由于最近处理一个静态BFD的问题。
在此贴出BFD的配置及相关的资源链接供大家参考。
关于相关BFD协议的内容和他的模式问题，本想用dynamips加12.2(33)SRC来做测试并抓包分析，但发现一配置BFD，模拟器就crash，先后更换了SRD，SRE及更换了NPE-G1和 NPE-G2，现象一样存在。毕竟只是模拟器呀。。。。。。
所以关于相关BFD的更进一步分析，只能等到手头有设备时直接SPAN了。
注：VRF下的静态BFD，只从12.2(33)SRC才开始支持，支持平台为7600和7200。
6500需要在12.2(33)SXI才支持。 Read the rest of this entry »
PC(modem)———-ISDN———(E1 Pri)2811(PVDM2)
network-clock-participate wic 0 network-clock-select 1 E1 0/0/0 ! isdn switch-type primary-net5 ! chat-script offhook1 "" "ATH1" OK \c chat-script callback1 ABORT ERROR ABORT BUSY "" "ATZ" OK "ATDT \T" TIMEOUT 30 CONNECT \c ！ interface Serial0/0/0:15 ip unnumbered Loopback0 encapsulation ppp dialer rotary-group 1 Read the rest of this entry »
From Show diag:
—————————————————————————–
CISCO2821
HWIC-1CE1T1-PRI
PVDM2-36DM
From Show Run
—————————————————————————–
network-clock-participate wic 1 ! modem country v12 sweden dot11 syslog ip source-route ! controller E1 0/1/0 Read the rest of this entry »
As everyone knows, the NTP is sync clock protocol.
That knowledge less other protocol.
But there are some attention:
——————————————
1. When you config more than one server in customer network.
Please don’t use the same stratum.
Base on the stratum, refer to
http://www.cisco.com/en/US/docs/ios/netmgmt/command/reference/nm_10.html#wp1093957
If customer use same stratum, it would instability and lost sync.
Customer have two 2500W power, now customer want to replace the 6000W power.
Customer want to check whether impact the business when replace the 6000W.
If customer have power usage exceeds need the downtime, as some of the linecards will go down due to lack of power. In case you have less than 2500w usage on the router, then follow the below steps.
1. have your power supply in redundant mode.
2. pull the power supply which is not active
Read the rest of this entry »
