Siemens RUGGEDCOM ROX II, User Manual

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RUGGEDCOM ROX II
CLI User Guide
Chapter 13
Unicast and Multicast Routing
VRF Concepts 557
• Section 13.11.13, “Managing Static VRF Routes”
• Section 13.11.14, “Managing Gateways for Static VRF Routes”
• Section 13.11.15, “Managing Interfaces for Static VRF Routes”
Section 13.11.1
VRF Concepts
This section describes some of the concepts important to the implementation of Virtual Routing and Forwarding
(VRF) in RUGGEDCOM ROX II.
CONTENTS
• Section 13.11.1.1, “VRF and VRF-Lite”
• Section 13.11.1.2, “Advantages and Disadvantages of Using VRF”
Section 13.11.1.1
VRF and VRF-Lite
Both full VRF and VRF-Lite employ the concept of VRFs to isolate interfaces, provide IP address reuse and manage
routing tables. Both also provide a level of security for those interfaces forward to the VRFs. Under full VRF, MPLS
is used in conjunction with IP/VPNs to provide a greater level of security than VRF-Lite.
RUGGEDCOM ROX II supports both VRF and VRF-Lite simultaneously. Use of full VRF interfaces and VRF-Lite
interfaces can be mixed.
Section 13.11.1.2
Advantages and Disadvantages of Using VRF
The advantages and disadvantages of using VRF include the following:
Advantages
• Create multiple isolated network pipes for various
data streams
• Provide individualized security for each VRF
• Manage each VRF separately for audit and billing
purposes
• Create separate Intranets within one work
environment
• Create VRFs based on differing services (e.g. Finance,
engineering, HR, etc.)
• Reduce the size of routing tables
• Re-use of IP addresses or subnets
• MPLS IP VPNs can replace much more expensive,
leased T1/E1 lines, while providing the same level of
security
Disadvantages
• Greater memory consumption. Each VRF configured
results in BGP route replication and requires new FIBs
and IP routing tables
• Extra processing (overhead) and memory consumption
due to namespace management