接口速率模式switchport rate-mode shared与Dedicated Rate Mode 的区别
接口速率模式switchport rate-mode shared与switchportDedicrate-modeDedicated 的区别没人????????{:6_267:}{:6_267:}{:6_267:}{:6_267:}{:6_267:} 哪个大神给我解释下!!!!!!! {:6_267:}{:6_267:}{:6_267:}{:6_267:}{:6_267:}{:6_267:}{:6_267:} 在思科数据中心的交换机上可以设定dedicated和shared模式,不同的板卡设定不太一样。例如,Nexus 7000 M1-Series 32-Port 10Gb Ethernet 板卡拥有80Gbps的单向交换带宽,它可以支持8个10Gbps的口进行线速转发,或者允许32个口共享80Gbps的总带宽,前者属于dedicated,后者属于shared。这款板卡有8个port-group,每个group包含4个接口,在dedicated模式,每个group的第一个口是激活的,可以进行线速转发,即10Gbps,其余3个接口处于不可用状态。在shared模式,port-group内的4个接口共享80Gbps带宽。
另外一个范例:
#shared模式,所有接口共享总带宽
Port-Group 1
Total bandwidth is 12.8 Gbps
Total shared bandwidth is 12.8 Gbps
Allocated dedicated bandwidth is 0.0 Gbps
--------------------------------------------------------------------
Interfaces in the Port-Group B2B CreditBandwidthRate Mode
Buffers (Gbps)
--------------------------------------------------------------------
fc9/19 16 4.0shared
fc9/20 16 4.0shared
fc9/21 16 4.0shared
fc9/22 16 4.0shared
fc9/23 16 4.0shared
fc9/24 16 4.0shared
#前3个接口处于dedicated模式,后3个口由于没有足够带宽可以分配,便处于不可用状态
Port-Group 2
Total bandwidth is 12.8 Gbps
Total shared bandwidth is 0.8 Gbps
Allocated dedicated bandwidth is 12.0 Gbps
--------------------------------------------------------------------
Interfaces in the Port-Group B2B CreditBandwidthRate Mode
Buffers (Gbps)
--------------------------------------------------------------------
fc8/1 16 4.0dedicated
fc8/2 16 4.0dedicated
fc8/3 16 4.0dedicated
fc8/4 (out-of-service)
fc8/5 (out-of-service)
fc8/6 (out-of-service)
#前3个接口处于dedicated模式,后3个口共享0.8Gbps的剩余总带宽
Port-Group 3
Total bandwidth is 12.8 Gbps
Total shared bandwidth is 0.8 Gbps
Allocated dedicated bandwidth is 12.0 Gbps
--------------------------------------------------------------------
Interfaces in the Port-Group B2B CreditBandwidthRate Mode
Buffers (Gbps)
--------------------------------------------------------------------
fc8/1 16 4.0dedicated
fc8/2 16 4.0dedicated
fc8/3 16 4.0dedicated
fc8/4 16 4.0shared
fc8/5 16 4.0shared
fc8/6 16 4.0shared 首先要强调一点就是rate mode 只有在M系列线卡才有的概念;独享模式,就是在一个端口组中,只有1个端口可以配置为独享模式并且速率为10G,具体哪个端口要看具体的线卡,其余的端口为禁用状态;共享模式,一个端口组中共享10G的带宽。配置方法,先把端口组中的所有端口shutdown,然后,进入在那个要成为独享模式的端口,改 rate mode,no shutdown
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