双ISP链路能否用rstp 播放器防止环路

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&&& 1.RSTP概述:(Rapid Spanning Tree Protocol,RSTP)快速生成树,RSTP(IEEE 802.1w)是为了弥补STP(IEEE 802.1d)的缺陷而制定的.
&&& 在网络拓扑中使用IEEE 802.1生成树协议来保证网络中没有环路,但是当网络拓扑发生变化时,通常至少需要30秒才能恢复网络,30秒的故障恢复时间是在当前的网络中是不能忍受的。为了解决这个问题,有了RSTP,RSTP采用了STP的基本概念,加快了收敛速度。
&&& 1)RSTP端口角色
&&& RSTP协议中除规定了根端口、制定端口和阻塞端口外,又规定了两种端口类型,即替代端口和备用端口.
&&& 替代端口:能够到达根网桥的替代路径,在非根网桥上,当根端口出现故障,替代端口将成为根端口。
&&& 备用端口:能够提供网段冗余连接的备份端口,当指定端口出现故障,替代端口就会成为指定端口。
&&& 2)RSTP端口状态
&&& RSTP协议只定义了三种端口状态:丢弃、学习、转发
&&& 丢弃:此状态合并了IEEE 802.1d的禁用、阻塞和侦听状态,端口如果处于此状态将丢弃入站的帧,并且不学习MAC地址。
&&& 学习:与IEEE 802.1d的学习状态相同,学习MAC地址但是丢弃入站的帧。
&&& 转发:发送和接收数据帧,并且能够学习MAC地址。
&&& 3)RSTP的收敛
&&& 在RSTP的网络中,每台交换机主动维护网络拓扑,即所有的交换机所有端口都定期(hello时间)发送BPDU报文(STP网络中交换机只是中继根网桥的BPDU报文,所以STP网络中只有根网桥的BPDU报文)。入如果交换机连续3次没有收到邻接交换机的BPDU报文,则认为邻接交换机出现故障,默认的hello时间是2秒,所以RSTP发现故障的时间是6秒,STP的最大寿命是20秒。
&&& 为了实现端口的快速转发,在RSTP中定义了两种新的变量
&&& 边缘端口:边缘端口即在网络边缘,这种端口不会形成环路,所以这种端口可以立即进入转发状态。和STP中的速端口基本相同,当端口收到BPDU报文的时候,它就会失去边缘端口的状态,成为正常的生成树端口。命令如下:
&&& Switch(config-if)#spanning-tree portfast
&&& 链路类型:Cisco交换机默认情况下,如果端口工作在全双工模式下,则认为其是点到点的链路(point-to-point);如果端口工作在半双工模式下则不是点到点的链路,而是认为其工作在共享介质上。
&&& 点到点的链路通过和邻接交换机交换BPDU快速确定端口状态。例如:一台交换机提议将自身的端口变为指定的端口,如果对端的交换机同意,则它会是同相同的消息回复。当提议和回复消息完成后,就完成了指定端口的选择,而不需要经过STP的计时器的等待时间。但是有时候,由于某种原因导致交换机端口工作在半双工模式,这时可以通过命令将端口变为点到点的链路,命令如下:
&&& Switch(config-if)#spanning-tree link-type point-to-point
&&& RSTP通过对STP的改进,大幅度加快了收敛的速度。
&&& 2.快速PVST+
&&& RSTP和STP一样都是一种底层技术,在启用MST或者RPVST+(快速PVST+)后才会使用RSTP。Cisco交换机默认运行PVST+,使用传统的8021.d生成树。如果需要将PVST+模式更改为RPVST+,可以通过如下命令实现:
&&& Switch(config)#spanning-tree mode rapid-pvst
&&& RPVST+和PVST+相同,为每一个VLAN生成一个单独的RSTP实例,可以通过show spanning-tree 查看RPVST+的状态。
&&& 650) this.width=650;" alt="" 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" />
&&& 如上图所示:中断SW1和SW2直连的链路,如果是PVST+,则SW2将中断50秒左右。如果使用RPVST+,则SW2向SW3发送BPDU报文,认为自己的根网桥,在点到点的链路上通过和邻接交换机交换BPDU快速确定端口状态。当SW2收到次BPDU报文并同意后,F0/23端口成为新的根端口,SW3的F0/24成为指定端口,整个过程持续时间很短。
&&& MST(Multiple Spanning Tree Protocol,MST)多生成树
&&& 1.MST概述&&
&&& 无论是PVST+还是RPVST+,都为每一个VLAN生成一个生成树,如果VLAN数量过多的话,将占用太多的交换机资源。
&&& IEEE 802.1s定义的多生成树 (MST或者MSTP)就是用于解决STP实例过多的问题。
&&& MST是对RSTP的扩展,所以MST有RSTP的快速特性,并且MST可以将一个或者多个VLAN映射到一个STP实例中,从而减少STP实例的数量。
&&& 2.MST配置
&&& (1)启用MST模式
&&& Switch(config)#spanning-tree mode mst
&&& (2)进入MST配置模式,在交换机启动了MST模式后,要对MST配置需要进入到MST配置模式,命令如下:
&&& Switch(config)#spanning-tree mst configuration
&&& (3)配置MST区域名
&&& Switch(config-mst)#name name
&&& 其中,name为配置MST的区域名,最多32个字符,一般网络中只是用一个MST区域名.
&&& (4)配置区域配置修订号
&&& Switch(config-mst)#revision version
&&& 其中,version的范围是0-65535,在提交新的MST配置时,配置修订号不会自动增加,另外,交换机的区域配置必须相同(区域名/区域修订号等).
&&& (5)将VLAN映射到MST实例
&&& Switch(config-mst)#instance instance-id vlan vlan-list
&&& (6)设置MST实例的优先级
&&& Switch(config)#spanning-tree mst instance-id priority bridge-priority
&&& Switch(config)#spanning-tree mst instance-id root { primary | secondary }
&&& (7)查看mst生成树协议
&&& Switch#show spanning-tree
&&& 3.MST配置实例
&&& 650) this.width=650;" alt="" 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" />
&&& 如图:交换机之间都是100Mb/s链路,交换机为默认配置,要求实现VLAN的负载均衡。
&&& 配置如下:
&&& (1)配置交换机之间的链路为trunk
&&& SW1(config-if-range)#switchport mode trunk
&&& SW2、SW3上一样配置
&&& (2)配置链路的负载均衡
&&& 在配置负载均衡前,首先要在交换机上配置MST
&&& ###############
&&& 由于IOS不支持MST,截不了图,手写命令吧
&&& SW1(config)#spanning-tree mode mst
&&& SW1(config)#spanning-tree mst configuration
&&& SW1(config-mst)#name aaa
&&& SW1(config-mst)#revision 10
&&& SW1(config-mst)#instance 1 vlan 1-2
&&& SW1(config-mst)#instance 2 vlan 3-4
&&& SW2/SW3上做一样的MST配置
&&& 然后配置负载均衡
&&& SW1(config)#spanning-tree mst 1 priority 4096
&&& SW2(config)#spanning-tree mst 2 priority 4096
&&& 然后使用show spanning-tree mst instance-id 查看生成树状态本文出自 “” 博客,请务必保留此出处
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