Presentation on theme: "RMAUG Professional Development Series 11/17/2010 Dwight Reifsnyder."— Presentation transcript:
RMAUG Professional Development Series 11/17/2010 Dwight Reifsnyder
2 “If you have an apple and I have an apple and we exchange apples then you and I will still each have one apple. But if you have an idea and I have an idea and we exchange these ideas, then each of us will have two ideas.” George Bernard Shaw
Avaya Survivability Options SLS Features BVSD Application Programming Tips/Tricks Real world results
ESS – Enterprise Survivable Server ◦ ESS allows media servers to be used as alternate controllers within a system by leveraging IP control of port network gateways and can be completely independent of the main servers both functionally and geographically. ESS protects the communication system against a catastrophic main server failure and, at the same time, provides service to port network gateways that have been fragmented away from their current controlling entity. (Original white paper definition from my hero, Greg Weber LSP – Local Survivable Processor ◦ Avaya offers the Local Survivable Processor to continue to provide service in the case of broken connectivity between remote sites and main locations. In addition, Avaya empowers the administrator with the ability to define how the system behaves in the case of lost network connectivity. CM Featureset is still 3.0?, this is way is now AKA Enhanced Local Survivability SLS – Standard Local Survivability ◦ SLS is a configurable software module that enables a local Media Gateway to provide a core set of MGC functions when no link is available to the CM server, a Local Survivable Processor (LSP), or an Enterprise Survivable Server (ESS).
New Definitions… ◦ SCS - Survivable Core Server (ESS) ◦ SRS – Survivable Remote Server (LSP)
Survivable Remote Processor (SRP): In an SRP option, DEFINITY server SI provided continued service for a single fiber-Port Network Connected Center Stage Switch (fiber-PNC CSS) port network. ATM WAN Spare Processor (WSP): In a WSP option, multiple DEFINITY server R processor port networks provided continued service for systems with ATM port network connectivity
In engineering, redundancy is the duplication of critical components of a system with the intention of increasing reliability of the system, usually in the case of a backup or fail-safe. In computer networking resilience is the ability to provide and maintain an acceptable level of service in the face of faults and challenges to normal operation.
Call capability for analog, DCP, and IP phones ISDN BRI/PRI trunk interfaces Non-ISDN digital DS1 trunk interfaces Outbound dialing through the local PSTN (local trunk gateway) from analog, DCP, and IP phones Inbound calls from each trunk to pre-configured local analog or IP phones that have registered Direct inward dialing Multiple call appearances Hold and call transfer functions Contact closure feature Local call progress tones (dial tone, busy, etc.) Emergency Transfer Relay (ETR) in cases of power loss Auto fallback to primary MGC IP station registration
Many small business customers employ custom calling features such as call waiting, from the BOC/LEC, attempting a more PBX-like capability. These features are not supported by SLS. Calling party name/number information to digital station displays Caller ID on outgoing analog station calls Caller ID on incoming analog loop-start trunk calls Three party conferences Last Number Redial Call Forwarding-Busy/Don’t Answer No Music On Hold source or announcement playback Call Center features, including ASAI Connection Preserving Failover/Failback for H.248 Gateways
SLS is not a replacement for ESS or LSP survivability, which offer full call-feature functionality and full translations in the survivable mode. Instead, SLS is a cost-effective survivability alternative offering limited call processing in survivable mode.
ProductG250G350G430G450 Target Market Very Small RBO (2-14 seats) Small RBO (8-72 seats) Medium/large RBO (>40 seats) Endpoint support Model dependant Analog, DCP, PoE, BRI Analog, DCP, BRI PSTN Trunk options Model dependant FXO, BRI, T1/E1 Survivability options Dual WAN, Dialup backup, SLS, LSP Dual WAN, Dialup backup, SLS LSP Dual WAN, Dialup backup, SLS, LSP SLS IP Endpoints70 150240
In contrast to the server-based survivability features, SLS operates entirely from the media gateway and requires a data set comprised of Avaya Aura Communication Manager translations (survivable ARS analysis and configuration data).
This data set is compiled and distributed to a group of devices using the Provisioning and Installation Manager (PIM). In the absence of the PIM, the data set can be configured manually from individual media gateways using CLI commands.
0:008730 Primary becomes unavailable (simulate by disabling network ports) Phones start h323 link timer, value 1 minute Gateway’s start off h248 link timer, value 1 minute (+20 seconds) 8510 LSP is patiently waiting for an MGC to contact it, will not accept phone registrations until first gateway registers 1:00Phones begin scrolling through gatekeeper list, none will be available 1:20Gateways begin to attempt registration to LSP ~1:30Upon gateway registration LSP becomes active, begins to accept phones Phones continue registration to LSP until all are registered, end of sequence. Manual return to 8730 when it is available. 2:40If LSP is not available, Gateways initiate SLS mode at this time ~3:10Gateways are ready in SLS mode and begin accepting phone registrations Phones continue to register to SLS until all are registered. Gateway continues to search for available 8730 or 8510. If 8730 or 8510 becomes available, gateway begins recovery timer, after 3 minutes re-registers to 8730. Gateway exits SLS mode, phones reboot 5:00 Total search time is reached, if gateways were not programmed for SLS mode they would reboot at this time. With SLS enabled they should not reach this parameter. 12:00if phones have not yet registered with any gatekeeper, they reboot, get LLDP values and begin to search for a gatekeeper again.
By using existing POTs line, no additional costs are incurred Because we use defined extension ranges SLS configuration is simple and static LSP provides redundancy, SLS provides a third level of resilience Reliability of 911 (life safety) services are enhanced with no additional costs
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