[ntp:questions] ntp peer association in VLAN query
Phil.Newlon at wendysarbys.com
Phil.Newlon at wendysarbys.com
Mon Jan 19 16:08:59 UTC 2009
Danny -
It sounds like this is the same behavior that I asked about a few weeks
ago, I think.
I have a Windows machine with two IP addresses, acting as an NTP time
source for devices on one of the two networks. Time synch requests come in
from the clients on network A, and the response from the Windows machine is
out the interface on network B. RE: "query-on"
Danny wrote:
What you require is the query-on option. I haven't had time to roll it
into a release yet. You need outbound queries to go on the routeable
address, correct?
Phil
Danny Mayer
<mayer at ntp.isc.or
g> To
Sent by: kiran shirol
questions-bounces <kiran.shirol at gmail.com>
+phil.newlon=wend cc
ysarbys.com at lists questions at lists.ntp.org
.ntp.org Subject
Re: [ntp:questions] ntp peer
association in VLAN query
01/19/2009 11:04
AM
Please respond to
mayer at ntp.isc.org
kiran shirol wrote:
> My switch has configured for peering with the following switches
>
> ntp peer 101.1.1.2
> ntp peer 101.2.2.2
> ntp peer 102.1.1.2
>
> Vlan has the following configuration:
> ip address 10.1.1.1/24
> ip address 20.1.1.1/24 secondary
>
> Peer sends the NTP message 20.1.1.2(Out-Interface) -> 20.1.1.1(VLANs
secondary IP)
> The response comes as 10.1.1.1(VLANs Primary IP) -> 20.1.1.2
>
That means that the VLAN is using the wrong address to reply to the
message. NTP will see that it does not match the going address and will
discard the message. That's correct behavior. You need to figure out why
the packet is coming back with the incorrect address. i suspect the VLAN
but I cannot be sure.
Danny
> Traces:
> 2008-12-20 00:01:40.522776 20.1.1.2 -> 20.1.1.1 NTP NTP symmetric
active
> 2008-12-20 00:01:42.548166 10.1.1.1 -> 20.1.1.2 NTP NTP symmetric
passive
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