路由器的故障檢測(cè)講座-文庫(kù)吧資料
2024-12-14 12:26本頁(yè)面
【正文】 IP, M mobile, B BGP D EIGRP, EX EIGRP external, O OSPF, IA OSPF inter area E1 OSPF external type 1, E2 OSPF external type 2, E EGP i ISIS, L1 ISIS level1, L2 ISIS level2, * candidate default U peruser static route Gateway of last resort is not set C , FastEther0/0 C , FastEther0/1 R [120/1] via , 00:02:32, FastEther0/0 R [120/2] via , 00:06:43, FastEther0/0 在 Router1的路由信息表中只有一條到 30網(wǎng)絡(luò)的路由信息， Router2中只有一條到 10網(wǎng)絡(luò)的路由信息。 Router3 F0/0 F0/1 F0/0 F0/1 Router1 Router2 F0/0 F0/1 圖 94 網(wǎng)絡(luò)布局示意圖 現(xiàn)在讓我們來(lái)看一下 Router1， Router2和 Router3的配置信息。通過(guò)超級(jí)終端連接到每個(gè)路由器并查看各個(gè)端口的狀態(tài)都是 UP狀態(tài)?，F(xiàn)在就讓我們來(lái)看一個(gè)實(shí)例。通過(guò)在路由器中輸入 show ip int f0/0可以很清楚的看到以太網(wǎng) f0/0口上的 ip信息 顯示 ip信息的執(zhí)行過(guò)程如下： 2611sh ip int f0/0 FastEther0/0 is up, line protocol is up Inter address is Broadcast address is MTU 1500 bytes, Helper address is not set Directed broadcast forwarding is disabled Outgoing access list is not set Inbound access list is not set Proxy ARP Is Enabled Security Level Is Default Spilt horizon Is Enabled ICMP redirects are always sent ICMP unreachables are always sent ICMP mask replies are never sent IP fast switching is enabled IP fast switching on the same interface is enabled IP Null turbo vector IP multicast fast switching is enabled IP multicast distributed fast switching is disabled router Discovery Is disabled IP output packet accounting is disabled IP access violation accounting is disabled TCP/IP header pression is disabled RTP/IP header pression is disabled Probe proxy name replies are disabled Policy routing Is disabled Network address translation is disabled WCCP Redirect outbound is disabled WCCP Redirect exclude is disabled BGP Policy Mapping is disabled 2621 很明顯，此接口的 IP地址是 ，且它的 MTU值是 1500byte，同時(shí)我們也很容易的看到關(guān)于 ARP， ICMP， TCP/IP 等信息。此時(shí)該端口的所有配置都不需要更改。 第三種經(jīng)常遇到的情況是： FastEther0/0 is up, line protocol is down Hardware is AmdFE, address is (bia ) Inter address is MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, reliabilty 255/255, txlod 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Autoduples, Auto Speed, 100BaseTX/FX ARP type:ARPA, ARP Timeout 04:00:00 Last input never, output 00:00:06, output hang never Last clearing of “show interface” counters never Input queue:0/75/0/0(size/max/drops/flushes)。FastEther0/0 is up，代表本端口在物理上沒(méi)有問(wèn)題，line protocol is up說(shuō)明協(xié)議也很正常。 第二種端口正常的情況下出現(xiàn)的問(wèn)題： 2621 int f0/0 FastEther0/0 is up, line protocol is up Hardware is Lance, address is (bia ) Inter address is MTU 1500 bytes,BW 100000 Kbit, DLY 1000 usec, rely 255/255, load 1/255 Encapsulation APPA, loopback not set, keepalive set (10 sec) Autoduplex, Auto Speed, 100BaseTX/FX ARP type:ARPA, ARP Timeout 04:00:00 Last input 00:00:00, output 00:00:00, output hang never Last clearing of show interface counters never Queueing strategy: fifo Output queue 0/40, 0 drops。 input queue 0/75, 0 drops 5 minute input rate 1000 bits/sec, 2 packets/sec 5 minute output rate 1000 bits/sec, 2 packets/sec 0 packets input, 0 bytes, 0 no buffer Received 0
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