Default Multi-Vrf Ce Configuration; Multi-Vrf Ce Configuration Guidelines - Cisco ME 3400 Software Configuration Manual

Configuring Multi-VRF CE
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Default Multi-VRF CE Configuration

Table 35-14
Table 35-14
Feature
VRF
Maps
VRF maximum routes
Forwarding table

Multi-VRF CE Configuration Guidelines

These are considerations when configuring VRF in your network:
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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
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VPN forwarding—transports all traffic between all VPN community members across a VPN
service-provider network.
shows the default VRF configuration.
Default VRF Configuration
Default Setting
Disabled. No VRFs are defined.
No import maps, export maps, or route maps are defined.
5000
The default for an interface is the global routing table.
A switch with multi-VRF CE is shared by multiple customers, and each customer has its own routing
table.
Because customers use different VRF tables, the same IP addresses can be reused. Overlapped IP
addresses are allowed in different VPNs.
Multi-VRF CE lets multiple customers share the same physical link between the PE and the CE.
Trunk ports with multiple VLANs separate packets among customers. Each customer has its own
VLAN.
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 35-8, 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.
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BGP is designed for passing routing information between systems run by different
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administrations.
BGP makes it easy to pass attributes of the routes to the CE.
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Multi-VRF CE does not affect the packet switching rate.
If no VRFs are configured, up to 105 policies can be configured.
Chapter 35 Configuring IP Unicast Routing
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