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Nokia Network Voyager for IPSO 4.0 Reference Guide 475
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5. (Optional) For each IP address on the interface, you can specify the following parameters,
described in Table 30.
Advertise Address
Preference
6. Click Apply.
7. Click Save to make your changes permanent.
To disable router discovery services
1. Click Router Discovery under Configuration > Router Services in the tree view.
2. Click Off for each interface to disable support for router discovery service.
3. Click Apply.
4. Click Save to make your changes permanent.
Network Time Protocol (NTP)
Network Time Protocol (NTP) is an Internet standard protocol used to synchronize the clocks of
computers in a network to the millisecond. Synchronized clock times are critical for distributed
applications that require time synchronization, such as Check Point FireWall-1 Sync, and for
purposes such as analyzing event logs from different devices, ensuring cron jobs execute at the
correct time, and ensuring that applications that use system time to validate certificates find the
correct time.
NTP runs as a continuous background client program on a computer, sending periodic time
requests to the servers that you configure, obtaining server time stamps and using them to adjust
the client’s clock. You should configure several servers for redundancy.
When you configure devices as peers, they listen to each other and move toward a common time.
Peers are considered equal with each other as opposed to servers, which are considered masters.
It is important that you configure several peers so that they can decide on the right time.
If an NTP server or peer is not available, you can turn on the NTP reference clock to have your
server configured as a source of time information. In this mode, Nokia recommends that you
keep the stratum value at its default (1). The stratum value tells how far away the NTP reference
clock is from a valid time source.
The time server begins to provide time information 5 minutes after it is configured.
Note
IPSO does not implement SNTP.