CCNA 13강 수업내용

@@ EIGRP(Enhanced Interior Gateway Routing Protocol)
=> IGRPv2, Cisco Protocol, PDM(IPv4, IPv6, IPX, Appletalk), Hybird

- 알고리즘 : DUAL(B.F+SPF)알고리즘 사용

- 정보수집 : EIGRP PDU

Hello : Neighbor를 발견, 인접 관계 형성
          Neighbor Table 생성 (Router#sh ip cigrip neighbot)

Update : Unicast를 통해 Neighbor와 Topology 동기화
             Topology Table 생성(Router#sh ip eigrp topology)
             Triggered Update(변경 즉시 업데이트)
             증분업데이트(변경된 정보만 업데이트)
Query : 경로가 제거된 경우 Neighbor 들에게 요청
Reply : Quey를 받은 Neighbor Replay로 응답
Ack : Updata, Quey, Reply에 대한 응답

- BestPath : Composite(Bandwidth + Delay)
- Metric(IGRP : 24bit) = 10^7(10000000)/Bandwidth + Delay * /10
- Metric(EIGRP : 32bit) = 10^7(10000000)/Bandwidth*256 + (Delay * 256) /10 

- Network 유지 : Hello Packet으로 Neighbor와 유지
                        Update : 5초, HoldTime : 15초

- 관리거리 : Internal = 90, External = 170

@EIGRP 설정방법
Router(config)#router eigrp <AS-Number>
Router(config-router)#auto-summary => Default로 Enable(Classfull Summary)
Router(config-router)#no auto-summary => auto-summary 기능 해재 이 기능 해제 후 관리자의 설정에 의해 Manual Summary(Classless) 가능
Router(config-router)#network <Classfull Network>
=> IOS Version 12.0 이전
Router(config-router)#network <Classfull Network> <Wildcardmask>
=> IOS Version 12.0 이후

Wildcardmask : 주소 범위지정
Subnet 지정
192.168.1.0 Subnet 지정
192.168.1.0. 255.255.255.0 : Subnetmask
192.168.1.0 0.0.0.255 : Wildcardmask

- 192.168.1.1 단일호스팅 지정
192.168.1.1 255.255.255.255 : Subnetmask
192.168.1.1 0.0.0.0 : Wildcardmaskt, 문자 : host 192.168.1.1

-모든 IP 주소 지정
0.0.0.0 0.0.0.0 : Subnetmask
0.0.0.0 255.255.255.25 : Wildcardmask, 문자 : any

@EIGRP Config
[capture 하기]
Dynagen => capture R1 s1/1 EIGRP.cap HDLC

R1 #sh ip route connect

R2 #sh ip route connect

R3 #sh ip route connect

R1
conf t
router eigrp 100
network 172.11.0.0 0.0.0.255
network 172.11.1.0 0.0.0.255
network 192.168.1.1 0.0.0.3
network 192.168.1.8 0.0.0.3
end

R2
conf t
router eigrp 100
network 172.12.0.0 0.0.0.0
network 192.168.1.0 0.0.0.3
end

R3
conf t
router eigrp 100
network 172.13.0.1 0.0.0.0
network 172.13.1.1 0.0.0.0
network 192.168.1.4 0.0.0.3
network 192.168.1.8 0.0.0.3
end

@Auto-summary 기능 해제

R1
conf t
router eigrp 100
no auto-summary
end

R2
conf t
router eigrp 100
no auto-summary
end

R3
conf t
router eigrp 100
no auto-summary
end

@Manual Summary

R1
conf t
int s1/0
ip summary-address eigrp 100 172.11.0.0 255.255.254.0
int s1/1
ip summary-address eigrp 100 172.11.0.0 255.255.254.0
end

R2
conf t
int s1/0
ip summary-address eigrp 100 172.12.0.0 255.255.254.0
int s1/1
ip summary-address eigrp 100 172.12.0.0 255.255.254.0
end

R3
conf t
int s1/0
ip summary-address eigrp 100 172.13.0.0 255.255.254.0
int s1/1
ip summary-address eigrp 100 172.13.0.0 255.255.254.0
end

@Default Route

R1
conf t
int lo 5
ip add 5.5.5.5 255.255.255.0
exit

R2#sh ip route
D 5.5.5.0/24 -> X
R2#ping 5.5.5.5
.....

R1
conf t
router eigrp 100
network 0.0.0.0 255.255.255.255
exit
ip route 0.0.0.0 0.0.0.0 lo 5

@Loadbalancing
- Equal Path : Metric값이 같을 때
R1#sh ip route
D       192.168.1.4 [90/2273792] via 192.168.1.10, 00:00:34, Serial1/1
                    [90/2273792] via 192.168.1.2, 00:00:34, Serial1/0
conf f
no ip cef
acceess-list 100 permit ip any 192.168.1.4 0.0.0.3
end
debug ip packet 100
R1#ping
Protocol [ip]:
Target IP address: 192.168.1.5
Repeat count [5]: 100
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]:
Sweep range of sizes [n]:

serial 1/1 => 50
serial 1/0 => 50

-Unequal Path : Metric값이 다를 때
R1
conf t
int s1/1
bandwidth 1024
end

R3
conf t
int s1/0
bandwidth 1024
end

R1#sh ip route
D       192.168.1.4 [90/2273792] via 192.168.1.2, 00:00:19, Serial1/0

R1
conf t
router eigrp 100
variance 2
end
R1#sh ip route
D       192.168.1.4 [90/3523840] via 192.168.1.10, 00:00:18, Serial1/1
                    [90/2273792] via 192.168.1.2, 00:00:18, Serial1/0

conf f
no ip cef
acceess-list 100 permit ip any 192.168.1.4 0.0.0.3
end
debug ip packet 100
R1#ping
Protocol [ip]:
Target IP address: 192.168.1.5
Repeat count [5]: 100
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]:
Sweep range of sizes [n]:

serial 1/0 : 61
serial 1/1 : 39

@EIGRP Authentication
R1
conf t
key chain ccna
key 1
key-string cisco
exit
exit
int s1/0
ip authentication key-chain eigrp 100 ccna
ip authentication mode eigrp 100 md5
end