Nortel SMC 2450, Implementation Manual

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Description Page 31 of 260
Secure Multimedia Controller Implementation Guide
protected domain, you need to modify the routing tables for devices on both
sides of the SMC
SMC static routing updates
The SMC has a default single gateway, which is expected to be in the intranet.
Each security zone is, by default, comprised of a subnet defined by a subnet
mask. If the security zone consists of numerous subnets, add a static route to
the SMC to route traffic to the subnets. The route specifies a gateway within
the subnets, such as the ELAN subnet or TLAN subnet, through which traffic
must be routed.
Network integration
Prior to deploying the SMC, all devices on each subnet must be connected to
a Layer-2 switch. The SMC does not support Virtual LANS (VLAN);
therefore, a single interface is required for each subnet.
In VLAN networks, multiple devices are connected across routes but are part
of the same subnet. Update these networks to identify the switch as the
primary interface through the SMC.
IMPORTANT!
When integrating the SMC into an existing network, you can encounter
routing issues. VoIP equipment must have the SMC as the primary
gateway. Configure the intranet core router to send all VoIP traffic
through the SMC.
The main router on the intranet side requires static routes for each of the
subnets protected by the SMC. The main router can use OSPF to
broadcast these routes and enable client connectivity.
IMPORTANT!
The SMC supports a single default gateway; it does not support dynamic
routing protocols such as Routing Information Protocol (RIP) or Open
Shortest Path First (OSPF) protocols.