Cisco Cisco Expressway Maintenance Manual
Field
Description
Usage tips
Type
The nature of the specified zone, in relation to the
local Expressway. Select Neighbor.
local Expressway. Select Neighbor.
After a zone has been created, the Type
cannot be changed.
cannot be changed.
Hop count
The hop count is the number of times a request
will be forwarded to a neighbor gatekeeper or
proxy (see the
will be forwarded to a neighbor gatekeeper or
proxy (see the
section for more
information). This field specifies the hop count to
use when sending a search request to this
particular zone.
use when sending 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.
another zone and already has a hop count
assigned, the lower of the two values is used.
H.323 section:
Mode
Determines whether H.323 calls are allowed to
and from the neighbor system.
and from the neighbor system.
Port
The port on the neighbor system used for H.323
searches initiated from the local Expressway.
searches initiated from the local Expressway.
This must be the same port number as that
configured on the neighbor system as its
H.323 UDP port.
configured on the neighbor system as its
H.323 UDP port.
SIP section:
Mode
Determines whether SIP calls are allowed to and
from the neighbor system.
from the neighbor system.
Port
The port on the neighbor system used for outgoing
SIP messages initiated from the local Expressway.
SIP messages initiated from the local Expressway.
This must be the same port number as that
configured on the neighbor system as its SIP
TCP, SIP TLS or SIP UDP listening port
(depending on which SIP Transport mode is
in use).
configured on the neighbor system as its SIP
TCP, SIP TLS or SIP UDP listening port
(depending on which SIP Transport mode is
in use).
Transport
Determines which transport type is used for SIP
calls to and from the neighbor system. The default
is TLS.
calls to and from the neighbor system. The default
is TLS.
TLS verify
mode
mode
Controls whether the Expressway performs X.509
certificate checking against the neighbor system
when communicating over TLS.
certificate checking against the neighbor system
when communicating over TLS.
If the neighbor system is another Expressway,
both systems can verify each other's
certificate (known as mutual authentication).
See
both systems can verify each other's
certificate (known as mutual authentication).
See
for more information.
Media
encryption
mode
encryption
mode
Controls the media encryption policy applied by
the Expressway for SIP calls (including
interworked calls) to and from this zone.
the Expressway for SIP calls (including
interworked calls) to and from this zone.
ICE support
Controls whether ICE messages are supported by
the devices in this zone.
the devices in this zone.
for more information.
Authentication section:
Authentication
policy
policy
Controls how the Expressway authenticates
incoming messages from this zone and whether
they are subsequently treated as authenticated,
unauthenticated, or are rejected.
incoming messages from this zone and whether
they are subsequently treated as authenticated,
unauthenticated, or are rejected.
The behavior varies for H.323 messages, SIP
messages that originate from a local domain
and SIP messages that originate from non-
local domains. See
messages that originate from a local domain
and SIP messages that originate from non-
local domains. See
information.
SIP
authentication
trust mode
authentication
trust mode
Controls whether authenticated SIP messages
(ones containing a P-Asserted-Identity header)
from this zone are trusted without further
challenge.
(ones containing a P-Asserted-Identity header)
from this zone are trusted without further
challenge.
for
more information.
99
Cisco Expressway Administrator Guide
Zones and Neighbors