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qingtong
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12-11-2020
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OSPF 如何计算其度量或成本?
11-12-2013
首先,OSPF采用接口带宽和参考带宽来计算metric.metric=10^8/BW(10^8这一固定值称为参考带宽)其中BW的单位是bit/s,(EIGRP的metric计算公式中的BW单位是kbit/s).举例:接口配置带宽为128kbit/s,metric=10^8/128*10^3=781
HSRP版本2和HSRP版本1有何区别?
11-12-2013
HSRP v2和v1的主要区别:1,报文格式完全改变2,支持毫秒级的timer3,组号由原来的0-255变成现在的0-40954,多播地址由v1的224.0.0.2变成v2的224.0.0.102(v1的224.0.0.2有可能会和CGMP冲突,现在HSRPv2可以和CGMP同时运行)5,原来的报文里面源MAC地址为虚mac地址,现在v2在消息报文里面添加了发送MAC地址的字段6,虚MAC地址的变化原来的是00-00-0c-07-ac-xx,现在是00-00-0c-9f-fx-xx7,HSRP ...
配置 BGP 对等组有哪些优点?
11-12-2013
BGP的对等体组应用的优点:1,简化配置和策略管理工作,因为把多个对等体编组,统一进行配置.2,提高路由器性能,因为对于发往一个对等体组中的多个对等体的路由只需要查询依次策略数据库.
;BGP 路径选择标准是什么?
11-12-2013
BGP13条选路规则:1,管理性权值的更大优选2,local_pref更大的优选3,local_pref相同,本地发起的路由优选4,local_pref相同,且没有本地发起路由,as_path数量小的优选5,as_path相同,根据路由来源依次优选:IGP>EGP>Incomplete6,路由来源相同,MED低的路由优选7,MED相同,依次优选EBGP>联盟EBGP>IGP8,NEXT_HOP最近的优选9,开启负载均衡,则均衡10,没有开启负载均衡,学习时间长的优选11,下一跳BGP路由器ID小...
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