看看这个配置问题出在哪了？CMTS

erayon CMTS#show ru<br>
Building configuration...<br>
<br>
!<br>
! System Configuration<br>
!<br>
version 4.0.2.0.24<br>
!<br>
username $enable15$ password GaFJQlgM3q6vY<br>
username lbf password YPiTLcAfLEvSY<br>
username root password /MDc1LeZDKrjo<br>
!<br>
enable password level 15 GaFJQlgM3q6vY<br>
!<br>
hostname &quot;Terayon CMTS&quot; location Lab contact &quot;Contact person&quot;<br>
!<br>
ip ftp username admin<br>
ip ftp password 7 bcbc2a215d0ba036d1b5bb02d6d6764f<br>
ip http port 80<br>
no ip http server<br>
line console 0<br>
line vty 0<br>
!<br>
! Interfaces Configuration<br>
!<br>
interface fastethernet 0/2<br>no shutdown<br>no bandwidth<br>no duplex<br>no ip redirects<br>
!<br>
interface fastethernet 0/0/0<br>no shutdown<br>no bandwidth<br>no duplex<br>ip address 192.168.20.11 255.255.255.0 <br>no ip redirects<br>
interface fastethernet 0/0/1<br>no shutdown<br>no bandwidth<br>no duplex<br>no ip address <br>no ip redirects<br>
interface fastethernet 0/0/2<br>no shutdown<br>no bandwidth<br>no duplex<br>ip address 218.201.254.19 255.255.255.248 <br>ip address 192.168.100.2 255.255.255.0 secondary<br>no ip redirects<br>
interface fastethernet 0/0/3<br>no shutdown<br>no bandwidth<br>no duplex<br>ip address 192.168.40.2 255.255.255.0 <br>no ip redirects<br>
!<br>
! ACCESS Configuration<br>
!<br>
interface access 0<br>cable helper-address 192.168.100.3<br>ip address 10.24.0.1 255.255.0.0 <br>ip address 10.23.0.1 255.255.0.0 secondary<br>cable dhcp-giaddr policy<br>
!<br>
! Cable Configuration<br>
!<br>cable flow-management downstream expedited-deletion<br>cable flow-management downstream safegard-deletion<br>cable privacy root-certificate 2<br>
!<br>
interface cable 1<br>
no shutdown<br>cable downstream frequency 609000000<br>cable downstream interleave-depth 32<br>cable downstream modulation 64qam<br>cable downstream annex B<br>no cable downstream shutdown<br>no cable upstream 0 shutdown<br>cable upstream 0 0 channel-type tdma modulation-profile 27<br>cable upstream 0 0 frequency 10360000<br>cable upstream 0 0 channel-width 3200000<br>cable upstream 0 0 power-level 20<br>no cable upstream 0 0 shutdown<br>cable upstream 0 1 frequency 10360000<br>cable upstream 0 1 channel-width 3200000<br>cable upstream 0 1 power-level 20<br>no cable upstream 0 1 shutdown<br>no cable upstream 1 shutdown<br>cable upstream 1 0 channel-type tdma modulation-profile 27<br>cable upstream 1 0 frequency 17360000<br>cable upstream 1 0 channel-width 3200000<br>cable upstream 1 0 power-level 20<br>no cable upstream 1 0 shutdown<br>cable upstream 1 1 frequency 17360000<br>cable upstream 1 1 channel-width 3200000<br>cable upstream 1 1 power-level 20<br>no cable upstream 1 1 shutdown<br>no cable upstream 2 shutdown<br>cable upstream 2 0 channel-type tdma modulation-profile 27<br>cable upstream 2 0 frequency 24360000<br>cable upstream 2 0 channel-width 3200000<br>cable upstream 2 0 power-level 20<br>cable upstream 2 0 shutdown<br>cable upstream 2 1 frequency 24360000<br>cable upstream 2 1 channel-width 3200000<br>cable upstream 2 1 power-level 20<br>cable upstream 2 1 shutdown<br>no cable upstream 3 shutdown<br>cable upstream 3 0 channel-type tdma modulation-profile 27<br>cable upstream 3 0 frequency 31360000<br>cable upstream 3 0 channel-width 3200000<br>cable upstream 3 0 power-level 20<br>no cable upstream 3 0 shutdown<br>cable upstream 3 1 frequency 31360000<br>cable upstream 3 1 channel-width 3200000<br>cable upstream 3 1 power-level 20<br>cable upstream 3 1 shutdown<br>no cable privacy accept-self-signed-certificate<br>cable privacy validity-period-check<br>
!<br>
! Route Configuration<br>
!<br>
ip route 0.0.0.0 0.0.0.0 218.201.254.18<br>
<br>
<br>
<br>
show cable modem 显示cm的上线状态为 init（rc）

应该是上行通道的频率设置问题，前30M 有其他应用，干扰很大

啥问题？<br>
好像上行频点设置的不妥。

在调试时我发现，如果把和DHCP服务器相连的一端ip设为次级地址（secondary）的话，CMTS内部的路由不起作用，也就是说cable modem得不到配置文件，配置文件到fa0/0/0口就被丢弃<br>
另外我测试发现如果DHCP server的ip地址用的是192.168.100.x/24 modem得不到ip地址， 我怀疑这与cable modem以太网口的ip地址有关<br>
我也一直不明白其中的原因<br>
上面的配置，我的客户告诉我在他们那里用了一段时间可以用的，后来因为打雷断电才出现了问题，不知道那位大侠可以看出上述配置的套路，我实在是搞不懂！给他重新做了一个配置，就是把dhcp server相连端连到另外一个接口Fa0/0/1上，并把其ip端换了一下（10.200.1.1/24），问题解决了！

上行是默认的设置，是有些不妥，我已经建议过他们了建议他们放到20M以上，客户是搞纯数据网，不太明白这方面！

我更郁闷，碰到的用户，ping外网正常，ping网内网关，丢包……

上行回传功率设置的高点了吧？<br>ip address 192.168.100.2 255.255.255.0 secondary<br>
这里最好看看

我曾经试验过如果和DHCP server用的是192.168.100.x这个网段，cm上线状态经常是停在 init（rc）状态，想问问大家这个是不是和合cm以太网口本身的地址冲突造成的？

我觉得地址冲突的可能性不大,大多用的都是开放的地址,以太网地址用户是没有权限的,所以地址应该没什么问题.

CM内置网段使用了192.168.100.0/24，在应用中要避开这个网段。