LKP:auto-cost reference-bandwidth 这个命令是改变OSPF的metric计算方式,缺省的值是100,代表100M/BW,因为s0接口缺省的带宽是1.544M,所以,正常计算结果是64.76,METRIC只能取整,所以是64。 但是你已经调了 auto-cost reference-bandwidth 为10000M,那么就是10000M/BW=6476。你的理解是对的,但是配置的时候注意必须在OS...
于是auto-cost reference-bandwidth就被引入了进来。它的出现通过人为的改变参照值实现可以在1000M或者更高的链路上实现OSPF 的cost值自动计算。 例如:auto-cost reference-bandwidth 10000 被设定后,对于千兆链路而言,就会自动计算其cost值为cost=10000*10^6/(1000*10^6)=10;而对于10G的链路而言,也会自动的计算其...
ospf auto-cost reference-bandwidth 是用来修改默认度量值的命令.一般默认情况下就是:ospf auto-cost reference-bandwidth 100 这时100M和1G的链路上metric都是1 而如果是:ospf auto-cost reference-bandwidth 1000 这时100M是10,而1G的链路就是1.所以这题的答案就是5 ...
【题目】ospf auto-cos treference-bandwidth ?On router R1 the IOS command "ospf auto-co 相关知识点: 试题来源: 解析 【解析】osp fauto-cos treference-bandwidth 是 用来修改默认度量值的命令。 【解析】osp fauto-cos treference-bandwidth 是 【解析】osp fauto-cos treference-bandwidth 是 【解析】...
OSPF之auto-cost reference-bandwidth的应用 在OSPF的使用过程中,当链路中的带宽(端口的带宽)不一致时,为了防止设备自动计算cost值出现失误,我们往往手动的通过更改auto-cost的值来实现人为控制路由选路(ip ospf cost也可以达到人为选路的目的),现在我们以一个实例来说下auto-cost的使用。
The OSPF metric is calculated as the ref-bw value divided by the bandwidth value.The default ref-bw is 10^8bps.Cisco provides the command auto-cost reference-bandwidth, which allows the default reference bandwidth to be chan...
25 Destination/Mask Proto Pre Cost Flags NextHop Interface 1.1.1.9/32 Direct 0 0 D 127.0.0.1 LoopBack1 2.2.2.9/32 OSPF 10 1 D 172.1.1.2GigabitEthernet1/0/0 3.3.3.9/32 OSPF 10 2 D 172.1.1.2GigabitEthernet1/0/0 OSPF 10 2 D 172.6.1.2GigabitEthernet2/0/0 4.4.4.9/32 OSPF 10 3 ...
Router# show auto discovery qos Serial2/1.1 AutoQoS Discovery enabled for trusted DSCP Discovery up time: 2 hours, 42 minutes AutoQoS Class information: Class Voice: Recommended Minimum Bandwidth: 118 Kbps/1% (PeakRate) Detected DSCPs and data: DSCP value AverageRate PeakRate Total (...
router ospfv3 route-map Close mpls traffic-eng auto-bw timers To enable automatic bandwidth adjustment for a platform and to start output rate sampling for tunnels configured for automatic bandwidth adjustment, use the mpls traffic-eng auto-bw timers command in global configuration mode. To disa...
000. Using this formula, the OSPF cost for a T1 is 65 (100,000,000/1,544,000). This number is also convenient because it causes the cost of an FDDI link or Fast Ethernet to be 1. This command allows you to modify the reference bandwidth to support interfaces that are faster than ...