
FSX interface modules supporting Multi-VRF (Continued)TABLE 132
FSX Interface Modules Multi-VRF Support
SX-FI-24HF Yes
SX-FI-2XG Yes
SX-FI-8XG Yes
SX-FI-48GPP Yes
Routing Protocols and VRF Support TABLE 133
VRF Graceful Restart Helper Mode Graceful Restart Non-Stop Routing
RIP Yes No No No
RIPng No No No No
OSPFv2 Yes Yes Yes Yes
OSPFv3 Yes Yes No Yes
BGP4 Yes Yes Yes No
BGP4+ No Yes Yes No
Multi-VRF Overview
Virtual routing and forwarding (VRF) allows routers to maintain multiple routing tables and forwarding
tables on the same router. A Multi-VRF router can run multiple instances of routing protocols with a
neighboring router with overlapping address spaces configured on different VRF instances.
In Multi-VRF deployments:
• Two VRF-capable routers must be directly connected at Layer 3, deploying BGP, OSPF, RIP, or
Static routes.
• Each VRF maintains unique routing and forwarding tables.
• Each VRF can be assigned one or more Layer 3 interfaces on a router to be part of the VRF.
• Each VRF can be configured with IPv4 address family, IPv6 address family, or both.
• A packet’s VRF instance is determined based on the VRF index of the interface on which the packet
is received.
• Separate routing protocols instances are required for each VRF instance.
• Overlapping address spaces can be configured on different VRF instances.
Multi-VRF deployments provide the flexibility to maintain multiple virtual routers which are segregated
for each VRF instance.
Multi-VRF Overview
FastIron Ethernet Switch Layer 3 Routing Configuration Guide 637
53-1003087-04
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