Cisco Cisco Expressway 维护手册
Adding and configuring ENUM zones
To set up an ENUM zone:
1.
Go to Configuration > Zones > Zones.
2.
Click New. You are taken to the Create zone page.
3.
Enter a Name for the zone and select a Type of ENUM.
4.
Configure the ENUM zone settings as follows:
Field
Guidelines
Hop count
specified for an ENUM zone is applied in the same manner as hop counts for
other zone types. The currently applicable hop count is maintained when the Expressway
initiates a new search process for the alias returned by the DNS lookup.
initiates a new search process for the alias returned by the DNS lookup.
DNS suffix
The suffix to append to a transformed E.164 number to create an ENUM host name. It
represents the DNS zone (in the domain name space) to be queried for a NAPTR record.
represents the DNS zone (in the domain name space) to be queried for a NAPTR record.
H.323 mode
Controls if H.323 records are looked up for this zone.
SIP mode
Controls if SIP records are looked up for this zone.
5.
Click Create zone.
Note that:
■
Any number of ENUM zones may be configured on the Expressway. You should configure at least one ENUM
zone for each DNS suffix that your endpoints may use.
zone for each DNS suffix that your endpoints may use.
■
Normal search rule pattern matching and prioritization rules apply to ENUM zones.
■
to be used when searching for NAPTR
records.
Configuring search rules for ENUM zones
If you want to be able to make ENUM calls via the Expressway, then at a minimum you should configure an ENUM
zone and a related search rule with:
zone and a related search rule with:
■
a DNS suffix of
e164.arpa
(the domain specified by the ENUM standard)
■
a related search rule with a Mode of Any alias
This results in DNS always being queried for all types of aliases, not just ENUMs. It also means that ENUM dialing will
only be successful if the enterprise being dialed uses the
only be successful if the enterprise being dialed uses the
e164.arpa
domain. To ensure successful ENUM dialing, you
must configure an ENUM zone for each domain that holds NAPTR records for endpoints that callers in your enterprise
might want to dial.
might want to dial.
You can then set up search rules that filter the queries sent to each ENUM zone as follows:
■
use a Mode of Alias pattern match
■
use the Pattern string and Pattern type fields to define the aliases for each domain that will trigger an ENUM
lookup
lookup
For example, you want to enable ENUM dialing from your network to a remote office in the UK where the endpoints’
E.164 numbers start with
E.164 numbers start with
44
. You would configure an ENUM zone on your Expressway, and then an associated search
rule with:
■
Mode of Alias pattern match
■
Pattern string of
44
■
Pattern type of Prefix
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Cisco Expressway Administrator Guide