6850E Max NTP Client

[ballooonnn]

Hi their,

I read this board for 3 years about and i've never posted. Today is the day with my NTP issue !

The problem actually take place in an architecture of about 40 switchs (6450) plugged in 2 switchs L3 (6850E) by loops of 3 or 4.
My 2 6850 are NTP Server (stratum 3).

The config in my 2 6850 is :

system timezone CET
system daylight savings time enable
ip service all
ntp master 5
ntp server x.x.x.x
ntp server y.y.y.y prefer
ntp broadcast 10.z.z.255
ntp broadcast-client enable
ntp broadcast-delay 4000
ntp client enable

The config in my 6450 is :

system timezone CET
system daylight savings time enable
ip service all
ntp server unsynchronized
ntp server 10.x.x.1 key 0 version 4 minpoll 6 prefer
ntp server 10.x.x.2 key 0 version 4 minpoll 6
ntp broadcast-client enable
ntp broadcast-delay 4000
ntp client enable


First of all, the ntp broadcasting has never worked. (I don't know if the authent has to be set to make it work or not)

Then, i actually have 29 clients synchronised with with my 6850. Do you think the limit of client has been reached ? (I can't play too much on the running devices)

Finally, is there somewhere a documentation where we could find all the Omniswitchs limitations ?

Thanks everyone taking time to read me !

Br
Ball

[ballooonnn]

I have the answer to my second question that, yes, there is a limitation of the ntp association which is 32 ! (saw that whith the cmd : show ntp status)

So i should choose the ntp broadcast but it seems to not work well.

[silvio]

Hi,
you can use

Code: Select all

ntp max-associations 64

limits often you find at the commands ... in cli guide.
You can check with commands. f.e. with following command

Code: Select all

> ntp max-associations 100
ERROR: Valid NTP Associations are from 0 to 64

Also in boilerplate (you find in business portal) you can find more interesting technical details etc.

regards
Silvio

[ballooonnn]

Oh great, thanks a lot Silvio, i didn't see that commande ...

And it fixed my problem obviously.

I'm still interested in a ntp broadcast server and client set up because i'm surely missing something...