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Configuring IP Unicast Routing
Configuring Multi-VRF CE
Multi-VRF CE does not support all MPLS-VRF functionality. It does not support label exchange, LDP adjacency, or
labeled packets.
For the PE router, there is no difference between using multi-VRF CE or using multiple CEs. In Figure 104 on
page 895, multiple virtual Layer 3 interfaces are connected to the multi-VRF CE device.
The switch supports configuring VRF by using physical ports, VLAN SVIs, or a combination of both. The SVIs can be
connected through an access port or a trunk port.
A customer can use multiple VLANs as long as they do not overlap with those of other customers. A customer’s
VLANs are mapped to a specific routing table ID that is used to identify the appropriate routing tables stored on the
switch.
The switch supports one global network and up to 26 VRFs.
Most routing protocols (BGP, OSPF, RIP, EIGRP, and static routing) can be used between the CE and the PE. However,
we recommend using external BGP (EBGP) for these reasons:
— BGP does not require multiple algorithms to communicate with multiple CEs.
— BGP is designed for passing routing information between systems run by different administrations.
— BGP makes it easy to pass attributes of the routes to the CE.
Multi-VRF CE does not affect the packet switching rate.
If no VRFs are configured, up to 105 policies can be configured.
If even one VRF is configured than 41 policies can be configured.
If more than 41 policies are configured then VRF cannot be configured.
VRF and private VLANs are mutually exclusive. You cannot enable VRF on a private VLAN. Similarly, you cannot
enable private VLAN on a VLAN with VRF configured on the VLAN interface.
VRF and policy-based routing (PBR) are mutually exclusive on a switch interface. You cannot enable VRF when PBR
is enabled on an interface. In contrast, you cannot enable PBR when VRF is enabled on an interface.
Configuring VRFs
Follow the steps in this procedure to configure one or more VRFs.
BEFORE YOU BEGIN
See Multi-VRF CE Configuration Guidelines, page 896.
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