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Chapter 7 Device Advanced Settings
7.10 Cache
Use this screen to configure a device's DNS caching. To open this screen, click a device, click
Device Operation and then click Device Configuration > Advanced > DNS > Cache in the
navigation panel.
Figure 100 Device Operation > Device Configuration > Advanced > DNS > Cache
The following table describes the labels in this screen.
Table 91 Device Operation > Device Configuration > Advanced > DNS > Cache
LABEL
Cache Setup
Cache Positive DNS
Resolutions
Maximum TTL
Cache Negative
DNS Resolutions
Negative Cache
Period
Apply
Reset
7.11 DDNS
Use this screen to configure your Dynamic DNS (DDNS) on the device. To open this screen,
click a device, click Device Operation in the menu bar and then click Device Configuration
> Advanced > DNS > DDNS.
208
DESCRIPTION
Select the check box to record the positive DNS resolutions in the cache.
Caching positive DNS resolutions helps speed up the device's processing of
commonly queried domain names and reduces the amount of traffic that the
device sends out to the WAN.
Type the maximum time to live (TTL) (60 to 3600 seconds). This sets how long
the device is to allow a positive resolution entry to remain in the DNS cache
before discarding it.
Caching negative DNS resolutions helps speed up the device's processing of
commonly queried domain names (for which DNS resolution has failed) and
reduces the amount of traffic that the device sends out to the WAN.
Type the time (60 to 3600 seconds) that the device is to allow a negative
resolution entry to remain in the DNS cache before discarding it.
Click this to save your changes back to the device.
Click this to begin configuring this screen afresh.
Vantage CNM User's Guide
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Troubleshooting
