Nortel Application Switch 2424-SSL EB1412028E5 Manuel D’Utilisation
Codes de produits
EB1412028E5
Nortel
Nortel Application Switch 2424/3408
Evaluation of Resiliency and Load Balancing on
a Network Supporting Microsoft Live Communications Server 2005
a Network Supporting Microsoft Live Communications Server 2005
Premise: The convergence of voice, data
and video services onto the enterprise LAN
demands that the underlying infrastructure
deliver load balancing and resiliency for
servers that support converged services like
enterprise instant messaging, voice, video
and other real-time services.
and video services onto the enterprise LAN
demands that the underlying infrastructure
deliver load balancing and resiliency for
servers that support converged services like
enterprise instant messaging, voice, video
and other real-time services.
ortel commissioned The Tolly
Group to evaluate a converged
network infrastructure for Enter-
prise users to illustrate the load
Group to evaluate a converged
network infrastructure for Enter-
prise users to illustrate the load
balancing capabilities of its Nortel
Application Switch 2424/3408.
Application Switch 2424/3408.
The series of tests called for demonstrat-
ing that Application Switches can load
balance user sessions across Microsoft
Live Communications Server 2005 (LCS
Server) within a pool, both on-site and
across a network. Tests also aimed to ver-
ify that the Application Switch provides
resiliency by seamlessly taking over the
available and new user sessions from
other sites in the network, in the event of a
failure of an available Application Switch
or LCS server.
ing that Application Switches can load
balance user sessions across Microsoft
Live Communications Server 2005 (LCS
Server) within a pool, both on-site and
across a network. Tests also aimed to ver-
ify that the Application Switch provides
resiliency by seamlessly taking over the
available and new user sessions from
other sites in the network, in the event of a
failure of an available Application Switch
or LCS server.
The test bed consisted of a resilient infra-
structure of Nortel Ethernet Routing
Switches (ERS) including multiple ERS
8600 units at the core communicating
with ERS 8300 and ERS 5520 PoE
devices at the network edge.
structure of Nortel Ethernet Routing
Switches (ERS) including multiple ERS
8600 units at the core communicating
with ERS 8300 and ERS 5520 PoE
devices at the network edge.
Telephony and video services were built
on the Microsoft LCS servers and users
placed calls and transmitted video across
the test network. tests were conducted for
both Global Server Load Balancing
on the Microsoft LCS servers and users
placed calls and transmitted video across
the test network. tests were conducted for
both Global Server Load Balancing
and
also Local Server Load Balancing.
Test
Summary
Summary
TOLLY
T
H
E
G R O U P
Nortel’s Global Server Load Balancing solution operating
on the Nortel Application Switch delivers uninterrupted
service to Microsoft Live Communications Server 2005
on the Nortel Application Switch delivers uninterrupted
service to Microsoft Live Communications Server 2005
Microsoft LCS servers can be load balanced for faster
response, increased reliability, and to maintain user
sessions seamlessly in the event of an outage to other
LCS servers in the network
response, increased reliability, and to maintain user
sessions seamlessly in the event of an outage to other
LCS servers in the network
User voice and video sessions migrate gracefully during
failover of a Application Switch or when the local LCS
server managing those sessions failed
failover of a Application Switch or when the local LCS
server managing those sessions failed
Test Highlights
No. 207177
January 2007
N
© 2007 The Tolly Group
Page 1
Global and Local Server Load Balancing
on Nortel Application Switches Supporting
Microsoft Live Communications Server 2005
Global Server Load
Balancing (GSLB)
Local Server Load
Balancing (SLB)
Resiliency with
uninterrupted user voice
and video sessions
uninterrupted user voice
and video sessions
User session load
balancing
balancing
Across the
network
Local (On site)
Note: GSLB resiliency was tested by failing the Application Switch controlling the LCS
server to induce transfer of user sessions to active LCS servers network wide. SLB
resiliency was tested similarly, though sessions transferred to LCS servers on site.
server to induce transfer of user sessions to active LCS servers network wide. SLB
resiliency was tested similarly, though sessions transferred to LCS servers on site.
Figure 1
Source: The Tolly Group, November 2006