Cisco Cisco TelePresence Video Communication Server Expressway 관리 매뉴얼
Dial plan and call processing
Cisco VCS Administrator Guide (X7.0)
Page 191 of 488
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If the Include address record setting for the DNS zone being queried is set to Off, the VCS will
not query for A and AAAA records and instead will continue with the search, querying the remaining
lower priority zones.
not query for A and AAAA records and instead will continue with the search, querying the remaining
lower priority zones.
URI dialing via DNS for outgoing calls
When a user places a call using URI dialing, they will typically dial an address in the form
name@example.com
name@example.com
from their endpoint. Below is the process that is followed when a URI address is
dialed from an endpoint registered with your VCS, or received as a query from a neighbor system:
1. The VCS checks its
to see if any of them are configured with a Mode of either:
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Any alias, or
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Alias pattern match with a pattern that matches the URI address
2. The associated target zones are queried, in rule priority order, for the URI.
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If one of the target zones is a DNS zone, the VCS attempts to locate the endpoint through a DNS
lookup. It does this by querying the DNS server configured on the VCS for the location of the
domain as per the
lookup. It does this by querying the DNS server configured on the VCS for the location of the
domain as per the
. If the domain part of the URI address is
resolved successfully the request is forwarded to those addresses.
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If one of the target zones is a neighbor, traversal client or traversal server zones, those zones are
queried for the URI. If that system supports URI dialing via DNS, it may route the call itself.
queried for the URI. If that system supports URI dialing via DNS, it may route the call itself.
Adding and configuring DNS zones
To enable URI dialing via DNS, you must configure at least one DNS zone. To do this:
1. Go to the
Zones
page (
VCS configuration > Zones
).
2. Click New. You are taken to the
Create zone
page.
3. Enter a Name for the zone and select a Type of DNS.
4. Configure the DNS zone settings as follows:
Field
Guidelines
Hop
count
count
When dialing by URI via DNS, the hop count used is that configured for the DNS zone associated
with the search rule that matches the URI address (if this is lower than the hop count currently
assigned to the call).
with the search rule that matches the URI address (if this is lower than the hop count currently
assigned to the call).
If URI address isn't matched to a DNS zone, the query may be forwarded to a neighbor. In this
case, the hop count used will be that configured for the neighbor zone (if this is lower than the hop
count currently assigned to the call).
case, the hop count used will be that configured for the neighbor zone (if this is lower than the hop
count currently assigned to the call).
H.323
and SIP
modes
and SIP
modes
The H.323 and SIP sections allow you to filter calls to systems and endpoints located via this zone,
based on whether the call is located using SIP or H.323 SRV lookups.
based on whether the call is located using SIP or H.323 SRV lookups.