【正文】 onfigured, insane, invalid, unsynced, stratum 16ref ID , time (08:00: GMT Mon Jan 1 1900)our mode client, peer mode unspec, our poll intvl 1024, peer poll intvl 1024root delay msec, root disp , reach 0, sync dist delay msec, offset msec, dispersion precision 2**5, version 3 time (08:00: GMT Mon Jan 1 1900)28 / 69rcv time (08:00: GMT Mon Jan 1 1900)xmt time (11:05: GMT Mon Mar 25 2022)filtdelay = filtoffset = filterror = configured, insane, invalid, unsynced, stratum 16ref ID , time (08:00: GMT Mon Jan 1 1900)our mode client, peer mode unspec, our poll intvl 1024, peer poll intvl 1024root delay msec, root disp , reach 0, sync dist delay msec, offset msec, dispersion precision 2**5, version 3 time (08:00: GMT Mon Jan 1 1900)rcv time (08:00: GMT Mon Jan 1 1900)xmt time (11:04: GMT Mon Mar 25 2022)filtdelay = filtoffset = filterror = configured, selected, sane, valid, stratum 1ref ID .GPS., time (11:19: GMT Mon Mar 25 2022)our mode client, peer mode server, our poll intvl 128, peer poll intvl 128root delay msec, root disp , reach 377, sync dist delay msec, offset msec, dispersion precision 2**9, version 3 time (11:19: GMT Mon Mar 25 2022)rcv time (11:19: GMT Mon Mar 25 2022)xmt time (11:19: GMT Mon Mar 25 2022)filtdelay = filtoffset = filterror = configured, selected, sane, valid, stratum 1ref ID .GPS., time (11:18: GMT Mon Mar 25 2022)our mode client, peer mode server, our poll intvl 256, peer poll intvl 128root delay msec, root disp , reach 377, sync dist delay msec, offset msec, dispersion precision 2**9, version 3 time (11:20: GMT Mon Mar 25 2022)rcv time (11:20: GMT Mon Mar 25 2022)xmt time (11:20: GMT Mon Mar 25 2022)filtdelay = filtoffset = filterror = 29 / 69其中可用的 NTP Server 的狀態(tài)應(yīng)該為： “valid”。三、DNS 設(shè)備狀態(tài)檢查（一）內(nèi)部 DNS 設(shè)備狀態(tài)檢查(以下內(nèi)容用于檢查 ALCATEL 自己的 DNS，此時(shí) DNS 位于 GPRS 系統(tǒng)局域網(wǎng)內(nèi)部)一般來說 ALCATEL GPRS 使用自己的 DNS 進(jìn)行域名解析，此時(shí) DNS 位于系統(tǒng)局域網(wǎng)的內(nèi)部，這種情況下可以對(duì) DNS 的工作狀態(tài)進(jìn)行較全面的檢查。 1．DNS 網(wǎng)絡(luò)接口工作狀態(tài)檢查檢查所有的接口狀態(tài)： ifconfig –alo0: flags=849UP,LOOPBACK,RUNNING,MULTICAST mtu 8232 i mask ff000000hme0: flags=863UP,BROADCAST,NOTRAILERS,RUNNING,MULTICAST mtu 1500 i mask fffffff0 broadcast ether 8:0:20:ea:e0:cdqfe0: flags=863UP,BROADCAST,NOTRAILERS,RUNNING,MULTICAST mtu 1500 i mask fffffff0 broadcast ether 8:0:20:ea:e0:cdqfe1: flags=863UP,BROADCAST,NOTRAILERS,RUNNING,MULTICAST mtu 1500 i mask fffffff8 broadcast ether 8:0:20:ea:e0:cdqfe2: flags=863UP,BROADCAST,NOTRAILERS,RUNNING,MULTICAST mtu 1500 i mask ffffffe0 broadcast ether 8:0:20:ea:e0:cd檢查單個(gè)接口的狀態(tài)：ifconfig hme0hme0: flags=863UP,BROADCAST,NOTRAILERS,RUNNING,MULTICAST mtu 1500 i mask fffffff0 broadcast ether 8:0:20:ea:e0:cd 所有接口的狀態(tài)必須正確。2．檢查 DNS 路由信息的正確性使用 stat 命令可以對(duì) DNS 當(dāng)前所使用的路由表進(jìn)行檢查，以下為輸入 stat命令后系統(tǒng)顯示的路由表：其中 Destination 表示目的地址，Gateway 表示該條路由所使用的網(wǎng)關(guān)地址。30 / 69 stat –rnRouting Table: Destination Gateway Flags Ref Use Interface U 2 3101 qfe1 U 3 5977 hme0 U 2 0 qfe0 U 2 81662 qfe2 UG 0 464 UG 0 0 UG 0 0 UG 0 12811 UG 0 0 UG 0 0 UG 0 212 UG 0 0 UG 0 0 UG 0 44132 UG 0 0 UG 0 0 UG 0 26092 UG 0 0 UG 0 0 UG 0 14867 UG 0 0 UG 0 0 U 3 0 hme0default UG 0 305018 UH 01103973 lo03．DNS 文件系統(tǒng)檢查 df –kFilesystem kbytes used avail capacity Mounted on/dev/dsk/c0t0d0s0 3008649 21499 2926978 1% /31 / 69/dev/dsk/c0t0d0s3 6049124 388699 5599934 7% /usr/proc 0 0 0 0% /procfd 0 0 0 0% /dev/fd/dev/dsk/c0t0d0s4 6049124 590718 5397915 10% /var/dev/dsk/c0t0d0s7 6049124 9 5988624 1% /export/home/dev/dsk/c0t0d0s5 12096820 91570 11884282 1% /optswap 2665984 216 2665768 1% /tmp所有的邏輯卷的使用率不能超過 90%。4．檢查 DNS 的 LOG 文件： 所有記錄文件都存儲(chǔ)在/var/adm/syslog 目錄下。5．檢查 DNS 進(jìn)程的運(yùn)行狀態(tài)用下面的命令檢查 DNS 內(nèi)的進(jìn)程 named 運(yùn)行正常 ps ef | grep named | grep v grep root 22827 1 0 Jul 25 ? 0:05 /usr/sbin/named該進(jìn)程用于處理來自客戶端的 DNS 查詢。 6．檢查 DNS 配置文件 cat /etc/options { directory /etc/。 // running directory for named /* * If there is a firewall between you and nameservers you want * to talk to, you might need to unment the querysource * directive below. Previous versions of BIND always asked * questions using port 53, but BIND uses an unprivileged * port by default. */ // querysource address * port 53。forwarders { 。 。 }。}。zone { type slave。 file 。32 / 69 masters { 。 }。}。zone { type slave。 file 。