//R1
enable
conf t
hostname R1
int s1/0
no sh
encap fram
no fram inverse
clock rate 64000
int lo 0
ip add 1.1.1.1 255.255.255.0
do show frame-relay pvc | include DLCI
int s1/0.1 m
ip add 1.1.11.1 255.255.255.0
ip ospf hello-interval 10
fram map ip 1.1.11.2 102 br
fram map ip 1.1.11.3 103 br
int f0/0
no sh
ip add 1.1.17.1 255.255.255.0
int f0/1
no sh
ip add 1.1.18.1 255.255.255.0
router ospf 1
router-id 1.1.1.1
network 1.1.11.1 0.0.0.0 area 11
network 1.1.1.1 0.0.0.0 area 0
network 1.1.17.1 0.0.0.0 area 0
network 1.1.18.1 0.0.0.0 area 0
//R2
enable
conf t
hostname R2
int s1/0
no sh
encap fram
no fram inverse
clock rate 64000
do show frame-relay pvc | include DLCI
int s1/0.2 p
ip add 1.1.11.2 255.255.255.0
fram inter 201
int lo0
ip add 1.1.2.2 255.255.255.0
router ospf 1
router-id 1.1.2.2
network 1.1.2.2 0.0.0.0 area 11
network 1.1.12.2 0.0.0.0 area 11
//R3
enable
conf t
hostname R3
int s1/0
no sh
encap fram
no fram inverse
clock rate 64000
do show frame-relay pvc | include DLCI
int s1/0.3 p
ip add 1.1.11.3 255.255.255.0
fram inter 301
int lo0
ip add 1.1.3.3 255.255.255.0
router ospf 1
router-id 1.1.3.3
network 1.1.3.3 0.0.0.0 area 11
network 1.1.11.3 0.0.0.0 area 11
//SW1
enable
conf t
hostname SW1
vlan 100
int range f1/1 - 2
sw tr en do
sw mo tr
channel-group 1 mode on
do sh eth summary
int vlan 100
ip add 1.1.79.7 255.255.255.0
int lo0
ip add 1.1.7.7 255.255.255.0
int f1/0
no switchport
ip add 1.1.17.7 255.255.255.0
int f1/10
no switchport
ip add 1.1.78.7 255.255.255.0
router ospf 1
router-id 1.1.7.7
network 1.1.7.7 0.0.0.0 area 0
network 1.1.17.7 0.0.0.0 area 0
network 1.1.78.7 0.0.0.0 area 0
network 1.1.79.7 0.0.0.0 area 78
//SW3
enable
conf t
hostname SW3
vlan 100
int range f1/1 - 2
sw tr en do
sw mo tr
channel-group 1 mode on
do sh eth summary
int lo0
ip add 1.1.9.9 255.255.255.0
int vlan 100
ip add 1.1.79.9 255.255.255.0
router ospf 1
router-id 1.1.9.9
network 1.1.9.9 0.0.0.0 area 78
network 1.1.79.9 0.0.0.0 area 78
//SW2
enable
conf t
hostname SW2
vlan 100
int range f1/1 - 2
sw mo ac
sw ac vlan 100
channel-group 2 mode on
do sh eth summary
int vlan 100
ip add 1.1.108.8 255.255.255.0
int lo0
ip add 1.1.8.8 255.255.255.0
int f1/0
no switchport
ip add 1.1.18.8 255.255.255.0
int f1/10
no switchport
ip add 1.1.78.8 255.255.255.0
router ospf 1
router-id 1.1.8.8
network 1.1.18.8 0.0.0.0 area 0
network 1.1.78.8 0.0.0.0 area 0
network 1.1.8.8 0.0.0.0 area 0
network 1.1.108.8 0.0.0.0 area 108
//SW4
enable
conf t
hostname SW4
vlan 100
int range f1/1 - 2
sw mo ac
sw ac vlan 100
channel-group 2 mode on
do sh eth summary
int vlan 100
ip add 1.1.108.10 255.255.255.0
int lo0
ip add 1.1.10.10 255.255.255.0
router ospf 1
router-id 1.1.10.10
network 1.1.10.10 0.0.0.0 area 108
network 1.1.108.10 0.0.0.0 area 108
ena
conf t
no ip domain lookup
line c 0
exec-timeout 0
logg sy
exit
host
SW1,2,3,4
vlan 100
exit
SW1(config)#do show cdp neigh
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater
Device ID Local Intrfce Holdtme Capability Platform Port ID
SW2 Fas 1/10 145 R S I 3660 Fas 1/10
SW3 Fas 1/2 145 R S I 3660 Fas 1/2
SW3 Fas 1/1 145 R S I 3660 Fas 1/1
SW1(config)#int range f1/1 - 2
SW1(config-if-range)#sw tr enc dot
SW1(config-if-range)#sw mo tr
SW1(config-if-range)#channel-group 1 mode on
SW3(config)#do show cdp neigh
Device ID Local Intrfce Holdtme Capability Platform Port ID
SW1 Fas 1/2 122 R S I 3660 Fas 1/2
SW1 Fas 1/1 122 R S I 3660 Fas 1/1
SW3(config)#int range f1/1 - 2
SW3(config-if-range)#sw tr enc dot
SW3(config-if-range)#sw mo tr
SW3(config-if-range)#channel-group 1 mode on
SW2(config)#do show cdp neigh
Device ID Local Intrfce Holdtme Capability Platform Port ID
SW4 Fas 1/2 148 R S I 3660 Fas 1/2
SW4 Fas 1/1 148 R S I 3660 Fas 1/1
SW1 Fas 1/10 176 R S I 3660 Fas 1/10
SW2(config)#int range f1/1 - 2
SW2(config-if-range)#sw mode access
SW2(config-if-range)#sw acc vlan 100
SW2(config-if-range)#channel-group 2 mode on
SW4(config)#do show cdp neig
Device ID Local Intrfce Holdtme Capability Platform Port ID
SW2 Fas 1/2 151 R S I 3660 Fas 1/2
SW2 Fas 1/1 151 R S I 3660 Fas 1/1
SW4(config)#int range f1/1 - 2
SW4(config-if-range)#sw mode access
SW4(config-if-range)#sw acc vlan 100
SW4(config-if-range)#channel-group 2 mode on
SW1#show ether summary
Group Port-channel Ports
-----+------------+-----------------------------------------------------------
1 Po1(SU) Fa1/1(P) Fa1/2(P)
SW2#show ether summary
Flags: D - down P - in port-channel
I - stand-alone s - suspended
R - Layer3 S - Layer2
U - in use
Group Port-channel Ports
-----+------------+-----------------------------------------------------------
2 Po2(SU) Fa1/1(P) Fa1/2(P)
SW3#show ether summary
Group Port-channel Ports
-----+------------+-----------------------------------------------------------
1 Po1(SU) Fa1/1(P) Fa1/2(P)
SW4#show ether summary
Group Port-channel Ports
-----+------------+-----------------------------------------------------------
2 Po2(SU) Fa1/1(P) Fa1/2(P)
//cdp neighbor 모를경우
SW1(config)#cdp run
R1(config)#int f0/1
R1(config-if)#no shut
R1(config-if)#int f0/0
R1(config-if)#no shut
SW1(config)#do show cdp neigh
Device ID Local Intrfce Holdtme Capability Platform Port ID
SW2 Fas 1/10 148 R S I 3660 Fas 1/10
SW3 Fas 1/2 160 R S I 3660 Fas 1/2
SW3 Fas 1/1 160 R S I 3660 Fas 1/1
R1 Fas 1/0 149 R S I 3660 Fas 0/0
SW1(config)#int f1/0
SW1(config-if)#no sw
SW1(config-if)#ip add 1.1.17.7 255.255.255.0
SW1(config-if)#exit
SW1(config)#do show cdp neigh
Device ID Local Intrfce Holdtme Capability Platform Port ID
SW2 Fas 1/10 167 R S I 3660 Fas 1/10
SW3 Fas 1/2 179 R S I 3660 Fas 1/2
SW3 Fas 1/1 179 R S I 3660 Fas 1/1
R1 Fas 1/0 168 R S I 3660 Fas 0/0
SW1(config)#int f1/10
SW1(config-if)#no sw
SW1(config-if)#ip add 1.1.78.7 255.255.255.0
SW1(config)#int f1/0
SW1(config-if)#no sw
SW1(config-if)#ip add 1.1.17.7 255.255.255.0
SW1(config-if)#exit
SW1(config)#int vlan 100 //svi에 ip넣기
SW1(config-if)#ip add 1.1.79.7 255.255.255.0
SW1(config-if)#int loo0
SW1(config-if)#ip add 1.1.7.7 255.255.255.0
SW2(config)#cdp run
SW2(config)#int loo0
SW2(config-if)#ip add 1.1.8.8 255.255.255.0
SW2(config-if)#int vlan 100 //L2니까 no switchport 할 필요없다.
SW2(config-if)#ip add 1.1.108.8 255.255.255.0
맥이 낮은게 루트가 된다.
백본쪽에있는게 루트가 된다. (33분쯤) 아님 priority를 강제로 줘야함.
SW2(config-if)#do show cdp neigh
Device ID Local Intrfce Holdtme Capability Platform Port ID
SW4 Fas 1/2 146 R S I 3660 Fas 1/2
SW4 Fas 1/1 146 R S I 3660 Fas 1/1
SW1 Fas 1/10 165 R S I 3660 Fas 1/10
R1 Fas 1/0 170 R S I 3660 Fas 0/1
SW2(config-if)#int f1/10
SW2(config-if)#no switchport
SW2(config-if)#ip add 1.1.78.8 255.255.255.0
SW2(config-if)#exit
SW2(config-if)#do show cdp nei
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater
Device ID Local Intrfce Holdtme Capability Platform Port ID
SW4 Fas 1/2 120 R S I 3660 Fas 1/2
SW4 Fas 1/1 120 R S I 3660 Fas 1/1
SW1 Fas 1/10 120 R S I 3660 Fas 1/10
R1 Fas 1/0 134 R S I 3660 Fas 0/1
SW2(config-if)#int f1/0
SW2(config-if)#no swi
SW2(config-if)#ip add 1.1.18.8 255.255.255.0
SW2(config-if)#do show ip route
1.0.0.0/24 is subnetted, 4 subnets
C 1.1.8.0 is directly connected, Loopback0
C 1.1.18.0 is directly connected, FastEthernet1/0
C 1.1.78.0 is directly connected, FastEthernet1/10
C 1.1.108.0 is directly connected, Vlan100
SW3(config)#int lo0
SW3(config-if)#ip add 1.1.9.9 255.255.255.0
SW3(config-if)#int vlan 100
SW3(config-if)#ip add 1.1.79.9 255.255.255.0
SW3(config-if)#do show ip route
1.0.0.0/24 is subnetted, 2 subnets
C 1.1.9.0 is directly connected, Loopback0
C 1.1.79.0 is directly connected, Vlan100
SW4(config)#int loo0
SW4(config-if)#ip add 1.1.10.10 255.255.255.0
SW4(config-if)#int vlan 100
SW4(config-if)#ip add 1.1.108.10 255.255.255.0
SW4(config-if)#do show ip route
1.0.0.0/24 is subnetted, 2 subnets
C 1.1.10.0 is directly connected, Loopback0
C 1.1.108.0 is directly connected, Vlan100
R1(config-if)#int s1/0
R1(config-if)#no shut
R1(config-if)#int s1/0
R1(config-if)# no sh
R1(config-if)# encap fram
R1(config-if)# no fram inverse
R1(config-if)# clock rate 64000
R1(config-if)#int s1/0.1 m
R1(config-subif)# ip add 1.1.11.1 255.255.255.0
R1(config-subif)# fram map ip 1.1.11.2 102 br
R1(config-subif)# fram map ip 1.1.11.3 103 br
R1(config-if)# int lo0
R1(config-if)# ip add 1.1.1.1 255.255.255.0
do show cdp neigh
R1(config-if)# int f0/0
R1(config-if)# ip add 1.1.17.1 255.255.255.0
R1(config-if)# int f0/1
R1(config-if)# ip add 1.1.18.1 255.255.255.0
R1(config-if)#do show ip route
R2(config)# int s1/0
R2(config-if)# no sh
R2(config-if)# encap fram
R2(config-if)# no fram inverse
R2(config-if)# clock rate 64000
R2(config-if)# int s1/0.2 p
R2(config-subif)# ip add 1.1.11.2 255.255.255.0
R2(config-subif)# fram inter 201
R2(config-fr-dlci)# int lo0
R2(config-if)# ip add 1.1.2.2 255.255.255.0
R2(config-if)#do show ip route
1.0.0.0/24 is subnetted, 2 subnets
C 1.1.2.0 is directly connected, Loopback0
C 1.1.11.0 is directly connected, Serial1/0.2
R3(config)#int s1/0
R3(config-if)# no sh
R3(config-if)# encap fram
R3(config-if)# no fram inverse
R3(config-if)# clock rate 64000
R3(config-if)# int s1/0.3 p
R3(config-subif)# ip add 1.1.11.3 255.255.255.0
R3(config-subif)# fram inter 301
R3(config-fr-dlci)# int lo0
R3(config-if)# ip add 1.1.3.3 255.255.255.0
낯선장비 안에 DLCI값이 어떤지 모른다. 모르는게 정상이다.
그럼 LMI를 통해서 알수있다. 프레임릴레이 직접가지 않고!
do show frame-relay pvc | include DLCI
//프레임릴레이가 부산에 있다고했을때, DLCI값을 부산에있는 노트북을 띄어보지않고 알 수 있는것!
R1(config-subif)#do show frame-relay pvc | include DLCI
DLCI = 102, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1/0.1
DLCI = 103, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1/0.1
R3(config-if)#do show frame-relay pvc | include DLCI
DLCI = 301, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1/0.3
DLCI = 302, DLCI USAGE = UNUSED, PVC STATUS = ACTIVE, INTERFACE = Serial1/0
R2(config-if)#do show frame-relay pvc | include DLCI
DLCI = 201, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1/0.2
DLCI = 203, DLCI USAGE = UNUSED, PVC STATUS = ACTIVE, INTERFACE = Serial1/0
SW1(config-if)# router ospf 1
SW1(config-router)# router-id 1.1.7.7
SW1(config-router)# network 1.1.7.7 0.0.0.0 area 0
SW1(config-router)# network 1.1.17.7 0.0.0.0 area 0
SW1(config-router)# network 1.1.78.7 0.0.0.0 area 0
SW1(config-router)# network 1.1.79.7 0.0.0.0 area 78
SW2(config-if)# router ospf 1
SW2(config-router)# router-id 1.1.8.8
SW2(config-router)# network 1.1.18.8 0.0.0.0 area 0
SW2(config-router)# network 1.1.78.8 0.0.0.0 area 0
SW2(config-router)# network 1.1.8.8 0.0.0.0 area 0
SW2(config-router)# network 1.1.108.8 0.0.0.0 area 108
SW3(config)# router ospf 1
SW3(config-router)# router-id 1.1.9.9
SW3(config-router)# network 1.1.9.9 0.0.0.0 area 78
SW3(config-router)# network 1.1.79.9 0.0.0.0 area 78
SW4(config-if)# router ospf 1
SW4(config-router)# router-id 1.1.10.10
SW4(config-router)# network 1.1.10.10 0.0.0.0 area 108
SW4(config-router)# network 1.1.108.10 0.0.0.0 area 108
R1(config-subif)# router ospf 1
R1(config-router)# router-id 1.1.1.1
R1(config-router)# network 1.1.11.1 0.0.0.0 area 11
R1(config-router)# network 1.1.1.1 0.0.0.0 area 0
R1(config-router)# network 1.1.17.1 0.0.0.0 area 0
R1(config-router)# network 1.1.18.1 0.0.0.0 area 0
R2(config-if)# router ospf 1
R2(config-router)# router-id 1.1.2.2
R2(config-router)# network 1.1.2.2 0.0.0.0 area 11
R2(config-router)# network 1.1.11.2 0.0.0.0 area 11
R3(config-if)# router ospf 1
R3(config-router)# router-id 1.1.3.3
R3(config-router)# network 1.1.3.3 0.0.0.0 area 11
R3(config-router)# network 1.1.11.3 0.0.0.0 area 11
근데 R1,2,3는 neighbor를 안맺는다. 왜? p-to-p 와 p-to-multi 인터페이스 타입이 틀리기 때문에!
do show ip ospf int s1/0
R1(config)#do show ip ospf int s1/0.1
Serial1/0.1 is up, line protocol is up
Internet Address 1.1.11.1/24, Area 11
Process ID 13, Router ID 1.1.1.1, Network Type NON_BROADCAST, Cost: 64 //NBMA다
R3(config)#do show ip ospf int s1/0.3
Serial1/0.3 is up, line protocol is up
Internet Address 1.1.11.3/24, Area 11
Process ID 13, Router ID 1.1.3.3, Network Type POINT_TO_POINT, Cost: 64
//p-to-p는 hello가 10초고, p-to-multi 는 hello가 30초다. hello가 다르면 neighbor를 맺지 않는다.
//hello가 같더라도 DR를 뽑는애들끼리, 안뽑는애들끼리만 neighbor을 맺는다.
//최적의 컨버젼스 타임을 갖게하려 neighbor을 최대한 빨리 맺게하라는 뜻.
//wait타임 없는것. p-to-p와 p-to-multi가 wait타임 없다.
Dead time = Wait time
컨버젼스 타임이란 = 갱신 기간
DR을 안뽑게되면 Hello의 4배를 절약하게 된다.
show frame-relay pvc | include DLCI
R2 R3는 p-to-p로 간다.
multi는 nbma로 인식하고 p-to-p는 로 인식한다.
R1(config)#int s1/0.1
R1(config-subif)#ip ospf net point-to-m //p-to-p는 안됨. R1에 R2와 R3가 연결되어있으니까!
R1(config-subif)#ip ospf hello-interval 10
//이러면 neighbor를 자동으로 맺는다.
R1(config-router)#do show ip route
1.0.0.0/8 is variably subnetted, 13 subnets, 2 masks
O IA 1.1.10.10/32 [110/3] via 1.1.18.8, 03:05:30, FastEthernet0/1
O IA 1.1.9.9/32 [110/3] via 1.1.17.7, 03:05:30, FastEthernet0/0
O 1.1.8.8/32 [110/2] via 1.1.18.8, 03:05:30, FastEthernet0/1
O 1.1.7.7/32 [110/2] via 1.1.17.7, 03:05:30, FastEthernet0/0
O 1.1.3.3/32 [110/65] via 1.1.11.3, 03:05:15, Serial1/0.1
O 1.1.2.2/32 [110/65] via 1.1.11.2, 03:05:25, Serial1/0.1
C 1.1.1.0/24 is directly connected, Loopback0
C 1.1.11.0/24 is directly connected, Serial1/0.1
C 1.1.17.0/24 is directly connected, FastEthernet0/0
C 1.1.18.0/24 is directly connected, FastEthernet0/1
O 1.1.78.0/24 [110/2] via 1.1.18.8, 03:05:31, FastEthernet0/1
[110/2] via 1.1.17.7, 03:05:31, FastEthernet0/0
O IA 1.1.79.0/24 [110/2] via 1.1.17.7, 03:05:35, FastEthernet0/0
O IA 1.1.108.0/24 [110/2] via 1.1.18.8, 03:05:35, FastEthernet0/1
//32bit 이상한 애들 어떻게 잡음?
//모든 loopback 0 에다가 ip ospf net point-to-point 넣어줌.
R1,2,3 SW1,2,3,4
#int loo0
#ip ospf net point-to-point
OSPF Metric공식 = 10^8(1억)/BW
SW1에서
1.1.9.0로는 200M/bps 로 가야하고
1.1.8.0로는 100M/bps 로 가야하는데
SW1(config-if)#do show ip rou
O 1.1.8.0/24 [110/2] via 1.1.78.8, 00:00:57, FastEthernet1/10
O 1.1.9.0/24 [110/2] via 1.1.79.9, 00:01:27, Vlan100
[신뢰도/목적지까지 가기위한 OSPF Metric]
Metric 두배가 차이나야하는데 똑같다....(왼쪽은 Ether-Channel, 오른쪽은 한가닥...(?)). 엔지니어라면 이런걸 유심히 볼수있는 눈이 있어야함.
SW1#show cdp nei
Device ID Local Intrfce Holdtme Capability Platform Port ID
SW2 Fas 1/10 147 R S I 3660 Fas 1/10
SW3 Fas 1/2 177 R S I 3660 Fas 1/2
SW3 Fas 1/1 177 R S I 3660 Fas 1/1
R1 Fas 1/0 161 R S I 3660 Fas 0/0
SW1#show int f1/10
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
SW1#show ip int brie
Interface IP-Address OK? Method Status Protocol
Port-channel1 unassigned YES unset up up
SW1#show int port-channel 1 //논리적으로 묶은 포트 조회.
MTU 1500 bytes, BW 200000 Kbit/sec, DLY 1000 usec
SW1#show int vlan 100 //SVI 조회
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
SW1,2
#bandwidth 200000 //200,000으로 바꿔줌.
#do show int vlan 100
MTU 1500 bytes, BW 200000 Kbit/sec, DLY 100 usec
SW1(config-if)#do show ip route
O 1.1.8.0/24 [110/2] via 1.1.78.8, 00:34:31, FastEthernet1/10
O 1.1.9.0/24 [110/2] via 1.1.79.9, 00:35:01, Vlan100
//하지만 아직 변하지 않았다...
//1,000,000/1,000,000 = 1
//1,000,000/2,000,000 = 0.5 = 1
//결국 1이기 때문.
//분자를 높이자.
//
이럴 경우 OSPF 기준 대역폭을 증가시켜야 한다.
OSPF설정모드에서 auto-cost reference-bandwidth 명령어를 사용.
★Mbis per second 는 M = 10^6이다.★
//
//SW1,2,3,4 모두에게 router ospf 1에다가 BW 1000을준다.
#router ospf 1
#auto-cost reference-bandwidth 1000(0000)
% OSPF: Reference bandwidth is changed.
Please ensure reference bandwidth is consistent across all routers.
SW1,2
#clear ip ospf process
#Reset ALL OSPF processes? [no]: y
이더채널이 더 빠르게 됨.
또한, 인터페이스에서 cost를 직접 바꿀 수 있다.
ip ospf cost ?
<1-65535> cost
//수업시간엔 왜 이방법을 안썼지...?
os 7 layer가 있고
ibm의 sma 가 있다 => ip 주소체계를 안쓴다.
먼저 브릿지 그룹을 만들어야한다.
SW1(config)#bridge 1 protocol vlan-bridge
SW1(config)#interface vlan 100
SW1(config-if)#bridge-group 1
SW1(config-if)#exit
SW1(config)#int f1/10
SW1(config-if)#bridge-group 1
R1(config)#router ospf 1
R1(config-router)#area 11 stub no-summary
R2(config-router)#router ospf 1
R2(config-router)#area 11 stub
R3#clear ip route *
R3#sho ip route
디폴트 빼고 다 싹사라짐
R3#show logging
Syslog logging: enabled (11 messages dropped, 0 messages rate-limited,
0 flushes, 0 overruns, xml disabled, filtering disabled)
No Active Message Discriminator.
No Inactive Message Discriminator.
Console logging: level debugging, 42 messages logged, xml disabled, //현재 화면에 띄어져있는 로긴메시지
filtering disabled
Monitor logging: level debugging, 0 messages logged, xml disabled, //다른 장비의 화면을 띄울수있다.
filtering disabled
Buffer logging: disabled, xml disabled, // 메모리에 저장되어있는 것을 버퍼 로깅이라고한다.
filtering disabled
Logging Exception size (4096 bytes)
Count and timestamp logging messages: disabled
Persistent logging: disabled
R3(config)#logging console ? //숫자가 낮을수록 심각하다...
<0-7> Logging severity level
alerts Immediate action needed (severity=1)
critical Critical conditions (severity=2)
debugging Debugging messages (severity=7)
discriminator Establish MD-Console association
emergencies System is unusable (severity=0)
errors Error conditions (severity=3)
filtered Enable filtered logging
guaranteed Guarantee console messages
informational Informational messages (severity=6)
notifications Normal but significant conditions (severity=5)
warnings Warning conditions (severity=4)
xml Enable logging in XML
//0번은 이멀전씨다. 매우 심각...!!!
R3(config)#int s1/0
R3(config-if)#sh
R3(config-if)#
*Mar 1 03:11:48.583: %LINK-5-CHANGED: //level5 다.
R3(config-if)#logging console 4
R3(config)#int s1/0
R3(config-if)#shu
R3(config-if)#no shut
R3(config-if)#
*Mar 1 03:12:44.331: %LINK-3-UPDOWN: Interface Serial1/0, changed state to up //no shut은 심각도가 3
logging console 뒤에 숫자를 넣어주면 그 숫자보다 더 심각한 상태일때만 콘솔창에 표시해준다.
7번이 기본값이다.
5번 - 2
R3(config)#logging buffered 8192
//화면의 심각도에 따라 콘솔창에 뿌릴지 말지 정할수있다.
5번 - 3
R3(config)#logging ?
count Count every log message and timestamp last occurrence
R3(config)#logging count
R1
문제 b.
logging buffered 8192 3 //이렇게하면 1하고 3이 한번에 뿌려짐
문제 c.
service timestamps log datetime
문제 d.
logging count
//logging console의 기본값은 7
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