Forum Discussion
NimbostratusF5 LTM not synchronising with NTP Server
Hi All,
Pleae help out, my LTM is not synchronising with my NTP server.
My NTP server is 10.10.10.10, with gateway of 10.10.10.1 on cisco FWSM
My LTM have a management IP of 20.20.20.20 with gateway of 20.20.20.1 on cisco FWSM
The LTM also has a connectioin for productiion traffic and address is 30.30.30.30 with gateway on cisco FWSM as 30.30.30.1.
In this case there, the LTM can reach the NTP server either through the management interface (10.10.10.10) or production traffic interface ( 30.30.30.30), as access had bin allowed on the firewall.
But the issues is....
I cant see the NTP traffic from the LTM when I view the live log on FWSM
What interface by default will the LTM use to communicate with the NTP server.
I have define route to the NTP server through this two interfaces, yet its not working. PLS HELP !!!!
3 Replies
Beinhard_8950Hi,
it will go on eth0, so if u have default gw on mgmt interface it should be enough.
/Beinhard
HamishCirrocumulus
Login to the cli and type
ntpq -p
and examine the output. It'll tell you what the sync status of the ntp daemon is with your ntp servers. Verify the status. I suspect it'll say something like .INIT. which I've seen a couple of units do for unexplained reasons. Just do a quick 'bigstart restart ntpd' and that'll restart ntpd and cause it to try & talk to the upstream ntp servers you've defined.
An ntpq -p every now & again will (SHould) show you the ntpd getting the delta between the local time and the ntp servers. You'll probably geta quick step into line, and then ntpd should (Within a few monites) eventually get into sync and start to track the clock of one of the servers.
Checkout the ntpd doc on the internet for various status results of the ntp servers.
If for some reason you never see any success with your defined servers, doa quick tcpdump on eth0 looking for udp packets on port 123. You should see requests and responses. if not, you have a problem somewhere with your routing or a firewall (Possibly).
H
Justkennie_4820
[root@ACC-GTM-01:Active] config tcpdump udp port 123
tcpdump: WARNING: eth0: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 108 bytes
16:37:30.201229 IP ACC-GTM-01.ABC.COM.ntp > 10.2.104.19.ntp: NTPv4, Client, length 48
16:37:30.203031 IP 10.2.104.19.ntp > ACC-GTM-01.ABC.COM.ntp: NTPv3, Server, length 48
16:38:05.202147 IP ACC-GTM-01.ABC.COM.ntp > 10.2.104.47.ntp: NTPv4, Client, length 48
16:38:05.202738 IP 10.2.104.47.ntp > ACC-GTM-01.ABC.COM.ntp: NTPv3, Server, length 48
[root@ACC-GTM-01:Active] config ntpq -np
remote refid st t when poll reach delay offset jitter
==============================================================================
10.2.104.47 .LOCL. 1 u 46 64 377 0.596 -117951 9.868
10.2.104.19 10.2.104.10 3 u 15 64 377 0.523 -117953 19.465
