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Ở lab 1, chúng ta đã cấu hình cơ bản tính năng IRB trên router. Trong bài lab này, chúng ta sẽ thực hiện một bài lab nâng cao hơn để nắm rõ hơn về IRB. Sơ đồ như sau:
Chức năng IRB chỉ cấu hình trên các sub interface của R1 E0/0.20 và E0/0.30.
Các lệnh cấu hình:
Chức năng IRB chỉ cấu hình trên các sub interface của R1 E0/0.20 và E0/0.30.
Các lệnh cấu hình:
Code:
SW1(config)#[B]vlan 20[/B] SW1(config-vlan)#[B]name vlan20[/B] SW1(config-vlan)#[B]exit[/B] SW1(config)#[B]vlan 30[/B] SW1(config-vlan)[B]#name vlan30[/B] SW1(config-vlan)#[B]exit[/B] SW1(config)#[B]int e0/1[/B] SW1(config-if)#[B]switchport mode access[/B] SW1(config-if)#[B]switchport access vlan 20[/B] SW1(config-if)#[B]int e0/2[/B] SW1(config-if)#[B]switchport mode access[/B] SW1(config-if)#s[B]witchport access vlan 20[/B] SW1(config-if)#[B]int e0/3[/B] SW1(config-if)[B]#switchport mode access[/B] SW1(config-if)#[B]switchport access vlan 30[/B] SW1(config-if)[B]#exit[/B] SW1(config)#[B]int e0/0[/B] SW1(config-if)#[B]switchport trunk encapsulation dot1q[/B] SW1(config-if)#[B]switchport mode trunk[/B] SW1(config-if)#[B]exit[/B]
Code:
SW1#[B]show vlan brief[/B] VLAN Name Status Ports ---- -------------------------------- --------- - ------------------------------ 1 default active [B]20 vlan20 active Et0/1, Et0/2 30 vlan30 active Et0/3[/B] 1002 fddi-default act/unsup 1003 token-ring-default act/unsup 1004 fddinet-default act/unsup 1005 trnet-default act/unsup
Code:
R1(config)[B]#bridge irb[/B] R1(config)#[B]bridge 4 protocol ieee[/B] R1(config)#[B]bridge 4 route ip[/B] R1(config)#[B]int e0/0.20[/B] R1(config-subif)#[B]encapsulation dot1Q 20[/B] R1(config-subif)#[B]bridge-group 4[/B] R1(config-subif)#[B]int e0/0.30[/B] R1(config-subif)#[B]encapsulation dot1Q 30[/B] R1(config-subif)#[B]bridge-group 4[/B] R1(config-subif)#[B]exit[/B] R1(config)#[B]int e0/0[/B] R1(config-if)#[B]no shutdown[/B] R1(config-if)[B]#int bvi 4[/B] R1(config-if)#[B]ip add 10.0.1.1 255.255.255.0[/B] R1(config-if)#[B]exit[/B]
Code:
SW1#[B]show int trunk[/B] Port Mode Encapsulation Status Native vlan Et0/0 on 802.1q trunking 1 Port Vlans allowed on trunk Et0/0 1-4094 Port Vlans allowed and active in management domain Et0/0 1,20,30 Port Vlans in spanning tree forwarding state and not pruned Et0/0 1,20,30
Code:
SW1(config)#[B]int vlan 20[/B] SW1(config-if)#[B]ip add 10.0.0.20 255.255.255.0[/B] SW1(config-if)#[B]exit[/B]
Code:
R3(config)#[B]int e0/0[/B] R3(config-if)#i[B]p add 10.0.1.3 255.255.255.0[/B] R3(config-if)#[B]no shutdown[/B] R3(config-if)#[B]exit[/B]
Code:
R2(config)#[B]int e0/0[/B] R2(config-if)#[B]ip add 10.0.1.2 255.255.255.0[/B] R2(config-if)#[B]no shutdown[/B] R2(config-if)#[B]exit[/B]
Code:
R2#[B]ping 10.0.1.1[/B] Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.0.1.1, timeout is 2 seconds: *Oct 29 12:56:26.821: ether_vencap:(1975) .!!!!Success rate is 80 percent (4/5), round-trip min/avg/max = 2/2/3 ms
Code:
R2#[B]ping 10.0.1.3[/B] Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.0.1.3, timeout is 2 seconds: *Oct 29 12:56:34.852: ether_vencap:(1975) .!!!! Success rate is 80 percent (4/5), round-trip min/avg/max = 4/6/9 ms
Code:
R1#[B]show bridge[/B]
Total of 300 station blocks, 296 free
Codes: P - permanent, S - self
Bridge Group 4:
Address Action Interface Age RX count TX count
a284.eacc.2608 forward Et0/0.20 1 2 0
aabb.cc00.3000 forward Et0/0.20 1 8 4
aabb.cc00.4000 forward Et0/0.30 1 12 9
3e41.7b6e.69ce forward Et0/0.30 1 2 0
Code:
R1#[B]show int bvi 4[/B]
BVI4 is up, line protocol is up
Hardware is BVI, address is aabb.cc00.1000 (bia 0000.0000.0000)
Internet address is 10.0.1.1/24
MTU 1500 bytes, BW 10000 Kbit/sec, DLY 5000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/0 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
12 packets input, 936 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
6 packets output, 576 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
Code:
R1#[B]show bridge 4 verbose[/B] Total of 300 station blocks, 296 free Codes: P - permanent, S - self BG Hash Address Action Interface VC Age RX count TX count 4 2E/0 a284.eacc.2608 forward Et0/0.20 - 2 2 0 4 30/0 aabb.cc00.3000 forward Et0/0.20 - 0 9 4 4 40/0 aabb.cc00.4000 forward Et0/0.30 - 2 13 9 4 A7/0 3e41.7b6e.69ce forward Et0/0.30 - 2 2 0 Flood ports (BG 4) RX count TX count Ethernet0/0.20 2 2 Ethernet0/0.30 2 2
Code:
R1#[B]show arp[/B] Protocol Address Age (min) Hardware Addr Type Interface Internet 10.0.1.1 - aabb.cc00.1000 [B] ARPA BVI4[/B] Internet 10.0.1.2 3 aabb.cc00.4000 [B]ARPA BVI4[/B]