Cisco Cisco Expressway Maintenance Manual
Client Reconnection Times After Loss of Service
The time taken for a client to reconnect to the XMPP service depends on the re-login limits specified in the Cisco
Server Recovery Manager service parameters on the IM&P server.
Server Recovery Manager service parameters on the IM&P server.
for the IM&P version that you are running.
Temporary or Partial Loss of IM and Presence Service Federation
XMPP federation for IM and Presence Service via Expressway relies on a persistent TCP connection to the federated
server. If a federated server becomes unavailable due to a graceful shutdown, Expressway will immediately seek to
reestablish a connection with the federated server or with another server advertised by the federated partner.
server. If a federated server becomes unavailable due to a graceful shutdown, Expressway will immediately seek to
reestablish a connection with the federated server or with another server advertised by the federated partner.
If, however, the federated server fails abruptly, it can take up to 15 minutes for Expressway to discover the TCP
connection outage and attempt reconnection. During this time, a partial or full loss of IM and Presence Service
connectivity with the federated partner may occur.
connection outage and attempt reconnection. During this time, a partial or full loss of IM and Presence Service
connectivity with the federated partner may occur.
Jabber Guest Services Overview
Cisco Jabber Guest is a consumer to business (C2B) solution that extends the reach of Cisco's enterprise telephony
to people outside of a corporate firewall who do not have phones registered with Cisco Unified Communications
Manager.
to people outside of a corporate firewall who do not have phones registered with Cisco Unified Communications
Manager.
It allows an external user to click on a hyperlink (in an email or a web page) that will download and install (on first use)
an H.264 plugin into the user's browser. It then uses http-based call control to "dial" a URL to place a call to a
predefined destination inside the enterprise. The user is not required to open an account, create a password, or
otherwise authenticate.
an H.264 plugin into the user's browser. It then uses http-based call control to "dial" a URL to place a call to a
predefined destination inside the enterprise. The user is not required to open an account, create a password, or
otherwise authenticate.
To enable the call to be placed, it uses the Expressway solution (a secure traversal zone between the Expressway-C
and Expressway-E) as a Unified Communications gateway to traverse the firewall between the Jabber Guest client in
the internet and the Jabber Guest servers inside the enterprise to reach the destination user agent (endpoint).
and Expressway-E) as a Unified Communications gateway to traverse the firewall between the Jabber Guest client in
the internet and the Jabber Guest servers inside the enterprise to reach the destination user agent (endpoint).
Figure 9 Jabber Guest Components
82
Cisco Expressway Administrator Guide
Unified Communications