1.0 /24 4 ***** Passive *****

via C 4 3 Successor

via D

Router E


10.1.1.0 /24 -1 ***** ACTIVE ******

via E (Q) Query

via C 5 3

Router D

R

Q = Query

R = Reply


(1)

10.1.1.0 /24

A

C

B

E

D

(2) (2) (1)

(1)


10.1.1.0 /24 3 ***** Passive *****

via B 3 1 Successor

via D

via E


10.1.1.0 /24 4 ***** Passive *****

via C 4 3 Successor

via D

Router E


10.1.1.0 /24 5 ***** Passive *****

via C 5 3 Successor

via E 5 4 Successor

Router D

R

Q = Query

R = Reply


(1)

10.1.1.0 /24

A

C

B

E

D

(2) (2) (1)

(1)


10.1.1.0 /24 3 ***** Passive *****

via B 3 1 Successor

via D

via E


10.1.1.0 /24 4 ***** Passive *****

via C 4 3 Successor

via D

Router E


10.1.1.0 /24 5 ***** Passive *****

via C 5 3 Successor

via E 5 4 Successor

Router D

Protocol-Dependent модуль

Protocol-dependent modules (PDMs)Сүлжээний олон төрлийн протоколыг дэмждэг. Үүнд: IP, IPv6, AppleTalk, and Novell NetWare.

EIGRP Administrative Distance (AD) EIGRP default administrative distances

Routes manually summarized.

Routes redistributed into EIGRP.

МЭРГЭЖЛИЙН ЕРӨНХИЙ ДАДЛАГА

EIGRP тохиргоо (1)Рутер дээр EIGRP-ыг үүсгэх (AS дугаар ижил байх шаардлагатай)

Router(config)#router eigrp autonomous-system-id

Хөршүүд рүү зарлах сүлжээнүүдийг тохируулах

Router(config-router)#network network [mask]

Discontinuous сүлжээ байгаа тохиолдолд автоматаар нэгтгэх үйлдлийг цуцлах

Router(config-router)#no auto-summary

EIGRP update мессэжүүдийг интерфейсээр дамжуулахыг хориглох үүрэгтэй

Router(config-router)#passive-interface type number [default]

EIGRP тохиргоо: Classful

R1(config)# router eigrp 100R1(config-router)# network 192.168.1.96R1(config-router)# network 172.16.1.0R1(config-router)#

Classful configuration example:

R2(config)# router eigrp 100R2(config-router)# network 192.168.1.96R2(config-router)# network 172.17.2.0*Jul 26 10:02:25.963: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.101 (Serial0/0/0) is

up: new adjacency 172.17.2.0R2(config-router)# R2#

Fa0/0Fa0/0

R1 R2

172.16.1.0 /24

EIGRP AS 100

Internet192.168.1.0 /27

S0/0/1

172.17.2.0 /24

S0/0/0S0/0/0

64 kbps192.168.1.96 /27

.101.102 .1

.1.1


R1# show running-config | section router eigrprouter eigrp 100 network 172.16.0.0 network 192.168.1.0 auto-summaryR1# 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, 00:24:02, Serial0/0/0 172.16.0.0/16 is variably subnetted, 2 subnets, 2 masksD 172.16.0.0/16 is a summary, 00:25:27, Null0C 172.16.1.0/24 is directly connected, FastEthernet0/0 192.168.1.0/24 is variably subnetted, 3 subnets, 2 masksC 192.168.1.96/27 is directly connected, Serial0/0/0D 192.168.1.0/27 [90/41024000] via 192.168.1.102, 00:16:56, Serial0/0/0D 192.168.1.0/24 is a summary, 00:25:27, Null0R1#


Fa0/0Fa0/0

R1 R2

172.16.1.0 /24

EIGRP AS 100

Internet192.168.1.0 /27

S0/0/1

172.17.2.0 /24

S0/0/0S0/0/0

64 kbps192.168.1.96 /27

.101.102 .1

.1.1


R2# show running-config | section router eigrprouter eigrp 100 network 172.17.0.0 network 192.168.1.0 auto-summaryR2# show ip route<output omitted>Gateway of last resort is not set

172.17.0.0/16 is variably subnetted, 2 subnets, 2 masksD 172.17.0.0/16 is a summary, 00:13:10, Null0C 172.17.2.0/24 is directly connected, FastEthernet0/0D 172.16.0.0/16 [90/40514560] via 192.168.1.101, 00:13:26, Serial0/0/0 192.168.1.0/24 is variably subnetted, 3 subnets, 2 masksC 192.168.1.96/27 is directly connected, Serial0/0/0C 192.168.1.0/27 is directly connected, Serial0/0/1D 192.168.1.0/24 is a summary, 00:13:10, Null0R2#


Fa0/0Fa0/0

R1 R2

172.16.1.0 /24

EIGRP AS 100

Internet192.168.1.0 /27

S0/0/1

172.17.2.0 /24

S0/0/0S0/0/0

64 kbps192.168.1.96 /27

.101.102 .1

.1.1


R2# show ip protocolsRouting Protocol is "eigrp 100"<output omitted> Automatic network summarization is in effect Automatic address summarization: 192.168.1.0/24 for FastEthernet0/0 Summarizing with metric 40512000 172.17.0.0/16 for Serial0/0/0, Serial0/0/1 Summarizing with metric 28160 Maximum path: 4 Routing for Networks: 172.17.0.0 192.168.1.0 Routing Information Sources:<output omitted>R2#


Fa0/0Fa0/0

R1 R2

172.16.1.0 /24

EIGRP AS 100

Internet192.168.1.0 /27

S0/0/1

172.17.2.0 /24

S0/0/0S0/0/0

64 kbps192.168.1.96 /27

.101.102 .1

.1.1

EIGRP тохиргоо: Classless

Classless configuration example:R2(config)# no router eigrp 100R2(config)# router eigrp 100R2(config-router)# network 192.168.1.96 0.0.0.31R2(config-router)# network 172.17.2.0 0.0.0.255R2(config-router)# no auto-summaryR2# show run | section router eigrprouter eigrp 100 network 172.17.2.0 0.0.0.255 network 192.168.1.96 0.0.0.31R2#

Fa0/0Fa0/0

172.17.2.0 /24

R1 R2

172.16.1.0 /24

EIGRP AS 100

Internet192.168.1.0 /27

64 kbps192.168.1.96 /27

.101.102

S0/0/1

S0/0/0S0/0/0

.1

.1.1

R1(config)# no router eigrp 100R1(config)# router eigrp 100R1(config-router)# network 192.168.1.96 0.0.0.31R1(config-router)# network 172.16.1.0 0.0.0.255R1(config-router)# no auto-summaryR1# show run | section router eigrprouter eigrp 100 network 172.16.1.0 0.0.0.255 network 192.168.1.96 0.0.0.31R1#


R2# show ip protocolsRouting Protocol is "eigrp 100"<output omitted>Automatic network summarization is in effect Automatic address summarization: 192.168.1.0/24 for FastEthernet0/0 Summarizing with metric 40512000 172.17.0.0/16 for Serial0/0/0 Summarizing with metric 28160 Maximum path: 4 Routing for Networks: 172.17.2.0/24 192.168.1.96/27 Routing Information Sources: Gateway Distance Last Update (this router) 90 00:00:06 Gateway Distance Last Update 192.168.1.101 90 00:00:26 Distance: internal 90 external 170


Fa0/0Fa0/0

R1 R2

172.16.1.0 /24

EIGRP AS 100

Internet192.168.1.0 /27

S0/0/1

172.17.2.0 /24

S0/0/0S0/0/0

64 kbps192.168.1.96 /27

.101.102 .1

.1.1


R1# show ip protocols

Routing Protocol is "eigrp 100"

<output omitted>

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

Automatic network summarization is in effect

Automatic address summarization:

192.168.1.0/24 for FastEthernet0/0

Summarizing with metric 40512000

172.16.0.0/16 for Serial0/0/0

Summarizing with metric 28160

Maximum path: 4

Routing for Networks:

172.16.1.0/24

192.168.1.96/27

Routing Information Sources:

Gateway Distance Last Update

(this router) 90 00:08:56

Gateway Distance Last Update

192.168.1.102 90 00:07:59

Distance: internal 90 external 170

Verify routing protocol information on the router.

Passive-Interface Example

R1(config)# router eigrp 100R1(config-router)# passive-interface fa0/0R1(config-router)#

R2(config)# router eigrp 100R2(config-router)# passive-interface fa0/0R2(config-router)#

Alternate configuration:R1(config)# router eigrp 100R1(config-router)# passive-interface defaultR1(config-router)# no passive-interface S0/0/0

R2(config)# router eigrp 100R2(config-router)# passive-interface defaultR2(config-router)# no passive-interface S0/0/0

Fa0/0Fa0/0

R1 R2

172.16.1.0 /24

EIGRP AS 100

Internet192.168.1.0 /27

172.17.2.0 /24

64 kbps192.168.1.96 /27

.101.102

S0/0/1

S0/0/0S0/0/0

.1

.1.1

Default Route замыг зарлах Automatic Summarization идэвхгүй болгох EIGRP Load Balancing

PROTOCOL-DEPENDENT МОДУЛЬ

Default Route замыг зарлах

Хоёр арга ашиглах боломжтой:ip default-network network-number global configuration command.

эсвэл ip route 0.0.0.0 0.0.0.0 next-hop | interface

ip default-network жишээ

Fa0/0Fa0/0

R1 R2

172.16.1.0 /24

64 kbps

EIGRP AS 100

Internet

172.31.0.0 /16192.168.1.96 /27

172.17.2.0 /24

.101.102

S0/0/1

S0/0/0S0/0/0

.1

.1.1 192.168.1.0 /27

.2

R2(config)# ip route 172.31.0.0 255.255.0.0 192.168.1.2R2(config)# do ping 172.31.0.0<output omitted>Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 msR2(config)# ip default-network 172.31.0.0R2(config)# router eigrp 100R2(config-router)# redistribute staticR2(config-router)# endR2#

ip default-network жишээ

R2# show ip route<output omitted>Gateway of last resort is 192.168.1.2 to network 172.31.0.0<output omitted>S* 172.31.0.0/16 [1/0] via 192.168.1.2 192.168.1.0/27 is subnetted, 2 subnetsC 192.168.1.96 is directly connected, Serial0/0/0C 192.168.1.0 is directly connected, Serial0/0/1R2#

Fa0/0Fa0/0

R1 R2

172.16.1.0 /24

64 kbps

EIGRP AS 100

Internet

172.31.0.0 /16192.168.1.96 /27

172.17.2.0 /24

.101.102

S0/0/1

S0/0/0S0/0/0

.1

.1.1 192.168.1.0 /27

.2

R1# show ip route<output omitted>Gateway of last resort is 192.168.1.102 to network 172.31.0.0<output omitted.D*EX 172.31.0.0/16 [170/41024000] via 192.168.1.102, 00:00:20, Serial0/0/0 192.168.1.0/27 is subnetted, 1 subnetsC 192.168.1.96 is directly connected, Serial0/0/0R1#

ip route 0.0.0.0 0.0.0.0 interface жишээ

Fa0/0Fa0/0

R1 R2

172.16.1.0 /24

64 kbps

EIGRP AS 100

Internet

172.31.0.0 /16192.168.1.96 /27

172.17.2.0 /24

.101.102

S0/0/1

S0/0/0S0/0/0

.1

.1.1 192.168.1.0 /27

.2

R2(config)# ip route 0.0.0.0 0.0.0.0 S0/0/1R2(config)# router eigrp 100R2(config-router)# network 0.0.0.0R2(config-router)# do show ip route<output omitted>Gateway of last resort is 0.0.0.0 to network 0.0.0.0

172.17.0.0/16 is variably subnetted, 2 subnets, 2 masksD 172.17.0.0/16 is a summary, 03:13:25, Null0C 172.17.2.0/24 is directly connected, FastEthernet0/0D 172.16.0.0/16 [90/40514560] via 192.168.1.101, 03:13:25, Serial0/0/0 192.168.1.0/27 is subnetted, 2 subnetsC 192.168.1.96 is directly connected, Serial0/0/0C 192.168.1.0 is directly connected, Serial0/0/1S* 0.0.0.0/0 is directly connected, Serial0/0/1R2(config-router)#

ip route 0.0.0.0 0.0.0.0 interface жишээ

Fa0/0Fa0/0

R1 R2

172.16.1.0 /24

64 kbps

EIGRP AS 100

Internet

172.31.0.0 /16192.168.1.96 /27

172.17.2.0 /24

.101.102

S0/0/1

S0/0/0S0/0/0

.1

.1.1 192.168.1.0 /27

.2

R2(config)# ip route 0.0.0.0 0.0.0.0 192.168.1.2R2(config)# router eigrp 100R2(config-router)# network 0.0.0.0R2(config-router)# redistribute staticR2(config-router)# do show ip route<output omitted>Gateway of last resort is 192.168.1.2 to network 0.0.0.0

172.17.0.0/16 is variably subnetted, 2 subnets, 2 masksD 172.17.0.0/16 is a summary, 02:53:48, Null0C 172.17.2.0/24 is directly connected, FastEthernet0/0D 172.16.0.0/16 [90/40514560] via 192.168.1.101, 02:53:48, Serial0/0/0 192.168.1.0/27 is subnetted, 2 subnetsC 192.168.1.96 is directly connected, Serial0/0/0C 192.168.1.0 is directly connected, Serial0/0/1S* 0.0.0.0/0 [1/0] via 192.168.1.2R2(config-router)#

Discontiguous сүлжээнүүдийн нэгтгэх үйлдэл

R1 R2

10.10.10.0 /24

EIGRP AS 100

192.168.1.96 /30 10.20.20.0 /24

EIGRP Update: Connected to 10.0.0.0 /8

R1# show running-config | section router eigrprouter eigrp 100 passive-interface FastEthernet0/0 network 10.10.10.0 0.0.0.255 network 192.168.1.96 0.0.0.31 auto-summaryR1# show ip protocolsRouting Protocol is "eigrp 100"<output omitted> Automatic network summarization is in effect Automatic address summarization: 10.0.0.0/8 for Serial0/0/0 Summarizing with metric 28160 Maximum path: 4 Routing for Networks: 10.10.10.0/24 192.168.1.96/27 Passive Interface(s): FastEthernet0/0 <output omitted>

Discontiguous сүлжээнүүдийн нэгтгэх үйлдэл

R2# show ip route<output omitted>Gateway of last resort is 192.168.1.2 to network 0.0.0.0

10.0.0.0/8 is variably subnetted, 2 subnets, 2 masksC 10.20.20.0/24 is directly connected, FastEthernet0/0D 10.0.0.0/8 is a summary, 00:13:35, Null0 192.168.1.0/27 is subnetted, 2 subnetsC 192.168.1.96 is directly connected, Serial0/0/0C 192.168.1.0 is directly connected, Serial0/0/1S* 0.0.0.0/0 [1/0] via 192.168.1.2 R2#

R1 R2

10.10.10.0 /24

EIGRP AS 100

192.168.1.96 /30 10.20.20.0 /24


R2 ignores the R1 update because it is already

connected to the classful 10.0.0.0/8 network.

Automatic Summarization идэвхгүй болгох

R1 R2

10.10.10.0 /24

EIGRP AS 100

192.168.1.96 /30 10.20.20.0 /24


R1(config)# router eigrp 100R1(config-router)# no auto-summaryR1(config-router)#*Jul 26 22:14:07.183: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.102 (Serial0/0/0) is resync: summary configuredR1(config-router)# endR1# show ip protocolsRouting Protocol is "eigrp 100“<output omitted>Automatic network summarization is not in effect Maximum path: 4 Routing for Networks: 10.10.10.0/24 192.168.1.96/27<output omitted>

Automatic Summarization идэвхгүй болгох

R1 R2

10.10.10.0 /24

EIGRP AS 100

192.168.1.96 /30 10.20.20.0 /24


R2(config)# router eigrp 100R2(config)# no auto-summaryR2(config)# endR2# show ip route<output omitted>Gateway of last resort is 192.168.1.2 to network 0.0.0.0

10.0.0.0/24 is subnetted, 2 subnetsC 10.20.20.0 is directly connected, FastEthernet0/0D 10.10.10.0 [90/40514560] via 192.168.1.101, 00:05:21, Serial0/0/0 192.168.1.0/27 is subnetted, 2 subnetsC 192.168.1.96 is directly connected, Serial0/0/0C 192.168.1.0 is directly connected, Serial0/0/1S* 0.0.0.0/0 [1/0] via 192.168.1.2R2#

ip summary-address eigrp

Гараар нэгтгэх үйлдэл

Router(config-if)#

ip summary-address eigrp as-number address mask [admin-distance]

Fa0/0Fa0/0

R1 R2

10.10.10.0 /24

EIGRP AS 100WAN

192.168.3.1

S0/0/0

10.10.20.0 /24

10.0.0.0 /8

R3

R1(config)# router eigrp 100R1(config)# no auto-summary

R2(config)# router eigrp 100R2(config)# no auto-summary

R3(config)# interface S0/0/0R3(config-if)# ip address 192.168.3.1 255.255.255.0R3(config-if)# ip summary-address eigrp 1 10.10.0.0 255.255.0.0R3(config-if)# no shutR3(config-if)# exitR3# show ip protocolsRouting Protocol is "eigrp 100"<output omitted>Automatic network summarization is not in effect Address Summarization: 10.10.0.0/16 for Serial0/0/0<output omitted>

EIGRP Load Balancing

Load Balancing тохируулах • equal-cost load balancing

• Router(config-eigrp)#maximum-paths 3 (default=4)• Show ip protocols

• Unequal-cost load balancing • Router(config-router)# variance 2 (default=1)

EIGRP Equal-Cost Load Balancing

R1(config)# router eigrp 100R1(config-router)# network 172.16.1.0 0.0.0.255R1(config-router)# network 192.168.1.0R1(config-router)# network 192.168.2.0R1(config-router)# network 192.168.3.0R1(config-router)# network 192.168.4.0R1(config-router)# maximum–paths 3R1(config-router)#

R1 Topology Table

Advertised Distance (AD)

Network Neighbor AD FD

172.16.2.0/24 R2 20 40

R3 20 40

R4 20 40

R5 20 40

EIGRP Unequal-Cost Load Balancing

R1(config)# router eigrp 100R1(config-router)# variance 2R1(config-router)#

R1 Topology Table

Advertised Distance (AD)

Network Neighbor AD FD

172.16.2.0/24 R2 10 30

R3 10 20

R4 25 45

R5 10 50

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