CCNA 新加坡 986 PASS
本帖最后由 1563614 于 2012-8-17 15:18 编辑再次验证鸿鹄的V104.4的题库是全球的。我遇到2个新题,一个是问ospf上如果没配loopback 地址,那router ID 用啥。我选的 priority number until loopback ip is configured. 还有一个是问RIP 路由网路,执行 show ip route 后看到四条路由,包括三个RIP 和一个直连的,问那个不会进邻居路由表,我选了个metric 15的,我很犹豫到底选直连还是metric 15的,还请各位童鞋大师点拨。估计这2题中错了一题把。
果然是我router ID这个错了。应该选"numerically highest IP address value on an active physical interface",真是遗憾.
If no loopback interfaces are defined, the OSPF process uses the numerically highest IP address value on an active physical interface. If no physical interfaces are active and configured with an IP address, the OSPF code will not initialize. In recent IOS versions, the router issues an error message if it cannot find a router ID. Older versions simply do not initialize OSPF.If there is only a single loopback interface, its IP address will always be the router ID, as shown in Table 2.Table 2. Router ID with a Single Loopback
int loop 0int ser 0int ser 1
ip addr 1.2.3.4ip addr 5.6.7.8ip addr 2.3.4.6
Here, the router ID would be 1.2.3.4. If there were no loopback interfaces, the numerically highest active interface would be used, as shown in Table 3.Table 3. Router ID with No Loopback and Highest IP shutdown
int eth 0int ser 0int ser 1
ip addr 1.2.3.4ip addr 5.6.7.8ip addr 2.3.4.6
no shutdownShutdownno shutdown
Here, 2.3.4.6 would be the router ID. If serial 0 were not shutdown, however, the router ID would be 5.6.7.8.
还有几个注意的地方,VTP 的实验题,我的switch X的 revision 号码是6,比ac3的 revision 号码小,所以答案和题库是不一样的,应该最后只剩下 ac3上原本的 vlan.
STP很多人反应用命令 show spanning-tree vlan 33 或 44 之类的没结果输出,我建议大家直接用命令 show spanning-tree ,这样能看到所有vlan,人要灵活一点嘛。不过我今天遇到的第5题,就是问哪些端口会forward 那个mac table 里面没有的数据,题库说要看trunk 端口里面哪个是 blocking 状态的不选,加上同vlan的一共有3个,可是我今天遇到的 trunk 端口里面居然没有 blocking 状态的,这样可选的答案有4个,我可郁闷了,但是我还是选的ABF,我show spanning tree 后,没有选 root 那个。
{:6_290:} 我跟你遇到了一样的新题,就是那个选ospf环回口的,而且第一题就是它,不过我对了{:6_264:} {:6_291:}{:6_290:}{:6_291:} {:6_267:}{:6_267:}{:6_299:}{:6_299:} {:6_299:}{:6_290:}{:6_299:} {:6_276:}{:6_277:}{:6_282:}{:6_283:}{:6_290:}{:6_299:} {:6_290:} 木有遇到,帮顶{:6_267:} {:6_268:}{:6_290:}{:6_268:}
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