Problem:
Cisco box is not forming ntpv4 association with juniper box over IPv6 address
Scenerio 1:
I tried to configure cisco box(7200 series loaded with c7200-ipbasek9-mz.124-24.T5.bin) as ntp client to a juniper box. Both the boxes supports ntpv4 and our network is based on ipv6 addresses.The juniper box is referring to GPS for time source. I will refer the IPv6 address of the directly connected interface of juniper box as server in my cisco box. But unfortunately, the ntp association is not happening between server(juni) and client(cisco). When I enabled ntp debugging on cisco box, I couldn't see any ntp client polling packets going out of cisco box. No error messages seen too. The server's IP is reachable from cisco box.
Config at cisco:
---------------------
ntp logging
ntp server 2001::19
end
luca#show ntp associations detail
2001::19 configured, insane, invalid, unsynced, stratum 16
ref ID .INIT., time 00000000.00000000 (00:00:00.000 UTC Mon Jan 1 1900)
our mode client, peer mode unspec, our poll intvl 1024, peer poll intvl 1024
root delay 0.00 msec, root disp 0.00, reach 0, sync dist 15954.53
delay 0.00 msec, offset 0.0000 msec, dispersion 15937.50
precision 2**24, version 4
org time 00000000.00000000 (00:00:00.000 UTC Mon Jan 1 1900)
rec time 00000000.00000000 (00:00:00.000 UTC Mon Jan 1 1900)
xmt time D158FD9F.52919031 (06:37:19.322 UTC Wed Apr 20 2011)
filtdelay = 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
filtoffset = 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
filterror = 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0
minpoll = 6, maxpoll = 10
luca#
luca#show ntp status
Clock is unsynchronized, stratum 16, no reference clock
nominal freq is 250.0000 Hz, actual freq is 249.9979 Hz, precision is 2**24
reference time is D158E348.80D4E641 (04:44:56.503 UTC Wed Apr 20 2011)
clock offset is 0.0000 msec, root delay is 0.00 msec
root dispersion is 0.11 msec, peer dispersion is 0.00 msec
loopfilter state is 'CTRL' (Normal Controlled Loop), drift is 0.000008311 s/s
system poll interval is 64, last update was 7732 sec ago.
luca#
luca#show running-config interface fastEthernet 2/0 <------------ Intf connected to Juniper box
Building configuration...
Current configuration : 136 bytes
!
interface FastEthernet2/0
ip address 122.12.12.12 255.255.255.0
duplex auto
speed auto
ipv6 address 2001::29/64
ipv6 enable
end
luca#
Scenerio 2:
In this case, cisco is reffering to GPS and juniper box is configured to have the cisco box as ntp client. In this case, I could see client polling packet coming from juniper to cisco but there is no reply from cisco:
<ntp debug snip from cisco box>
.Apr 20 04:44:00.597: NTP message received from 2001::19 on interface 'FastEthernet2/0', (2001::29), table 0.
.Apr 20 04:44:00.597: NTP Core(DEBUG): ntp_receive: message received
.Apr 20 04:44:00.597: NTP Core(DEBUG): ntp_receive: peer is 0x00000000, next action is 3.
.Apr 20 04:44:00.597: NTP Core(DEBUG): ntp_receive: doing fast answer to client.
<ends>
Can some one help if am missing anything in the config or is there any incompatibility issue that I need to take care of.
Thanks,
Prathap V
