第四章---路由

Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,2007 Brocade Communications Systems,Inc.All rights reserved.,*,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,2007 Brocade Communications Systems,Inc.All rights reserved.,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Brocade Corporate Update,Briefing Information Embargoed Until 10/22/07,October 2007,2007 Brocade Communications Systems,Inc.All Rights Reserved.,*,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,2007 Brocade Communications Systems,Inc.All rights reserved.,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,2007 Brocade Communications Systems,Inc.All rights reserved.,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,2007 Brocade Communications Systems,Inc.All rights reserved.,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,Brocade Corporate Update,Briefing Information Embargoed Until 10/22/07,October 2007,2007 Brocade Communications Systems,Inc.All Rights Reserved.,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,2007 Brocade Communications Systems,Inc.All rights reserved.,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,神州数码,SAN,网络认证培训课程,系列,DC-BCFP,第四章,路由,Routing,Routing Overview,Fabric Routing is logic used by a switch to pass frames from the source domain toward the destination domain,FC-FC Routing is performed by a Fibre Channel router,to pass frames from a source device in one fabric toward a destination device in another fabric without merging the fabrics,This module focuses on Fabric Shortest Path First(FSPF)routing,There is a web-based training module on FC-FC routing*,SAN B,SAN A,Fabric Routing,FC-FC Routing,Fabric Terminology,Inter-switch Links(ISLs),E_Port-to-E_Port links,Communicates using,Class F service,Will be segmented if link parameters are incompatible,Principal Switch,Selected when the fabric initializes,before routing is established,Manages the assignment of unique domain IDs,Provides time synchronization to all other switches in the fabric,Principal ISL,ISL used to communicate between the Principal Switch and other switches in the fabric,Routing Terminology,Over-subscription,The,possible,contention for bandwidth by devices through an ISL,Congestion,The,actual,contention for bandwidth by devices through an ISL,ISL over-subscription ratio,By port count,Easier to calculate,less accurate,(#of Device ports)to the(#of E_Ports)expressed as 15,:,1,7,:,1,3,:,1,By bandwidth,More difficult to calculate,more accurate,(Sum of HBA bandwidths),to the,(Sum of ISL bandwidths),expressed as 7,:,1,3,:,1,Locality,Reducing transmission latency by physically placing hosts and storage that communicate frequently such that no routing(same switch)or minimal routing(adjacent switches)is required,Easier to manage in small SANs than large or growing SANs,Easier to manage in Directors,Eight Virtual Channels(queues)are used per ISL,Used to solve traffic congestion by interleaving frames,VC0 Class F:Link Control Frames,VC1 Class Two:ACKS and,F_RJT(Frame reject),Link Control,VC2 thru VC5 Data Frames,VC6 Multicast Traffic,VC7 Broadcast Traffic,Original Virtual Channels(Pre-Condor2/GoldenEye2),Switch,Port,VC0,VC1,VC2,VC3,VC4,VC5,VC6,VC7,ISL,Switch,Port,Switch,Port,VC0,VC1,VC2,VC3,VC4,VC5,VC6,VC7,8 Gbit/sec Switch and Director Virtual Channel Model(Condor2/GoldenEye2 based),VC#,Assigned to,%Bandwidth,0,Class F,1,Class 2 acks,2,Medium Priority QoS,30%,3,Medium Priority QoS,4,Medium Priority QoS,5,Medium Priority QoS,6,Class 3 Multicast,7,Broadcast/Multicast,8,Low Priority QoS,10%,9,Low Priority QoS,10,High Priority QoS,60%,11,High Priority QoS,12,High Priority QoS,13,High Priority QoS,14,High Priority QoS,15,Reserved,Domain,ID 4,Domain ID 3,Domain ID 2,Domain ID 6,Domain ID 5,Domain ID 1,Principal ISL,ISL,-Switch 4 is the Principal Switch,-Principal ISLs are upstream and downstream,Upstream:none,Downstream:ports 1,7,Upstream:port 2,Downstream:ports 5,7,Upstream:port 6,Downstream:none,Upstream:port 0,Downstream:none,Upstream:port 0,Downstream:port 5,Upstream:port 6,Downstream:none,Principal Switch Path,Set the preferred Principal Switch priority using,fabricprincipal-f,1,(v4.x and later),-f,forces a fabric rebuild after enabling on a switch,T