Answers to your Questions
How do I test new services before deployment?
RFC-2547 VPNs, VLANs, and multicast services can be tested
by simulating the services at the same time as emulating routing
protocols and injecting traffic. Here are some test scenarios
to consider:
- Measure basic
forwarding statistics (such as throughput, latency and
packet loss) for VLAN tagged.
- Test complex
functional test configurations (for example, integrating
VLAN within MPLS BGP VPN performance measurements.
- Verify the ability of a router to act as a "One
Arm Router" - that is, the ability to forward VLAN tagged
traffic from one VLAN to many others on the same VLAN enabled
router.
- Determine the ability of a system or network to insert
and remove VLAN tags when forwarding data traffic, and
measure the effect of this process (inserting and removing
VLAN tags) on router or network performance.
- Simulate multiple customer sites in an MPLS
VPN test configuration. Replacing multiple physical
interfaces (each with VLAN connections) with RouterTester
drastically reduces the complexity of test configurations
and reduces your testbed equipment.
- Emulate many virtual
interfaces (up to 4095) and measure the impact of an
increasing number of virtual interfaces on the forwarding
performance of high performance routers.
- Test BGP/MPLS
VPN configuration, performance, and scalability.
For a technology overview and a more complete description
of test solutions for hot new services, see
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Network Services 
