Cisco Cisco Expressway 维护手册
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Advanced SIP Settings
Field
Description
Usage tips
SDP max size
Specifies the maximum size of SDP payload that can be
handled by the Expressway (in bytes)
handled by the Expressway (in bytes)
Default is 32768 bytes.
SIP TCP connect
timeout
timeout
Specifies the maximum number of seconds to wait for an
outgoing SIP TCP connection to be established.
outgoing SIP TCP connection to be established.
Default is 10 seconds.
You can reduce this to speed up
the time between attempting a
broken route (eg. unavailable
onward SIP proxy peer) and failing
over to a good one.
the time between attempting a
broken route (eg. unavailable
onward SIP proxy peer) and failing
over to a good one.
Be careful in high latency networks
that you leave enough time for the
connection to establish.
that you leave enough time for the
connection to establish.
Configuring Domains
The Domains page (Configuration > Domains) lists the domains managed by this Expressway for Unified
Communications services.
Communications services.
A domain name can comprise multiple levels. Each level's name can only contain letters, digits and hyphens, with
each level separated by a period (dot). A level name cannot start or end with a hyphen, and the final level name must
start with a letter. An example valid domain name is
each level separated by a period (dot). A level name cannot start or end with a hyphen, and the final level name must
start with a letter. An example valid domain name is
100.example-name.com
.
Note that values shown in the Index column correspond to the numeric elements of the
%localdomain1%
,
%localdomain2%
, . . .
%localdomain200%
You can configure up to 200 domains. (Note that you cannot configure domains on an Expressway-E.)
Configuring the Supported Services for Unified Communications (Expressway-C Only)
the services that each domain will support. The options are:
■
SIP registrations and provisioning on Expressway: the Expressway is authoritative for this SIP domain. The
Expressway acts as a SIP registrar for the domain, and accepts registration requests for any SIP endpoints
attempting to register with an alias that includes this domain. The default is On.
Expressway acts as a SIP registrar for the domain, and accepts registration requests for any SIP endpoints
attempting to register with an alias that includes this domain. The default is On.
■
SIP registrations and provisioning on Unified CM: Endpoint registration, call control and provisioning for this
SIP domain is serviced by Unified CM. The Expressway acts as a Unified Communications gateway to provide
secure firewall traversal and line-side support for Unified CM registrations. The default is On.
SIP domain is serviced by Unified CM. The Expressway acts as a Unified Communications gateway to provide
secure firewall traversal and line-side support for Unified CM registrations. The default is On.
■
IM and Presence Service: Instant messaging and presence services for this SIP domain are provided by the
Unified CM IM and Presence service. The default is On.
Unified CM IM and Presence service. The default is On.
■
XMPP federation: Enables XMPP federation between this domain and partner domains. The default is On.
■
Deployment: Associates the domain with the selected deployment, if there are multiple deployments. This
setting is absent if there is only one deployment (there is always at least one).
setting is absent if there is only one deployment (there is always at least one).
Any domain configuration changes, when one or more existing domains are configured for IM and Presence services
on Unified CM or XMPP Federation will result in an automatic restart of the XCP router on both Expressway-C and
Expressway-E.
on Unified CM or XMPP Federation will result in an automatic restart of the XCP router on both Expressway-C and
Expressway-E.
The end-user impact is temporary loss of federation and any Jabber clients using mobile and remote access will be
temporarily disconnected. The clients will automatically reconnect after a short period.
temporarily disconnected. The clients will automatically reconnect after a short period.
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Cisco Expressway Administrator Guide
Protocols