宽带IP网案例分析

Unified Networks Solution -宽带IP解决方案
Michael Chang Independent Network Consultant
4th March - 0

Agenda
企业级IP解决方案
新一代IP宽带解决方案成功案例分析
Proposal - March 14, 1999- 1

企业级IP解决方案园区骨干的设计思想
园区接入的设计思想企业级WAN的设计
Proposal - March 14, 1999- 2

LAN 技术选择
(ATM or Giga-Ethernet?)
10/100/1000 BASE-T 交换技术
— 安装容易且投资便宜, 对客户以前的网络投资保护. — 技术成熟, 安装, 调试及管理容易. — 标准的虚拟网划分协议:802.1Q — QOS - RSVP — 对多媒体的支持有限-Network Parameter
ATM 技术
— 极低的延迟和延迟变化 — 固有的Qos 支持(端-端) — 通过局域网仿真集成ATM及现有局域网 — 标准的虚拟网划分协议(局域网仿真－仿真LAN) — 路由成为瓶颈
Proposal - March 14, 1999- 3

网络设计方案
(Giga-Ethernet)
2*100M
五楼
2*100M
四楼
Access Layer IDF Desk Stack Switches
2*100M 2*100M
五楼
三楼
2*100M
五楼 Access Layer
2*100M 2*100M
二楼四楼 Access Layer IDF Desk Stack Switches
IDF Desk Stack Switches
2*100M
四楼
2*100M
三楼
2*100M
2*100M
一楼 Server Family
三楼
2*100M
B楼
2*100M
二楼
二楼
1G(UP to 4G) 1G(UP to 4G)
Backbone Layer
2*100M
一楼
1G(UP to 4G)
Server Family
2*100M
一楼
Server Family
A楼
Private WAN/Internet
Router
C楼
Proposal - March 14, 1999- 4

Advanced applications
Are you ready ?
Talk to me Videolink
Company Results News from the VP - Real Audio Marrakech Presentation - Active X
Intranet Traffic Peer-to-Peer Traffic Mission Critical Applications
Intranet Servers
Proposal - March 14, 1999- 5

Routing switch evolution
Risers Risers
Routing Switch Traditional Switch
Gigabit
IP Forwa rding
Gigabit
Traditional Router
Traditional Router
IP Forwa rding
WAN
WAN
Proposal - March 14, 1999- 6

路由交换机的演变
传统的路由器
路由交换机 (Gigabit Ethernet)
注意:在交换机中插入一个路由模块并不是路由交换机!
功能
第二层交换机 (Fast Ethernet)
性能
Proposal - March 14, 1999- 7

Routing Switches Flexibility
R Switch R Switch R Switch
1. Out of the box, it is a blazing L2 switch
2. Configure it to route and/or switch on any port
3. Or, configure it to route on all ports
R VLAN VLAN
R VLAN VLAN
R Switch
4. Create VLANs by policy or by port
5. Route between VLANs with simple software configuration
6. Or any configuration that suites your needs
Proposal - March 14, 1999- 8

Wire-speed Routing
distributed processing
Address Table (MAC & IP) Ethernet Interface
I/O Card
ARU
To I/O Card
Queue Manager
To I/O Card
ARU
To I/O Card
Memory
Distributed ASICs per I/O card
Address Table (MAC & IP)
Route Learning via System Processor
To CPU
Forwarding takes <6 microsec!
Queue Manager
To I/O Card
Switch Fabric
System Processor
To I/O Card
I/O Card
ARU
Memory
Queue Manager
To I/O Card
Ethernet Interface
Memory Memory
Memory
Switch Fabric
100% Hardware Forwarding
Address Table (MAC & IP)
Ethernet Interface
I/O Card
Proposal - March 14, 1999- 9

Distributed, scalable hardware-based architecture
Table Update
Distributed ASICs per I/O card
I/O Card
Address Table (MAC & IP)
I/O Card
Address Table (MAC & IP)
Ethernet Interface
ARU
To I/O Card
Queue Manager
To I/O Card
Memory
Centralized Switch Fabric & CPU card
ARU
To I/O Card
Table Update
Queue Manager
To I/O Card
15Gbps Shared Memory Switch Fabric >7Gbps Throughput
RIP Update
To CPU
PowerPC RISC
To I/O Card
RIP Information
= RIP Update
ARU
Address Table (MAC & IP)
Memory
Queue Manager
To I/O Card
Ethernet Interface
Memory Memory
Memory
Silicon Switch Fabric (SSF) Card
Learning via RISC Processor
100% Hardware Forwarding
Table Update
I/O Card
Ethernet Interface
Proposal - March 14, 1999- 10

企业级IP解决方案
园区骨干的设计思想
园区接入的设计思想
企业级WAN的设计
Proposal - March 14, 1999- 11

接入层的交换机

分级接入：接入方式的设计:
— 性能：Desktop: 10M 、10/100M Uplink :100M 、N*100M 、GigaEther — 密度和扩展性 12/24 or More-是否堆叠？ — 功能 802.1Q VLAN support MultiLink Trunking support Stackable and Redundant
与路由交换机组合，可形成完美的解决方案
— 802.1Q VLAN — MultiLink Trunking
Proposal - March 14, 1999- 12

堆叠交换机:
性能、密度、功能、可靠
MultiLink Trunking 提供高带宽
和冗余
— 负载均担，与服务器的冗余连接 — 负载均担，与网络中心的冗余连接
冗余的堆叠能力
— 冗余堆叠设计
Dual homing to
可热插拔的交换机支持电源冗余 (RPSU) 802.1Q VLAN,802.1p,IGMP
snooping...
MultiLink Trunking to Core switches at the network center
local servers and mission-critical PCs with multiple-port NICs
Proposal - March 14, 1999- 13

企业级IP解决方案
园区骨干的设计思想园区接入的设计思想
企业级WAN的设计
Proposal - March 14, 1999- 14

A Total Solution……….
Branch Office Business Partners
VPN Routing:
Tunnel on demand Branch Office routes Simultaneous connections for Mobile Users.
Contivity Extanet Switch
Suppliers
Intranet Router Mobile User Using IPSec or PPTP Tunnel Client Internet Branch Office
Directory Security Server
Firewall Certificate Authority
Proposal - March 14, 1999- 15

Competition
Bay
Branch to Branch Free Client Software Tunneling Protocols:
Cisco
Yes N/A No No Yes No Yes No No Yes No No No
3Com
Yes N/A No Yes Yes Yes No No Yes Yes No No No
Ascend
Yes No Yes No Yes Yes No No Yes Yes Yes No No
Shiva
Yes No Yes No No No Yes No Yes Yes Yes No No
Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Ipsec
PPTP L2TP
User Authentication:
RADIUS
X.509 NT SecurID Encryption: DES Triple DES RC4 Flexible Configuration by group: LDAP
Yes Yes Yes
Proposal - March 14, 1999- 16

Agenda
企业级IP解决方案
新一代IP宽带解决方案语音(Voice Over Data)解决方案
4th March - 17

网络层次图
OC48/POSX4或OPTera 80(DWDM)
Versalar 45000
Versalar45000: 10Gbps连接速度 1.4Tbps容量 32Tbps的背板
DWDM 环
Versalar 45000
核心主干
Versalar 45000
Accelar 8000: 256G背板 2.5Gbps上联速度 384/64个100/1000M以太网端口 Universal Edge 9000:
Network Management（网管）
OC12/POSX4/GBE
VPN (虚拟专有网)
Etherloop
10Mbps 6-8Mbps 1.5Mbps 1Mbps Various
信息汇聚
XLR8000
XLR8000
XLR8000
XLR8000
ADSL G.Lite 1 M Modem Leased Line
10/100/1000MEthernet/ATM/POS
10/100/1000M LAN
接入
UE9000
CMTS
LAN
ISDN/ADSL/Analog/Leased Line
HFC网
Cable Modem: 30 Mb/s
Proposal - March 14, 1999- 18

光传输层的价值
C o re B u ilde r 90 00 Co r eB uilde 9 00 0 or eB u ild e 00 0 C o re B uild err 9 0 00 C o re B u ilde r 9 00 0 Co r eB uilde 90 00 C o r eB u ilde r 90 00 Co re B uilde 9 00 0 C o r eB u ilde r 90 00 Co re B uilde 9 00 0 C o re B u ilde r 90 00 Co r eB uilde 9 00 0
IP 网络 (Layer 3) ATM/FR 网络 (Layer 2) SDH/interWAN 网络 (Layer 1/2)
光网络 (Layer 1)
刻度化容量开放式接口光网络保护故障管理网路管理最佳性能 32个以上波长，每个波长可传输任何业务直接 IP/ATM 连接及业务提供高效网路保护 (<50ms) 网路故障及劣化的识别业务提供及管理业界最小的失包率(10-15 BER)
Proposal - March 14, 1999- 19