1 repeater bridge router gateway
V.S OSI
Repeater(Hub) 1
Repeater 2
3 (
Hub 4
Bridge 1
Bridge 2 N N DL1 DL1 DL2 DL2 Ph1 Ph1 Ph2 Ph2 1 2
Bridge 3 MAC Ethernet FDDI MAC MAC
Bridge 4
5
6
7 50873EA6, 00123456 10173846, 1017385A 00123456 04125456 10173856 1017385A 1 2 3 4 501C3dD56 50173E56 508C3dD5B 50873EA6 00123456, 50873EA6 00123456 1 50873EA6 4 1017385A 2
8 B1 B2 A 1 B1 2 B MAC PORT A 1 A 2 B 2 B 1 MAC PORT A 1 A 2 B 2 B 1 1 2 B2
9 LAN spanning tree
10 spanning tree) spanning tree)
11 1-4s Hello
12 B A C 2 1 D 4 3 5 6 F E G
12 A C 2 5 F 1 D 4 E 3 6 B G B A C 2 1 D 4 3 5 6 F E G
1
2 100M 10M 100M 100M 10M 10M Hub Hub
-VLAN 3 MAC IP
-VLAN 4?
-VLAN 5
zw2-1>show vlan VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------ 1 default active 100 ggq active Gi1/0/1, Gi1/0/2, Gi1/0/3 Gi1/0/4, Gi1/0/5, Gi1/0/6 Gi1/0/7, Gi1/0/8, Gi1/0/26 200 wgx active Gi1/0/11, Gi1/0/12, Gi1/0/13 Gi1/0/14, Gi1/0/15, Gi1/0/16 300 ljz active Gi1/0/17, Gi1/0/18, Gi1/0/19 Gi1/0/20, Gi1/0/21, Gi1/0/22 Gi1/0/23, Gi1/0/24, Gi1/0/27 Gi1/0/28 540 VLAN0540 active Gi1/0/9, Gi1/0/10 1002 fddi-default act/unsup 1003 token-ring-default act/unsup 1004 fddinet-default act/unsup 1005 trnet-default act/unsup VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2 ---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
-VLAN 6
Router 1
Router 2
Router 3
Router 4 Routing protocol Routing Protocol Routing Algorithms Network information Route table Route lookup
Router 5
Router 6
Router 7
Router 8
Gateway
2. $ Internet Computer Computer
2. UNIVERSITY Server Computer Computer Laptop institute
how forward Route routing? Windows Route netstat
Destination Next-hop flag Interface 127.0.0.0 127.0.0.1 UH lo0 default 140.252.1.4 UG le0 140.252.13.35 140.252.1.183 UHG le0 202.112.11.0 140.252.1.183 UG le0
Active Routes: Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 211.65.59.1 211.65.59.60 1 127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1 211.65.59.0 255.255.255.0 211.65.59.60 211.65.59.60 1 211.65.59.60 255.255.255.255 127.0.0.1 127.0.0.1 1 211.65.59.255 255.255.255.255 211.65.59.60 211.65.59.60 1 224.0.0.0 224.0.0.0 211.65.59.60 211.65.59.60 1 255.255.255.255 255.255.255.255 211.65.59.60 211.65.59.60 1 Default Gateway: 211.65.59.1
routing table
routing table
Other routers Routing protocol D_routing Routing protocol Network info. routing algorithm Routing Protocol Routing Algorithms Network information Use network info. Create routes. Route table Route lookup
A 1 2 5 B D 2 3 1 3 ISPa C E 1 5 2 F RIP OSPF BGP A 1 2 5 B 2 D 3 1 3 ISPb C E 1 5 2 F
RIP Route information protocol rfc1388
OSPF open shortest path first rfc1247
BGP Border gateway protocol rfc1267
Distance vector Hops Link state combined attributes
Distance vector Hops D-V)
A
A C A?
D-V D-V
R1 R2 R3 Net1-1 Net1 - Net1-1 Net1-1 Net1 R1 2 Net1-2 Net1-1 Net1 R1 2 Net1 R2 3
NET1
R1 R2 R3 Net1 - Net1 R1 2 Net1 R2 3 1 Net1 R2 3 Net1 R1 2 Net1 R2 3 2 Net1 R2 3 Net1 R1 4 Net1 R2 3 3 Net1 R2 5 Net1 R1 4 Net1 R2 5 4 Net1 R2 5 Net1 R1 6 Net1 R2 5
C B B
Link state Hello
Dijkstra Repeat the above two steps
A
Dijkstra
3.
3.
3.
3.
3.
3.
3.
3.
3.
BGP AS 100 R1 AS 200 IGP IGP IGP IGP IGP EGP R2 IGP IGP IGP EGP EGP R3 H1 IGP IGP H2 IGP AS 300 IGP EGP IGP
3. lookup match
3. CIDR QoS based routing Muticast routing
3.
3.
3.
Lan OSPF CIDR
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