How the Best Path Algorithm Works BGP assigns the first valid path as the current best path. BGP then compares the best path with the next path in the list, until BGP reaches the end of the list of valid paths. This list provides the rules that are used in order to determine the best...
in which Cost Communities are compared, is added to the algorithm that the How the Best Path Algorithm Works section describes. This step comes after the required step (point of insertion) in the algorithm. The path with the lowest
BGPBest Path Selection Algorithm Document ID: 13753 Introduction Prerequisites Requirements Components Used Conventions Why Routers Ignore Paths How the Best Path Algorithm Wo 原创 Mark_L_Zhang 2013-03-20 16:16:38 1039阅读 BGP路径选择之community ...
in which Cost Communities are compared, is added to the algorithm that theHow the Best Path Algorithm Workssection describes. This step comes after the required step (point of insertion) in the algorithm. The path with the lowest
RouterA#show ip bgpBGP table version is 4, local router ID is 192.168.1.1 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter, x best-external, a additional-path, c RIB-compressed, t...
BGP local router ID : 10.33.3.3 Local AS number : 100 Paths: 1 available, 1 best, 1 select, 0 best-external, 0 add-path BGP routing table entry information of 10.0.0.0/32: From: 10.23.1.2 (10.22.2.2) Route Duration: 0d07h12m30s Relay IP Nexthop: 0.0.0.0 Relay IP Out-Interface...
[DeviceA] display bgp routing-table BGP Local router ID is 1.1.1.1 Status codes: * - valid, > - best, d - damped, x - best external, a - add path, h - history, i - internal, s - suppressed, S - Stale Origin : i - IGP, e - EGP, ? - incomplete RPKI validat...
· BGP支持HMAC-MD5和MD5认证算法,通过authentication-algorithm命令进行配置。· BGP仅支持标识符取值范围为0～63的key,通过key命令进行配置。命令peer keychain和peer password互斥,不能同时配置。【举例】#在BGP实例视图下,使IP地址为10.1.1.1的对等体使用名为abc的keychain认证。<Sysname> system-view...
The mapping factors the bandwidth value of a particular path against the total bandwidth values of all possible paths, mapped to the range 1 to 100. The BGP best path selection algorithm and the multipath computation algorithm that determines which paths you can use for load balancing does...
其实它就是Pre-bestpath Cost Community。Cost Community是BGP的一个扩展的Community属性,它只能传递给iBGP邻居或联邦peer(含联邦iBGP及联邦eBGP邻居),不能传递给eBGP邻居。众所周知,BGP有14条选路原则,一般的网络工程师最多记住前六条选路原则就足够应付工作中绝大多数的BGP选路问题了,比如weight,local pref, as-...