Cisco Cisco Expressway Maintenance Manual
Field
Description
Usage tips
UDP retry count
The number of times the client attempts to send a
UDP probe to the Expressway-E during call setup.
UDP probe to the Expressway-E during call setup.
UDP keep alive
interval
interval
The interval (in seconds) with which the client sends
a UDP probe to the Expressway-E after a call is
established, in order to keep the firewall’s NAT
bindings open.
a UDP probe to the Expressway-E after a call is
established, in order to keep the firewall’s NAT
bindings open.
TCP retry
interval
interval
The interval (in seconds) with which the traversal
client sends a TCP probe to the Expressway-E if a
keep alive confirmation has not been received.
client sends a TCP probe to the Expressway-E if a
keep alive confirmation has not been received.
TCP retry count
The number of times the client attempts to send a
TCP probe to the Expressway-E during call setup.
TCP probe to the Expressway-E during call setup.
TCP keep alive
interval
interval
The interval (in seconds) with which the traversal
client sends a TCP probe to the Expressway-E when
a call is in place, in order to maintain the firewall’s
NAT bindings.
client sends a TCP probe to the Expressway-E when
a call is in place, in order to maintain the firewall’s
NAT bindings.
Table 6 Traversal server zone configuration reference (continued)
Configuring ENUM Zones
ENUM zones allow you to locate endpoints via an ENUM lookup. You can create one or more search rules for ENUM
zones based on the ENUM DNS suffix used and/or by pattern matching of the endpoints’ aliases.
zones based on the ENUM DNS suffix used and/or by pattern matching of the endpoints’ aliases.
After you have configured one or more ENUM zones, you can:
■
apply transforms to alias search requests directed to that group of endpoints
■
control the bandwidth used for calls between your local Expressway and each group of ENUM endpoints
section.
The configurable options for an ENUM zone are:
Field
Description
Usage tips
Name The name acts as a unique identifier, allowing you to distinguish
between zones of the same type.
Type
The nature of the specified zone, in relation to the local Expressway.
Select ENUM.
Select ENUM.
After a zone has been created, the
Type cannot be changed.
Type cannot be changed.
Hop
count
count
The hop count is the number of times a request will be forwarded to a
neighbor gatekeeper or proxy (see the
neighbor gatekeeper or proxy (see the
information). This field specifies the hop count to use when sending
a search request to this particular zone.
a search request to this particular zone.
If the search request was received
from another zone and already has
a hop count assigned, the lower of
the two values is used.
from another zone and already has
a hop count assigned, the lower of
the two values is used.
DNS
suffix
suffix
The domain to be appended to the transformed E.164 number to
create an ENUM domain for which this zone is queried.
create an ENUM domain for which this zone is queried.
H.323
mode
mode
Determines whether H.323 records are looked up for this zone.
SIP
mode
mode
Determines whether SIP records are looked up for this zone.
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Cisco Expressway Administrator Guide