[ntp:questions] Re: latest dev snap won't peer with IOS ntp
Joshua Coombs
jcoombs at gwi.net
Fri Apr 22 16:46:48 UTC 2005
> Start by trimming your list of servers. There's no way nptd can
> use more than ten at a time and there is seldom any need to use more
> than five. You will note that six of them are in the .INIT. state
> and not reachable! Five servers are sufficient to vote out two bad
> ones and seven can vote out three bad ones. Prune the servers with
> the longest round trip delays.
>
> What command did you use to configure ntp on your Cisco router?
> I've not read of any way to cause a Cisco router to peer with
> another server
ntp clock-period 17179851
ntp source FastEthernet0
ntp update-calendar
ntp server 64.142.103.194
ntp server 67.128.71.65
ntp server 137.146.210.250
ntp server 67.128.71.76
ntp server 67.128.71.75
ntp server 18.26.4.105
ntp peer 192.168.1.113
ntp server 204.152.184.72
ntp server 66.92.68.246
ntp peer 207.5.128.20
ntp peer 207.5.142.56
ntp server 208.184.49.9
ntp server 158.121.95.4
IOS supports both peer and server declarations;
omega(config)#ntp ?
access-group Control NTP access
authenticate Authenticate time sources
authentication-key Authentication key for trusted time sources
broadcastdelay Estimated round-trip delay
clock-period Length of hardware clock tick
master Act as NTP master clock
max-associations Set maximum number of associations
peer Configure NTP peer
server Configure NTP server
source Configure interface for source address
trusted-key Key numbers for trusted time sources
update-calendar Periodically update calendar with NTP time
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