Issue 1.1 June 2005 175
4. Resolve media server outages. If possible bring the Main server(s) back online first.
Note:
Note: Bringing a Main server back online will not cause the automatic return of the ESS
controlled Port Networks. Restoring Port Network control to a Main server in a
stable network requires proactive interaction. See step 7
below.
5. Resolve network fragmentation and outage issues per local practice.
6. Use either Avaya Fault and Performance Management or the System Access Terminal
(SAT) commands status ess port-network and status ess clusters to verify
that all media servers and network resources are operational.
!
CAUTION:
CAUTION: Issuing the commands below causes a service interruption. When Port Networks
switch to either a Main server or ESS server, a level 2 restart is initiated on the
Port Network. Service will be interrupted to the entire Port Network. Note that
shuffled IP to IP calls will not be dropped but during the restart they will not have
any access to features (Hold, Transfer, Conference, etc.).
7. When the Main server(s) and network are operational and stable, schedule or initiate an
on demand switch back of Port Networks to the Main server. At the Main server use
these commands:
Note:
Note: ATM PNC
When a Port Network, that is providing control for other sub-tending Port
Networks (via an ATM Expansion Interface) switches to a media server, the other
sub-tending Port Networks may or may not end up being controlled by the same
server. All IPSI controlled Port Network(s) in the configuration will vie for control
of the sub-tending Port Networks. The only way to guarantee that ATM
Expansion Interface controlled Port Networks will be controlled by the same
server, is if all IPSI controlled Port Networks are controlled by that same server.
● Schedule a switchback to the Main server with the change system-parmeters
ess command. See Administering ESS
on page 122 for more information.
The Auto Return field may be set to scheduled or no. If no is used, the only way to
initiate a switch back is by using a demand command (See below).
The system-parameters ess administration screen can be displayed at all ESS
servers but can only be changed at the Main server.
● Initiate an on demand switch back by using the get forced-takeover
ipserver-interface port-network N command. Note that this command may
be issued with a qualifier for all Port Networks or a single individual port-network
N.
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