มาเรียนรู้การคำนวณ IP Address version 4 ด้วยเทคนิคการใช้ตารางมหัศจรรย์ซึ่งทำให้ศิษย์นำไปใช้ในการทำงานและการสอบ Cert.IT ได้อย่างดีเยี่ยม
Basic Linux Command ตอนที่ 1 (ls,cat,vi)by Jodoi
มาเรียนรู้การใช้ Linux Command เบื้องต้นกันครับ เริ่มต้นด้วย command ls , cat และ vi ซึ่งปัจจุบันมีความจำเป็นต้องเรียนรู่อย่างยิ่งเพราะหลายๆองค์กรมีการใช้ Linux Server กันมากขึ้น
1.1) ให้ทำการตรวจสอบ Config Routing OSPF โดยใช้ค่า Process ID = 100 , Area-ID = 0
ถ้าทำถูกต้องที่ Router Jodoi-B1 ต้องเป็นดังนี้
Jodoi-B1#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 12 subnets, 4 masks
C 10.10.10.0/26 is directly connected, GigabitEthernet0/2
L 10.10.10.62/32 is directly connected, GigabitEthernet0/2
C 10.10.10.64/30 is directly connected, GigabitEthernet0/0
L 10.10.10.65/32 is directly connected, GigabitEthernet0/0
C 10.10.10.68/30 is directly connected, GigabitEthernet0/1
L 10.10.10.69/32 is directly connected, GigabitEthernet0/1
C 10.10.10.72/30 is directly connected, Serial0/0/0
L 10.10.10.73/32 is directly connected, Serial0/0/0
O 10.10.10.76/30 [110/2] via 10.10.10.66, 00:16:14, GigabitEthernet0/0
O 10.10.10.80/30 [110/2] via 10.10.10.70, 00:13:05, GigabitEthernet0/1
O 10.10.10.84/30 [110/66] via 10.10.10.66, 00:06:44, GigabitEthernet0/0
[110/66] via 10.10.10.70, 00:06:44, GigabitEthernet0/1 O 10.10.10.128/25 [110/3] via 10.10.10.66, 00:00:37, GigabitEthernet0/0
[110/3] via 10.10.10.70, 00:00:37, GigabitEthernet0/1
Jodoi-B1#
Jodoi-B1#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 12 subnets, 4 masks
C 10.10.10.0/26 is directly connected, GigabitEthernet0/2
L 10.10.10.62/32 is directly connected, GigabitEthernet0/2
C 10.10.10.64/30 is directly connected, GigabitEthernet0/0
L 10.10.10.65/32 is directly connected, GigabitEthernet0/0
C 10.10.10.68/30 is directly connected, GigabitEthernet0/1
L 10.10.10.69/32 is directly connected, GigabitEthernet0/1
C 10.10.10.72/30 is directly connected, Serial0/0/0
L 10.10.10.73/32 is directly connected, Serial0/0/0
O 10.10.10.76/30 [110/4] via 10.10.10.66, 00:02:40, GigabitEthernet0/0
O 10.10.10.80/30 [110/4] via 10.10.10.70, 00:02:21, GigabitEthernet0/1
O 10.10.10.84/30 [110/4] via 10.10.10.74, 00:01:57, Serial0/0/0 O 10.10.10.128/25 [110/5] via 10.10.10.74, 00:01:57, Serial0/0/0
[110/5] via 10.10.10.66, 00:01:57, GigabitEthernet0/0
[110/5] via 10.10.10.70, 00:01:57, GigabitEthernet0/1
Jodoi-B1#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 12 subnets, 4 masks
C 10.10.10.0/26 is directly connected, GigabitEthernet0/2
L 10.10.10.62/32 is directly connected, GigabitEthernet0/2
C 10.10.10.64/30 is directly connected, GigabitEthernet0/0
L 10.10.10.65/32 is directly connected, GigabitEthernet0/0
C 10.10.10.68/30 is directly connected, GigabitEthernet0/1
L 10.10.10.69/32 is directly connected, GigabitEthernet0/1
C 10.10.10.72/30 is directly connected, Serial0/0/0
L 10.10.10.73/32 is directly connected, Serial0/0/0
D 10.10.10.76/30 [90/3072] via 10.10.10.66, 00:00:15, GigabitEthernet0/0
D 10.10.10.80/30 [90/3072] via 10.10.10.70, 00:00:12, GigabitEthernet0/1 D 10.10.10.84/30 [90/2170368] via 10.10.10.66, 00:00:15, GigabitEthernet0/0
[90/2170368] via 10.10.10.70, 00:00:12, GigabitEthernet0/1
D 10.10.10.128/25 [90/3328] via 10.10.10.66, 00:00:15, GigabitEthernet0/0
[90/3328] via 10.10.10.70, 00:00:12, GigabitEthernet0/1
Jodoi-B1#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 12 subnets, 4 masks
C 10.10.10.0/26 is directly connected, GigabitEthernet0/2
L 10.10.10.62/32 is directly connected, GigabitEthernet0/2
C 10.10.10.64/30 is directly connected, GigabitEthernet0/0
L 10.10.10.65/32 is directly connected, GigabitEthernet0/0
C 10.10.10.68/30 is directly connected, GigabitEthernet0/1
L 10.10.10.69/32 is directly connected, GigabitEthernet0/1
C 10.10.10.72/30 is directly connected, Serial0/0/0
L 10.10.10.73/32 is directly connected, Serial0/0/0
D 10.10.10.76/30 [90/3072] via 10.10.10.66, 00:00:02, GigabitEthernet0/0
D 10.10.10.80/30 [90/3072] via 10.10.10.70, 00:00:01, GigabitEthernet0/1 D 10.10.10.84/30 [90/2170368] via 10.10.10.66, 00:00:02, GigabitEthernet0/0
[90/2681856] via 10.10.10.74, 00:00:04, Serial0/0/0
[90/2170368] via 10.10.10.70, 00:00:01, GigabitEthernet0/1
D 10.10.10.128/25 [90/3328] via 10.10.10.66, 00:00:02, GigabitEthernet0/0
[90/3328] via 10.10.10.70, 00:00:01, GigabitEthernet0/1
Jodoi-B1#
หมายเหตุ ให้ใช้ command # show ip eigrp topology ช่วยนะครับ
จะเห็นว่ามี 3 เส้นทาง
Jodoi-B1#show ip eigrp topology
IP-EIGRP Topology Table for AS 222
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - Reply status
P 10.10.10.64/30, 1 successors, FD is 2816
via Connected, GigabitEthernet0/0
P 10.10.10.68/30, 1 successors, FD is 2816
via Connected, GigabitEthernet0/1
P 10.10.10.0/26, 1 successors, FD is 2816
via Connected, GigabitEthernet0/2
P 10.10.10.72/30, 1 successors, FD is 2169856
via Connected, Serial0/0/0 P 10.10.10.84/30, 3 successors, FD is 2170368
via 10.10.10.66 (2170368/2170112), GigabitEthernet0/0
via 10.10.10.70 (2170368/2170112), GigabitEthernet0/1
via 10.10.10.74 (2681856/2169856), Serial0/0/0
P 10.10.10.76/30, 1 successors, FD is 3072
via 10.10.10.66 (3072/2816), GigabitEthernet0/0
P 10.10.10.80/30, 1 successors, FD is 3072
via 10.10.10.70 (3072/2816), GigabitEthernet0/1
P 10.10.10.128/25, 2 successors, FD is 3328
via 10.10.10.66 (3328/3072), GigabitEthernet0/0
via 10.10.10.70 (3328/3072), GigabitEthernet0/1